1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2014-2015 MediaTek Inc.
4 * Author: Chaotian.Jing <chaotian.jing@mediatek.com>
7 #include <linux/module.h>
9 #include <linux/delay.h>
10 #include <linux/dma-mapping.h>
11 #include <linux/ioport.h>
12 #include <linux/irq.h>
13 #include <linux/of_address.h>
14 #include <linux/of_device.h>
15 #include <linux/of_irq.h>
16 #include <linux/of_gpio.h>
17 #include <linux/pinctrl/consumer.h>
18 #include <linux/platform_device.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/regulator/consumer.h>
22 #include <linux/slab.h>
23 #include <linux/spinlock.h>
24 #include <linux/interrupt.h>
26 #include <linux/mmc/card.h>
27 #include <linux/mmc/core.h>
28 #include <linux/mmc/host.h>
29 #include <linux/mmc/mmc.h>
30 #include <linux/mmc/sd.h>
31 #include <linux/mmc/sdio.h>
32 #include <linux/mmc/slot-gpio.h>
34 #define MAX_BD_NUM 1024
36 /*--------------------------------------------------------------------------*/
37 /* Common Definition */
38 /*--------------------------------------------------------------------------*/
39 #define MSDC_BUS_1BITS 0x0
40 #define MSDC_BUS_4BITS 0x1
41 #define MSDC_BUS_8BITS 0x2
43 #define MSDC_BURST_64B 0x6
45 /*--------------------------------------------------------------------------*/
47 /*--------------------------------------------------------------------------*/
49 #define MSDC_IOCON 0x04
52 #define MSDC_INTEN 0x10
53 #define MSDC_FIFOCS 0x14
58 #define SDC_RESP0 0x40
59 #define SDC_RESP1 0x44
60 #define SDC_RESP2 0x48
61 #define SDC_RESP3 0x4c
62 #define SDC_BLK_NUM 0x50
63 #define SDC_ADV_CFG0 0x64
64 #define EMMC_IOCON 0x7c
65 #define SDC_ACMD_RESP 0x80
66 #define DMA_SA_H4BIT 0x8c
67 #define MSDC_DMA_SA 0x90
68 #define MSDC_DMA_CTRL 0x98
69 #define MSDC_DMA_CFG 0x9c
70 #define MSDC_PATCH_BIT 0xb0
71 #define MSDC_PATCH_BIT1 0xb4
72 #define MSDC_PATCH_BIT2 0xb8
73 #define MSDC_PAD_TUNE 0xec
74 #define MSDC_PAD_TUNE0 0xf0
75 #define PAD_DS_TUNE 0x188
76 #define PAD_CMD_TUNE 0x18c
77 #define EMMC50_CFG0 0x208
78 #define EMMC50_CFG3 0x220
79 #define SDC_FIFO_CFG 0x228
81 /*--------------------------------------------------------------------------*/
82 /* Top Pad Register Offset */
83 /*--------------------------------------------------------------------------*/
84 #define EMMC_TOP_CONTROL 0x00
85 #define EMMC_TOP_CMD 0x04
86 #define EMMC50_PAD_DS_TUNE 0x0c
88 /*--------------------------------------------------------------------------*/
90 /*--------------------------------------------------------------------------*/
93 #define MSDC_CFG_MODE (0x1 << 0) /* RW */
94 #define MSDC_CFG_CKPDN (0x1 << 1) /* RW */
95 #define MSDC_CFG_RST (0x1 << 2) /* RW */
96 #define MSDC_CFG_PIO (0x1 << 3) /* RW */
97 #define MSDC_CFG_CKDRVEN (0x1 << 4) /* RW */
98 #define MSDC_CFG_BV18SDT (0x1 << 5) /* RW */
99 #define MSDC_CFG_BV18PSS (0x1 << 6) /* R */
100 #define MSDC_CFG_CKSTB (0x1 << 7) /* R */
101 #define MSDC_CFG_CKDIV (0xff << 8) /* RW */
102 #define MSDC_CFG_CKMOD (0x3 << 16) /* RW */
103 #define MSDC_CFG_HS400_CK_MODE (0x1 << 18) /* RW */
104 #define MSDC_CFG_HS400_CK_MODE_EXTRA (0x1 << 22) /* RW */
105 #define MSDC_CFG_CKDIV_EXTRA (0xfff << 8) /* RW */
106 #define MSDC_CFG_CKMOD_EXTRA (0x3 << 20) /* RW */
108 /* MSDC_IOCON mask */
109 #define MSDC_IOCON_SDR104CKS (0x1 << 0) /* RW */
110 #define MSDC_IOCON_RSPL (0x1 << 1) /* RW */
111 #define MSDC_IOCON_DSPL (0x1 << 2) /* RW */
112 #define MSDC_IOCON_DDLSEL (0x1 << 3) /* RW */
113 #define MSDC_IOCON_DDR50CKD (0x1 << 4) /* RW */
114 #define MSDC_IOCON_DSPLSEL (0x1 << 5) /* RW */
115 #define MSDC_IOCON_W_DSPL (0x1 << 8) /* RW */
116 #define MSDC_IOCON_D0SPL (0x1 << 16) /* RW */
117 #define MSDC_IOCON_D1SPL (0x1 << 17) /* RW */
118 #define MSDC_IOCON_D2SPL (0x1 << 18) /* RW */
119 #define MSDC_IOCON_D3SPL (0x1 << 19) /* RW */
120 #define MSDC_IOCON_D4SPL (0x1 << 20) /* RW */
121 #define MSDC_IOCON_D5SPL (0x1 << 21) /* RW */
122 #define MSDC_IOCON_D6SPL (0x1 << 22) /* RW */
123 #define MSDC_IOCON_D7SPL (0x1 << 23) /* RW */
124 #define MSDC_IOCON_RISCSZ (0x3 << 24) /* RW */
127 #define MSDC_PS_CDEN (0x1 << 0) /* RW */
128 #define MSDC_PS_CDSTS (0x1 << 1) /* R */
129 #define MSDC_PS_CDDEBOUNCE (0xf << 12) /* RW */
130 #define MSDC_PS_DAT (0xff << 16) /* R */
131 #define MSDC_PS_CMD (0x1 << 24) /* R */
132 #define MSDC_PS_WP (0x1 << 31) /* R */
135 #define MSDC_INT_MMCIRQ (0x1 << 0) /* W1C */
136 #define MSDC_INT_CDSC (0x1 << 1) /* W1C */
137 #define MSDC_INT_ACMDRDY (0x1 << 3) /* W1C */
138 #define MSDC_INT_ACMDTMO (0x1 << 4) /* W1C */
139 #define MSDC_INT_ACMDCRCERR (0x1 << 5) /* W1C */
140 #define MSDC_INT_DMAQ_EMPTY (0x1 << 6) /* W1C */
141 #define MSDC_INT_SDIOIRQ (0x1 << 7) /* W1C */
142 #define MSDC_INT_CMDRDY (0x1 << 8) /* W1C */
143 #define MSDC_INT_CMDTMO (0x1 << 9) /* W1C */
144 #define MSDC_INT_RSPCRCERR (0x1 << 10) /* W1C */
145 #define MSDC_INT_CSTA (0x1 << 11) /* R */
146 #define MSDC_INT_XFER_COMPL (0x1 << 12) /* W1C */
147 #define MSDC_INT_DXFER_DONE (0x1 << 13) /* W1C */
148 #define MSDC_INT_DATTMO (0x1 << 14) /* W1C */
149 #define MSDC_INT_DATCRCERR (0x1 << 15) /* W1C */
150 #define MSDC_INT_ACMD19_DONE (0x1 << 16) /* W1C */
151 #define MSDC_INT_DMA_BDCSERR (0x1 << 17) /* W1C */
152 #define MSDC_INT_DMA_GPDCSERR (0x1 << 18) /* W1C */
153 #define MSDC_INT_DMA_PROTECT (0x1 << 19) /* W1C */
155 /* MSDC_INTEN mask */
156 #define MSDC_INTEN_MMCIRQ (0x1 << 0) /* RW */
157 #define MSDC_INTEN_CDSC (0x1 << 1) /* RW */
158 #define MSDC_INTEN_ACMDRDY (0x1 << 3) /* RW */
159 #define MSDC_INTEN_ACMDTMO (0x1 << 4) /* RW */
160 #define MSDC_INTEN_ACMDCRCERR (0x1 << 5) /* RW */
161 #define MSDC_INTEN_DMAQ_EMPTY (0x1 << 6) /* RW */
162 #define MSDC_INTEN_SDIOIRQ (0x1 << 7) /* RW */
163 #define MSDC_INTEN_CMDRDY (0x1 << 8) /* RW */
164 #define MSDC_INTEN_CMDTMO (0x1 << 9) /* RW */
165 #define MSDC_INTEN_RSPCRCERR (0x1 << 10) /* RW */
166 #define MSDC_INTEN_CSTA (0x1 << 11) /* RW */
167 #define MSDC_INTEN_XFER_COMPL (0x1 << 12) /* RW */
168 #define MSDC_INTEN_DXFER_DONE (0x1 << 13) /* RW */
169 #define MSDC_INTEN_DATTMO (0x1 << 14) /* RW */
170 #define MSDC_INTEN_DATCRCERR (0x1 << 15) /* RW */
171 #define MSDC_INTEN_ACMD19_DONE (0x1 << 16) /* RW */
172 #define MSDC_INTEN_DMA_BDCSERR (0x1 << 17) /* RW */
173 #define MSDC_INTEN_DMA_GPDCSERR (0x1 << 18) /* RW */
174 #define MSDC_INTEN_DMA_PROTECT (0x1 << 19) /* RW */
176 /* MSDC_FIFOCS mask */
177 #define MSDC_FIFOCS_RXCNT (0xff << 0) /* R */
178 #define MSDC_FIFOCS_TXCNT (0xff << 16) /* R */
179 #define MSDC_FIFOCS_CLR (0x1 << 31) /* RW */
182 #define SDC_CFG_SDIOINTWKUP (0x1 << 0) /* RW */
183 #define SDC_CFG_INSWKUP (0x1 << 1) /* RW */
184 #define SDC_CFG_BUSWIDTH (0x3 << 16) /* RW */
185 #define SDC_CFG_SDIO (0x1 << 19) /* RW */
186 #define SDC_CFG_SDIOIDE (0x1 << 20) /* RW */
187 #define SDC_CFG_INTATGAP (0x1 << 21) /* RW */
188 #define SDC_CFG_DTOC (0xff << 24) /* RW */
191 #define SDC_STS_SDCBUSY (0x1 << 0) /* RW */
192 #define SDC_STS_CMDBUSY (0x1 << 1) /* RW */
193 #define SDC_STS_SWR_COMPL (0x1 << 31) /* RW */
195 /* SDC_ADV_CFG0 mask */
196 #define SDC_RX_ENHANCE_EN (0x1 << 20) /* RW */
198 /* DMA_SA_H4BIT mask */
199 #define DMA_ADDR_HIGH_4BIT (0xf << 0) /* RW */
201 /* MSDC_DMA_CTRL mask */
202 #define MSDC_DMA_CTRL_START (0x1 << 0) /* W */
203 #define MSDC_DMA_CTRL_STOP (0x1 << 1) /* W */
204 #define MSDC_DMA_CTRL_RESUME (0x1 << 2) /* W */
205 #define MSDC_DMA_CTRL_MODE (0x1 << 8) /* RW */
206 #define MSDC_DMA_CTRL_LASTBUF (0x1 << 10) /* RW */
207 #define MSDC_DMA_CTRL_BRUSTSZ (0x7 << 12) /* RW */
209 /* MSDC_DMA_CFG mask */
210 #define MSDC_DMA_CFG_STS (0x1 << 0) /* R */
211 #define MSDC_DMA_CFG_DECSEN (0x1 << 1) /* RW */
212 #define MSDC_DMA_CFG_AHBHPROT2 (0x2 << 8) /* RW */
213 #define MSDC_DMA_CFG_ACTIVEEN (0x2 << 12) /* RW */
214 #define MSDC_DMA_CFG_CS12B16B (0x1 << 16) /* RW */
216 /* MSDC_PATCH_BIT mask */
217 #define MSDC_PATCH_BIT_ODDSUPP (0x1 << 1) /* RW */
218 #define MSDC_INT_DAT_LATCH_CK_SEL (0x7 << 7)
219 #define MSDC_CKGEN_MSDC_DLY_SEL (0x1f << 10)
220 #define MSDC_PATCH_BIT_IODSSEL (0x1 << 16) /* RW */
221 #define MSDC_PATCH_BIT_IOINTSEL (0x1 << 17) /* RW */
222 #define MSDC_PATCH_BIT_BUSYDLY (0xf << 18) /* RW */
223 #define MSDC_PATCH_BIT_WDOD (0xf << 22) /* RW */
224 #define MSDC_PATCH_BIT_IDRTSEL (0x1 << 26) /* RW */
225 #define MSDC_PATCH_BIT_CMDFSEL (0x1 << 27) /* RW */
226 #define MSDC_PATCH_BIT_INTDLSEL (0x1 << 28) /* RW */
227 #define MSDC_PATCH_BIT_SPCPUSH (0x1 << 29) /* RW */
228 #define MSDC_PATCH_BIT_DECRCTMO (0x1 << 30) /* RW */
230 #define MSDC_PATCH_BIT1_STOP_DLY (0xf << 8) /* RW */
232 #define MSDC_PATCH_BIT2_CFGRESP (0x1 << 15) /* RW */
233 #define MSDC_PATCH_BIT2_CFGCRCSTS (0x1 << 28) /* RW */
234 #define MSDC_PB2_SUPPORT_64G (0x1 << 1) /* RW */
235 #define MSDC_PB2_RESPWAIT (0x3 << 2) /* RW */
236 #define MSDC_PB2_RESPSTSENSEL (0x7 << 16) /* RW */
237 #define MSDC_PB2_CRCSTSENSEL (0x7 << 29) /* RW */
239 #define MSDC_PAD_TUNE_DATWRDLY (0x1f << 0) /* RW */
240 #define MSDC_PAD_TUNE_DATRRDLY (0x1f << 8) /* RW */
241 #define MSDC_PAD_TUNE_CMDRDLY (0x1f << 16) /* RW */
242 #define MSDC_PAD_TUNE_CMDRRDLY (0x1f << 22) /* RW */
243 #define MSDC_PAD_TUNE_CLKTDLY (0x1f << 27) /* RW */
244 #define MSDC_PAD_TUNE_RXDLYSEL (0x1 << 15) /* RW */
245 #define MSDC_PAD_TUNE_RD_SEL (0x1 << 13) /* RW */
246 #define MSDC_PAD_TUNE_CMD_SEL (0x1 << 21) /* RW */
248 #define PAD_DS_TUNE_DLY1 (0x1f << 2) /* RW */
249 #define PAD_DS_TUNE_DLY2 (0x1f << 7) /* RW */
250 #define PAD_DS_TUNE_DLY3 (0x1f << 12) /* RW */
252 #define PAD_CMD_TUNE_RX_DLY3 (0x1f << 1) /* RW */
254 #define EMMC50_CFG_PADCMD_LATCHCK (0x1 << 0) /* RW */
255 #define EMMC50_CFG_CRCSTS_EDGE (0x1 << 3) /* RW */
256 #define EMMC50_CFG_CFCSTS_SEL (0x1 << 4) /* RW */
258 #define EMMC50_CFG3_OUTS_WR (0x1f << 0) /* RW */
260 #define SDC_FIFO_CFG_WRVALIDSEL (0x1 << 24) /* RW */
261 #define SDC_FIFO_CFG_RDVALIDSEL (0x1 << 25) /* RW */
263 /* EMMC_TOP_CONTROL mask */
264 #define PAD_RXDLY_SEL (0x1 << 0) /* RW */
265 #define DELAY_EN (0x1 << 1) /* RW */
266 #define PAD_DAT_RD_RXDLY2 (0x1f << 2) /* RW */
267 #define PAD_DAT_RD_RXDLY (0x1f << 7) /* RW */
268 #define PAD_DAT_RD_RXDLY2_SEL (0x1 << 12) /* RW */
269 #define PAD_DAT_RD_RXDLY_SEL (0x1 << 13) /* RW */
270 #define DATA_K_VALUE_SEL (0x1 << 14) /* RW */
271 #define SDC_RX_ENH_EN (0x1 << 15) /* TW */
273 /* EMMC_TOP_CMD mask */
274 #define PAD_CMD_RXDLY2 (0x1f << 0) /* RW */
275 #define PAD_CMD_RXDLY (0x1f << 5) /* RW */
276 #define PAD_CMD_RD_RXDLY2_SEL (0x1 << 10) /* RW */
277 #define PAD_CMD_RD_RXDLY_SEL (0x1 << 11) /* RW */
278 #define PAD_CMD_TX_DLY (0x1f << 12) /* RW */
280 #define REQ_CMD_EIO (0x1 << 0)
281 #define REQ_CMD_TMO (0x1 << 1)
282 #define REQ_DAT_ERR (0x1 << 2)
283 #define REQ_STOP_EIO (0x1 << 3)
284 #define REQ_STOP_TMO (0x1 << 4)
285 #define REQ_CMD_BUSY (0x1 << 5)
287 #define MSDC_PREPARE_FLAG (0x1 << 0)
288 #define MSDC_ASYNC_FLAG (0x1 << 1)
289 #define MSDC_MMAP_FLAG (0x1 << 2)
291 #define MTK_MMC_AUTOSUSPEND_DELAY 50
292 #define CMD_TIMEOUT (HZ/10 * 5) /* 100ms x5 */
293 #define DAT_TIMEOUT (HZ * 5) /* 1000ms x5 */
295 #define DEFAULT_DEBOUNCE (8) /* 8 cycles CD debounce */
297 #define PAD_DELAY_MAX 32 /* PAD delay cells */
298 /*--------------------------------------------------------------------------*/
299 /* Descriptor Structure */
300 /*--------------------------------------------------------------------------*/
301 struct mt_gpdma_desc {
303 #define GPDMA_DESC_HWO (0x1 << 0)
304 #define GPDMA_DESC_BDP (0x1 << 1)
305 #define GPDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */
306 #define GPDMA_DESC_INT (0x1 << 16)
307 #define GPDMA_DESC_NEXT_H4 (0xf << 24)
308 #define GPDMA_DESC_PTR_H4 (0xf << 28)
312 #define GPDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */
313 #define GPDMA_DESC_EXTLEN (0xff << 16) /* bit16 ~ bit23 */
319 struct mt_bdma_desc {
321 #define BDMA_DESC_EOL (0x1 << 0)
322 #define BDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */
323 #define BDMA_DESC_BLKPAD (0x1 << 17)
324 #define BDMA_DESC_DWPAD (0x1 << 18)
325 #define BDMA_DESC_NEXT_H4 (0xf << 24)
326 #define BDMA_DESC_PTR_H4 (0xf << 28)
330 #define BDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */
334 struct scatterlist *sg; /* I/O scatter list */
335 struct mt_gpdma_desc *gpd; /* pointer to gpd array */
336 struct mt_bdma_desc *bd; /* pointer to bd array */
337 dma_addr_t gpd_addr; /* the physical address of gpd array */
338 dma_addr_t bd_addr; /* the physical address of bd array */
341 struct msdc_save_para {
354 u32 emmc_top_control;
356 u32 emmc50_pad_ds_tune;
359 struct mtk_mmc_compatible {
361 bool hs400_tune; /* only used for MT8173 */
369 bool use_internal_cd;
372 struct msdc_tune_para {
376 u32 emmc_top_control;
380 struct msdc_delay_phase {
388 const struct mtk_mmc_compatible *dev_comp;
389 struct mmc_host *mmc; /* mmc structure */
393 struct mmc_request *mrq;
394 struct mmc_command *cmd;
395 struct mmc_data *data;
398 void __iomem *base; /* host base address */
399 void __iomem *top_base; /* host top register base address */
401 struct msdc_dma dma; /* dma channel */
404 u32 timeout_ns; /* data timeout ns */
405 u32 timeout_clks; /* data timeout clks */
407 struct pinctrl *pinctrl;
408 struct pinctrl_state *pins_default;
409 struct pinctrl_state *pins_uhs;
410 struct delayed_work req_timeout;
411 int irq; /* host interrupt */
413 struct clk *src_clk; /* msdc source clock */
414 struct clk *h_clk; /* msdc h_clk */
415 struct clk *bus_clk; /* bus clock which used to access register */
416 struct clk *src_clk_cg; /* msdc source clock control gate */
417 u32 mclk; /* mmc subsystem clock frequency */
418 u32 src_clk_freq; /* source clock frequency */
419 unsigned char timing;
423 u32 hs200_cmd_int_delay; /* cmd internal delay for HS200/SDR104 */
424 u32 hs400_cmd_int_delay; /* cmd internal delay for HS400 */
425 bool hs400_cmd_resp_sel_rising;
426 /* cmd response sample selection for HS400 */
427 bool hs400_mode; /* current eMMC will run at hs400 mode */
428 bool internal_cd; /* Use internal card-detect logic */
429 struct msdc_save_para save_para; /* used when gate HCLK */
430 struct msdc_tune_para def_tune_para; /* default tune setting */
431 struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */
434 static const struct mtk_mmc_compatible mt8135_compat = {
437 .pad_tune_reg = MSDC_PAD_TUNE,
441 .stop_clk_fix = false,
443 .support_64g = false,
446 static const struct mtk_mmc_compatible mt8173_compat = {
449 .pad_tune_reg = MSDC_PAD_TUNE,
453 .stop_clk_fix = false,
455 .support_64g = false,
458 static const struct mtk_mmc_compatible mt8183_compat = {
461 .pad_tune_reg = MSDC_PAD_TUNE0,
465 .stop_clk_fix = true,
470 static const struct mtk_mmc_compatible mt2701_compat = {
473 .pad_tune_reg = MSDC_PAD_TUNE0,
477 .stop_clk_fix = false,
479 .support_64g = false,
482 static const struct mtk_mmc_compatible mt2712_compat = {
485 .pad_tune_reg = MSDC_PAD_TUNE0,
489 .stop_clk_fix = true,
494 static const struct mtk_mmc_compatible mt7622_compat = {
497 .pad_tune_reg = MSDC_PAD_TUNE0,
501 .stop_clk_fix = true,
503 .support_64g = false,
506 static const struct mtk_mmc_compatible mt8516_compat = {
509 .pad_tune_reg = MSDC_PAD_TUNE0,
513 .stop_clk_fix = true,
516 static const struct mtk_mmc_compatible mt7620_compat = {
519 .pad_tune_reg = MSDC_PAD_TUNE,
523 .stop_clk_fix = false,
525 .use_internal_cd = true,
528 static const struct of_device_id msdc_of_ids[] = {
529 { .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat},
530 { .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat},
531 { .compatible = "mediatek,mt8183-mmc", .data = &mt8183_compat},
532 { .compatible = "mediatek,mt2701-mmc", .data = &mt2701_compat},
533 { .compatible = "mediatek,mt2712-mmc", .data = &mt2712_compat},
534 { .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat},
535 { .compatible = "mediatek,mt8516-mmc", .data = &mt8516_compat},
536 { .compatible = "mediatek,mt7620-mmc", .data = &mt7620_compat},
539 MODULE_DEVICE_TABLE(of, msdc_of_ids);
541 static void sdr_set_bits(void __iomem *reg, u32 bs)
543 u32 val = readl(reg);
549 static void sdr_clr_bits(void __iomem *reg, u32 bs)
551 u32 val = readl(reg);
557 static void sdr_set_field(void __iomem *reg, u32 field, u32 val)
559 unsigned int tv = readl(reg);
562 tv |= ((val) << (ffs((unsigned int)field) - 1));
566 static void sdr_get_field(void __iomem *reg, u32 field, u32 *val)
568 unsigned int tv = readl(reg);
570 *val = ((tv & field) >> (ffs((unsigned int)field) - 1));
573 static void msdc_reset_hw(struct msdc_host *host)
577 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_RST);
578 while (readl(host->base + MSDC_CFG) & MSDC_CFG_RST)
581 sdr_set_bits(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR);
582 while (readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_CLR)
585 val = readl(host->base + MSDC_INT);
586 writel(val, host->base + MSDC_INT);
589 static void msdc_cmd_next(struct msdc_host *host,
590 struct mmc_request *mrq, struct mmc_command *cmd);
592 static const u32 cmd_ints_mask = MSDC_INTEN_CMDRDY | MSDC_INTEN_RSPCRCERR |
593 MSDC_INTEN_CMDTMO | MSDC_INTEN_ACMDRDY |
594 MSDC_INTEN_ACMDCRCERR | MSDC_INTEN_ACMDTMO;
595 static const u32 data_ints_mask = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO |
596 MSDC_INTEN_DATCRCERR | MSDC_INTEN_DMA_BDCSERR |
597 MSDC_INTEN_DMA_GPDCSERR | MSDC_INTEN_DMA_PROTECT;
599 static u8 msdc_dma_calcs(u8 *buf, u32 len)
603 for (i = 0; i < len; i++)
605 return 0xff - (u8) sum;
608 static inline void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
609 struct mmc_data *data)
611 unsigned int j, dma_len;
612 dma_addr_t dma_address;
614 struct scatterlist *sg;
615 struct mt_gpdma_desc *gpd;
616 struct mt_bdma_desc *bd;
624 gpd->gpd_info |= GPDMA_DESC_HWO;
625 gpd->gpd_info |= GPDMA_DESC_BDP;
626 /* need to clear first. use these bits to calc checksum */
627 gpd->gpd_info &= ~GPDMA_DESC_CHECKSUM;
628 gpd->gpd_info |= msdc_dma_calcs((u8 *) gpd, 16) << 8;
631 for_each_sg(data->sg, sg, data->sg_count, j) {
632 dma_address = sg_dma_address(sg);
633 dma_len = sg_dma_len(sg);
636 bd[j].bd_info &= ~BDMA_DESC_BLKPAD;
637 bd[j].bd_info &= ~BDMA_DESC_DWPAD;
638 bd[j].ptr = lower_32_bits(dma_address);
639 if (host->dev_comp->support_64g) {
640 bd[j].bd_info &= ~BDMA_DESC_PTR_H4;
641 bd[j].bd_info |= (upper_32_bits(dma_address) & 0xf)
644 bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN;
645 bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN);
647 if (j == data->sg_count - 1) /* the last bd */
648 bd[j].bd_info |= BDMA_DESC_EOL;
650 bd[j].bd_info &= ~BDMA_DESC_EOL;
652 /* checksume need to clear first */
653 bd[j].bd_info &= ~BDMA_DESC_CHECKSUM;
654 bd[j].bd_info |= msdc_dma_calcs((u8 *)(&bd[j]), 16) << 8;
657 sdr_set_field(host->base + MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, 1);
658 dma_ctrl = readl_relaxed(host->base + MSDC_DMA_CTRL);
659 dma_ctrl &= ~(MSDC_DMA_CTRL_BRUSTSZ | MSDC_DMA_CTRL_MODE);
660 dma_ctrl |= (MSDC_BURST_64B << 12 | 1 << 8);
661 writel_relaxed(dma_ctrl, host->base + MSDC_DMA_CTRL);
662 if (host->dev_comp->support_64g)
663 sdr_set_field(host->base + DMA_SA_H4BIT, DMA_ADDR_HIGH_4BIT,
664 upper_32_bits(dma->gpd_addr) & 0xf);
665 writel(lower_32_bits(dma->gpd_addr), host->base + MSDC_DMA_SA);
668 static void msdc_prepare_data(struct msdc_host *host, struct mmc_request *mrq)
670 struct mmc_data *data = mrq->data;
672 if (!(data->host_cookie & MSDC_PREPARE_FLAG)) {
673 data->host_cookie |= MSDC_PREPARE_FLAG;
674 data->sg_count = dma_map_sg(host->dev, data->sg, data->sg_len,
675 mmc_get_dma_dir(data));
679 static void msdc_unprepare_data(struct msdc_host *host, struct mmc_request *mrq)
681 struct mmc_data *data = mrq->data;
683 if (data->host_cookie & MSDC_ASYNC_FLAG)
686 if (data->host_cookie & MSDC_PREPARE_FLAG) {
687 dma_unmap_sg(host->dev, data->sg, data->sg_len,
688 mmc_get_dma_dir(data));
689 data->host_cookie &= ~MSDC_PREPARE_FLAG;
693 /* clock control primitives */
694 static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks)
699 host->timeout_ns = ns;
700 host->timeout_clks = clks;
701 if (host->mmc->actual_clock == 0) {
704 clk_ns = 1000000000UL / host->mmc->actual_clock;
705 timeout = (ns + clk_ns - 1) / clk_ns + clks;
706 /* in 1048576 sclk cycle unit */
707 timeout = (timeout + (0x1 << 20) - 1) >> 20;
708 if (host->dev_comp->clk_div_bits == 8)
709 sdr_get_field(host->base + MSDC_CFG,
710 MSDC_CFG_CKMOD, &mode);
712 sdr_get_field(host->base + MSDC_CFG,
713 MSDC_CFG_CKMOD_EXTRA, &mode);
714 /*DDR mode will double the clk cycles for data timeout */
715 timeout = mode >= 2 ? timeout * 2 : timeout;
716 timeout = timeout > 1 ? timeout - 1 : 0;
717 timeout = timeout > 255 ? 255 : timeout;
719 sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, timeout);
722 static void msdc_gate_clock(struct msdc_host *host)
724 clk_disable_unprepare(host->src_clk_cg);
725 clk_disable_unprepare(host->src_clk);
726 clk_disable_unprepare(host->bus_clk);
727 clk_disable_unprepare(host->h_clk);
730 static void msdc_ungate_clock(struct msdc_host *host)
732 clk_prepare_enable(host->h_clk);
733 clk_prepare_enable(host->bus_clk);
734 clk_prepare_enable(host->src_clk);
735 clk_prepare_enable(host->src_clk_cg);
736 while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
740 static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
746 u32 tune_reg = host->dev_comp->pad_tune_reg;
749 dev_dbg(host->dev, "set mclk to 0\n");
751 host->mmc->actual_clock = 0;
752 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
756 flags = readl(host->base + MSDC_INTEN);
757 sdr_clr_bits(host->base + MSDC_INTEN, flags);
758 if (host->dev_comp->clk_div_bits == 8)
759 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE);
761 sdr_clr_bits(host->base + MSDC_CFG,
762 MSDC_CFG_HS400_CK_MODE_EXTRA);
763 if (timing == MMC_TIMING_UHS_DDR50 ||
764 timing == MMC_TIMING_MMC_DDR52 ||
765 timing == MMC_TIMING_MMC_HS400) {
766 if (timing == MMC_TIMING_MMC_HS400)
769 mode = 0x2; /* ddr mode and use divisor */
771 if (hz >= (host->src_clk_freq >> 2)) {
772 div = 0; /* mean div = 1/4 */
773 sclk = host->src_clk_freq >> 2; /* sclk = clk / 4 */
775 div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2);
776 sclk = (host->src_clk_freq >> 2) / div;
780 if (timing == MMC_TIMING_MMC_HS400 &&
781 hz >= (host->src_clk_freq >> 1)) {
782 if (host->dev_comp->clk_div_bits == 8)
783 sdr_set_bits(host->base + MSDC_CFG,
784 MSDC_CFG_HS400_CK_MODE);
786 sdr_set_bits(host->base + MSDC_CFG,
787 MSDC_CFG_HS400_CK_MODE_EXTRA);
788 sclk = host->src_clk_freq >> 1;
789 div = 0; /* div is ignore when bit18 is set */
791 } else if (hz >= host->src_clk_freq) {
792 mode = 0x1; /* no divisor */
794 sclk = host->src_clk_freq;
796 mode = 0x0; /* use divisor */
797 if (hz >= (host->src_clk_freq >> 1)) {
798 div = 0; /* mean div = 1/2 */
799 sclk = host->src_clk_freq >> 1; /* sclk = clk / 2 */
801 div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2);
802 sclk = (host->src_clk_freq >> 2) / div;
805 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
807 * As src_clk/HCLK use the same bit to gate/ungate,
808 * So if want to only gate src_clk, need gate its parent(mux).
810 if (host->src_clk_cg)
811 clk_disable_unprepare(host->src_clk_cg);
813 clk_disable_unprepare(clk_get_parent(host->src_clk));
814 if (host->dev_comp->clk_div_bits == 8)
815 sdr_set_field(host->base + MSDC_CFG,
816 MSDC_CFG_CKMOD | MSDC_CFG_CKDIV,
819 sdr_set_field(host->base + MSDC_CFG,
820 MSDC_CFG_CKMOD_EXTRA | MSDC_CFG_CKDIV_EXTRA,
822 if (host->src_clk_cg)
823 clk_prepare_enable(host->src_clk_cg);
825 clk_prepare_enable(clk_get_parent(host->src_clk));
827 while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
829 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
830 host->mmc->actual_clock = sclk;
832 host->timing = timing;
833 /* need because clk changed. */
834 msdc_set_timeout(host, host->timeout_ns, host->timeout_clks);
835 sdr_set_bits(host->base + MSDC_INTEN, flags);
838 * mmc_select_hs400() will drop to 50Mhz and High speed mode,
839 * tune result of hs200/200Mhz is not suitable for 50Mhz
841 if (host->mmc->actual_clock <= 52000000) {
842 writel(host->def_tune_para.iocon, host->base + MSDC_IOCON);
843 if (host->top_base) {
844 writel(host->def_tune_para.emmc_top_control,
845 host->top_base + EMMC_TOP_CONTROL);
846 writel(host->def_tune_para.emmc_top_cmd,
847 host->top_base + EMMC_TOP_CMD);
849 writel(host->def_tune_para.pad_tune,
850 host->base + tune_reg);
853 writel(host->saved_tune_para.iocon, host->base + MSDC_IOCON);
854 writel(host->saved_tune_para.pad_cmd_tune,
855 host->base + PAD_CMD_TUNE);
856 if (host->top_base) {
857 writel(host->saved_tune_para.emmc_top_control,
858 host->top_base + EMMC_TOP_CONTROL);
859 writel(host->saved_tune_para.emmc_top_cmd,
860 host->top_base + EMMC_TOP_CMD);
862 writel(host->saved_tune_para.pad_tune,
863 host->base + tune_reg);
867 if (timing == MMC_TIMING_MMC_HS400 &&
868 host->dev_comp->hs400_tune)
869 sdr_set_field(host->base + tune_reg,
870 MSDC_PAD_TUNE_CMDRRDLY,
871 host->hs400_cmd_int_delay);
872 dev_dbg(host->dev, "sclk: %d, timing: %d\n", host->mmc->actual_clock,
876 static inline u32 msdc_cmd_find_resp(struct msdc_host *host,
877 struct mmc_request *mrq, struct mmc_command *cmd)
881 switch (mmc_resp_type(cmd)) {
882 /* Actually, R1, R5, R6, R7 are the same */
904 static inline u32 msdc_cmd_prepare_raw_cmd(struct msdc_host *host,
905 struct mmc_request *mrq, struct mmc_command *cmd)
908 * vol_swt << 30 | auto_cmd << 28 | blklen << 16 | go_irq << 15 |
909 * stop << 14 | rw << 13 | dtype << 11 | rsptyp << 7 | brk << 6 | opcode
911 u32 opcode = cmd->opcode;
912 u32 resp = msdc_cmd_find_resp(host, mrq, cmd);
913 u32 rawcmd = (opcode & 0x3f) | ((resp & 0x7) << 7);
915 host->cmd_rsp = resp;
917 if ((opcode == SD_IO_RW_DIRECT && cmd->flags == (unsigned int) -1) ||
918 opcode == MMC_STOP_TRANSMISSION)
919 rawcmd |= (0x1 << 14);
920 else if (opcode == SD_SWITCH_VOLTAGE)
921 rawcmd |= (0x1 << 30);
922 else if (opcode == SD_APP_SEND_SCR ||
923 opcode == SD_APP_SEND_NUM_WR_BLKS ||
924 (opcode == SD_SWITCH && mmc_cmd_type(cmd) == MMC_CMD_ADTC) ||
925 (opcode == SD_APP_SD_STATUS && mmc_cmd_type(cmd) == MMC_CMD_ADTC) ||
926 (opcode == MMC_SEND_EXT_CSD && mmc_cmd_type(cmd) == MMC_CMD_ADTC))
927 rawcmd |= (0x1 << 11);
930 struct mmc_data *data = cmd->data;
932 if (mmc_op_multi(opcode)) {
933 if (mmc_card_mmc(host->mmc->card) && mrq->sbc &&
934 !(mrq->sbc->arg & 0xFFFF0000))
935 rawcmd |= 0x2 << 28; /* AutoCMD23 */
938 rawcmd |= ((data->blksz & 0xFFF) << 16);
939 if (data->flags & MMC_DATA_WRITE)
940 rawcmd |= (0x1 << 13);
941 if (data->blocks > 1)
942 rawcmd |= (0x2 << 11);
944 rawcmd |= (0x1 << 11);
945 /* Always use dma mode */
946 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_PIO);
948 if (host->timeout_ns != data->timeout_ns ||
949 host->timeout_clks != data->timeout_clks)
950 msdc_set_timeout(host, data->timeout_ns,
953 writel(data->blocks, host->base + SDC_BLK_NUM);
958 static void msdc_start_data(struct msdc_host *host, struct mmc_request *mrq,
959 struct mmc_command *cmd, struct mmc_data *data)
965 read = data->flags & MMC_DATA_READ;
967 mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
968 msdc_dma_setup(host, &host->dma, data);
969 sdr_set_bits(host->base + MSDC_INTEN, data_ints_mask);
970 sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1);
971 dev_dbg(host->dev, "DMA start\n");
972 dev_dbg(host->dev, "%s: cmd=%d DMA data: %d blocks; read=%d\n",
973 __func__, cmd->opcode, data->blocks, read);
976 static int msdc_auto_cmd_done(struct msdc_host *host, int events,
977 struct mmc_command *cmd)
979 u32 *rsp = cmd->resp;
981 rsp[0] = readl(host->base + SDC_ACMD_RESP);
983 if (events & MSDC_INT_ACMDRDY) {
987 if (events & MSDC_INT_ACMDCRCERR) {
988 cmd->error = -EILSEQ;
989 host->error |= REQ_STOP_EIO;
990 } else if (events & MSDC_INT_ACMDTMO) {
991 cmd->error = -ETIMEDOUT;
992 host->error |= REQ_STOP_TMO;
995 "%s: AUTO_CMD%d arg=%08X; rsp %08X; cmd_error=%d\n",
996 __func__, cmd->opcode, cmd->arg, rsp[0], cmd->error);
1001 static void msdc_track_cmd_data(struct msdc_host *host,
1002 struct mmc_command *cmd, struct mmc_data *data)
1005 dev_dbg(host->dev, "%s: cmd=%d arg=%08X; host->error=0x%08X\n",
1006 __func__, cmd->opcode, cmd->arg, host->error);
1009 static void msdc_request_done(struct msdc_host *host, struct mmc_request *mrq)
1011 unsigned long flags;
1014 ret = cancel_delayed_work(&host->req_timeout);
1016 /* delay work already running */
1019 spin_lock_irqsave(&host->lock, flags);
1021 spin_unlock_irqrestore(&host->lock, flags);
1023 msdc_track_cmd_data(host, mrq->cmd, mrq->data);
1025 msdc_unprepare_data(host, mrq);
1026 mmc_request_done(host->mmc, mrq);
1029 /* returns true if command is fully handled; returns false otherwise */
1030 static bool msdc_cmd_done(struct msdc_host *host, int events,
1031 struct mmc_request *mrq, struct mmc_command *cmd)
1035 unsigned long flags;
1036 u32 *rsp = cmd->resp;
1038 if (mrq->sbc && cmd == mrq->cmd &&
1039 (events & (MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR
1040 | MSDC_INT_ACMDTMO)))
1041 msdc_auto_cmd_done(host, events, mrq->sbc);
1043 sbc_error = mrq->sbc && mrq->sbc->error;
1045 if (!sbc_error && !(events & (MSDC_INT_CMDRDY
1046 | MSDC_INT_RSPCRCERR
1047 | MSDC_INT_CMDTMO)))
1050 spin_lock_irqsave(&host->lock, flags);
1053 spin_unlock_irqrestore(&host->lock, flags);
1058 sdr_clr_bits(host->base + MSDC_INTEN, cmd_ints_mask);
1060 if (cmd->flags & MMC_RSP_PRESENT) {
1061 if (cmd->flags & MMC_RSP_136) {
1062 rsp[0] = readl(host->base + SDC_RESP3);
1063 rsp[1] = readl(host->base + SDC_RESP2);
1064 rsp[2] = readl(host->base + SDC_RESP1);
1065 rsp[3] = readl(host->base + SDC_RESP0);
1067 rsp[0] = readl(host->base + SDC_RESP0);
1071 if (!sbc_error && !(events & MSDC_INT_CMDRDY)) {
1072 if (cmd->opcode != MMC_SEND_TUNING_BLOCK &&
1073 cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200)
1075 * should not clear fifo/interrupt as the tune data
1076 * may have alreay come.
1078 msdc_reset_hw(host);
1079 if (events & MSDC_INT_RSPCRCERR) {
1080 cmd->error = -EILSEQ;
1081 host->error |= REQ_CMD_EIO;
1082 } else if (events & MSDC_INT_CMDTMO) {
1083 cmd->error = -ETIMEDOUT;
1084 host->error |= REQ_CMD_TMO;
1089 "%s: cmd=%d arg=%08X; rsp %08X; cmd_error=%d\n",
1090 __func__, cmd->opcode, cmd->arg, rsp[0],
1093 msdc_cmd_next(host, mrq, cmd);
1097 /* It is the core layer's responsibility to ensure card status
1098 * is correct before issue a request. but host design do below
1099 * checks recommended.
1101 static inline bool msdc_cmd_is_ready(struct msdc_host *host,
1102 struct mmc_request *mrq, struct mmc_command *cmd)
1104 /* The max busy time we can endure is 20ms */
1105 unsigned long tmo = jiffies + msecs_to_jiffies(20);
1107 while ((readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) &&
1108 time_before(jiffies, tmo))
1110 if (readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) {
1111 dev_err(host->dev, "CMD bus busy detected\n");
1112 host->error |= REQ_CMD_BUSY;
1113 msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
1117 if (mmc_resp_type(cmd) == MMC_RSP_R1B || cmd->data) {
1118 tmo = jiffies + msecs_to_jiffies(20);
1119 /* R1B or with data, should check SDCBUSY */
1120 while ((readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) &&
1121 time_before(jiffies, tmo))
1123 if (readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) {
1124 dev_err(host->dev, "Controller busy detected\n");
1125 host->error |= REQ_CMD_BUSY;
1126 msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
1133 static void msdc_start_command(struct msdc_host *host,
1134 struct mmc_request *mrq, struct mmc_command *cmd)
1137 unsigned long flags;
1142 mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
1143 if (!msdc_cmd_is_ready(host, mrq, cmd))
1146 if ((readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_TXCNT) >> 16 ||
1147 readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_RXCNT) {
1148 dev_err(host->dev, "TX/RX FIFO non-empty before start of IO. Reset\n");
1149 msdc_reset_hw(host);
1153 rawcmd = msdc_cmd_prepare_raw_cmd(host, mrq, cmd);
1155 spin_lock_irqsave(&host->lock, flags);
1156 sdr_set_bits(host->base + MSDC_INTEN, cmd_ints_mask);
1157 spin_unlock_irqrestore(&host->lock, flags);
1159 writel(cmd->arg, host->base + SDC_ARG);
1160 writel(rawcmd, host->base + SDC_CMD);
1163 static void msdc_cmd_next(struct msdc_host *host,
1164 struct mmc_request *mrq, struct mmc_command *cmd)
1167 !(cmd->error == -EILSEQ &&
1168 (cmd->opcode == MMC_SEND_TUNING_BLOCK ||
1169 cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200))) ||
1170 (mrq->sbc && mrq->sbc->error))
1171 msdc_request_done(host, mrq);
1172 else if (cmd == mrq->sbc)
1173 msdc_start_command(host, mrq, mrq->cmd);
1174 else if (!cmd->data)
1175 msdc_request_done(host, mrq);
1177 msdc_start_data(host, mrq, cmd, cmd->data);
1180 static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq)
1182 struct msdc_host *host = mmc_priv(mmc);
1189 msdc_prepare_data(host, mrq);
1191 /* if SBC is required, we have HW option and SW option.
1192 * if HW option is enabled, and SBC does not have "special" flags,
1193 * use HW option, otherwise use SW option
1195 if (mrq->sbc && (!mmc_card_mmc(mmc->card) ||
1196 (mrq->sbc->arg & 0xFFFF0000)))
1197 msdc_start_command(host, mrq, mrq->sbc);
1199 msdc_start_command(host, mrq, mrq->cmd);
1202 static void msdc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
1204 struct msdc_host *host = mmc_priv(mmc);
1205 struct mmc_data *data = mrq->data;
1210 msdc_prepare_data(host, mrq);
1211 data->host_cookie |= MSDC_ASYNC_FLAG;
1214 static void msdc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
1217 struct msdc_host *host = mmc_priv(mmc);
1218 struct mmc_data *data;
1223 if (data->host_cookie) {
1224 data->host_cookie &= ~MSDC_ASYNC_FLAG;
1225 msdc_unprepare_data(host, mrq);
1229 static void msdc_data_xfer_next(struct msdc_host *host,
1230 struct mmc_request *mrq, struct mmc_data *data)
1232 if (mmc_op_multi(mrq->cmd->opcode) && mrq->stop && !mrq->stop->error &&
1234 msdc_start_command(host, mrq, mrq->stop);
1236 msdc_request_done(host, mrq);
1239 static bool msdc_data_xfer_done(struct msdc_host *host, u32 events,
1240 struct mmc_request *mrq, struct mmc_data *data)
1242 struct mmc_command *stop = data->stop;
1243 unsigned long flags;
1245 unsigned int check_data = events &
1246 (MSDC_INT_XFER_COMPL | MSDC_INT_DATCRCERR | MSDC_INT_DATTMO
1247 | MSDC_INT_DMA_BDCSERR | MSDC_INT_DMA_GPDCSERR
1248 | MSDC_INT_DMA_PROTECT);
1250 spin_lock_irqsave(&host->lock, flags);
1254 spin_unlock_irqrestore(&host->lock, flags);
1259 if (check_data || (stop && stop->error)) {
1260 dev_dbg(host->dev, "DMA status: 0x%8X\n",
1261 readl(host->base + MSDC_DMA_CFG));
1262 sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP,
1264 while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS)
1266 sdr_clr_bits(host->base + MSDC_INTEN, data_ints_mask);
1267 dev_dbg(host->dev, "DMA stop\n");
1269 if ((events & MSDC_INT_XFER_COMPL) && (!stop || !stop->error)) {
1270 data->bytes_xfered = data->blocks * data->blksz;
1272 dev_dbg(host->dev, "interrupt events: %x\n", events);
1273 msdc_reset_hw(host);
1274 host->error |= REQ_DAT_ERR;
1275 data->bytes_xfered = 0;
1277 if (events & MSDC_INT_DATTMO)
1278 data->error = -ETIMEDOUT;
1279 else if (events & MSDC_INT_DATCRCERR)
1280 data->error = -EILSEQ;
1282 dev_dbg(host->dev, "%s: cmd=%d; blocks=%d",
1283 __func__, mrq->cmd->opcode, data->blocks);
1284 dev_dbg(host->dev, "data_error=%d xfer_size=%d\n",
1285 (int)data->error, data->bytes_xfered);
1288 msdc_data_xfer_next(host, mrq, data);
1294 static void msdc_set_buswidth(struct msdc_host *host, u32 width)
1296 u32 val = readl(host->base + SDC_CFG);
1298 val &= ~SDC_CFG_BUSWIDTH;
1302 case MMC_BUS_WIDTH_1:
1303 val |= (MSDC_BUS_1BITS << 16);
1305 case MMC_BUS_WIDTH_4:
1306 val |= (MSDC_BUS_4BITS << 16);
1308 case MMC_BUS_WIDTH_8:
1309 val |= (MSDC_BUS_8BITS << 16);
1313 writel(val, host->base + SDC_CFG);
1314 dev_dbg(host->dev, "Bus Width = %d", width);
1317 static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios)
1319 struct msdc_host *host = mmc_priv(mmc);
1322 if (!IS_ERR(mmc->supply.vqmmc)) {
1323 if (ios->signal_voltage != MMC_SIGNAL_VOLTAGE_330 &&
1324 ios->signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
1325 dev_err(host->dev, "Unsupported signal voltage!\n");
1329 ret = mmc_regulator_set_vqmmc(mmc, ios);
1331 dev_dbg(host->dev, "Regulator set error %d (%d)\n",
1332 ret, ios->signal_voltage);
1334 /* Apply different pinctrl settings for different signal voltage */
1335 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
1336 pinctrl_select_state(host->pinctrl, host->pins_uhs);
1338 pinctrl_select_state(host->pinctrl, host->pins_default);
1344 static int msdc_card_busy(struct mmc_host *mmc)
1346 struct msdc_host *host = mmc_priv(mmc);
1347 u32 status = readl(host->base + MSDC_PS);
1349 /* only check if data0 is low */
1350 return !(status & BIT(16));
1353 static void msdc_request_timeout(struct work_struct *work)
1355 struct msdc_host *host = container_of(work, struct msdc_host,
1358 /* simulate HW timeout status */
1359 dev_err(host->dev, "%s: aborting cmd/data/mrq\n", __func__);
1361 dev_err(host->dev, "%s: aborting mrq=%p cmd=%d\n", __func__,
1362 host->mrq, host->mrq->cmd->opcode);
1364 dev_err(host->dev, "%s: aborting cmd=%d\n",
1365 __func__, host->cmd->opcode);
1366 msdc_cmd_done(host, MSDC_INT_CMDTMO, host->mrq,
1368 } else if (host->data) {
1369 dev_err(host->dev, "%s: abort data: cmd%d; %d blocks\n",
1370 __func__, host->mrq->cmd->opcode,
1371 host->data->blocks);
1372 msdc_data_xfer_done(host, MSDC_INT_DATTMO, host->mrq,
1378 static void __msdc_enable_sdio_irq(struct mmc_host *mmc, int enb)
1380 unsigned long flags;
1381 struct msdc_host *host = mmc_priv(mmc);
1383 spin_lock_irqsave(&host->lock, flags);
1385 sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
1387 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
1388 spin_unlock_irqrestore(&host->lock, flags);
1391 static void msdc_enable_sdio_irq(struct mmc_host *mmc, int enb)
1393 struct msdc_host *host = mmc_priv(mmc);
1395 __msdc_enable_sdio_irq(mmc, enb);
1398 pm_runtime_get_noresume(host->dev);
1400 pm_runtime_put_noidle(host->dev);
1403 static irqreturn_t msdc_irq(int irq, void *dev_id)
1405 struct msdc_host *host = (struct msdc_host *) dev_id;
1408 unsigned long flags;
1409 struct mmc_request *mrq;
1410 struct mmc_command *cmd;
1411 struct mmc_data *data;
1412 u32 events, event_mask;
1414 spin_lock_irqsave(&host->lock, flags);
1415 events = readl(host->base + MSDC_INT);
1416 event_mask = readl(host->base + MSDC_INTEN);
1417 /* clear interrupts */
1418 writel(events & event_mask, host->base + MSDC_INT);
1423 spin_unlock_irqrestore(&host->lock, flags);
1425 if ((events & event_mask) & MSDC_INT_SDIOIRQ) {
1426 __msdc_enable_sdio_irq(host->mmc, 0);
1427 sdio_signal_irq(host->mmc);
1430 if ((events & event_mask) & MSDC_INT_CDSC) {
1431 if (host->internal_cd)
1432 mmc_detect_change(host->mmc, msecs_to_jiffies(20));
1433 events &= ~MSDC_INT_CDSC;
1436 if (!(events & (event_mask & ~MSDC_INT_SDIOIRQ)))
1441 "%s: MRQ=NULL; events=%08X; event_mask=%08X\n",
1442 __func__, events, event_mask);
1447 dev_dbg(host->dev, "%s: events=%08X\n", __func__, events);
1450 msdc_cmd_done(host, events, mrq, cmd);
1452 msdc_data_xfer_done(host, events, mrq, data);
1458 static void msdc_init_hw(struct msdc_host *host)
1461 u32 tune_reg = host->dev_comp->pad_tune_reg;
1463 /* Configure to MMC/SD mode, clock free running */
1464 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_MODE | MSDC_CFG_CKPDN);
1467 msdc_reset_hw(host);
1469 /* Disable and clear all interrupts */
1470 writel(0, host->base + MSDC_INTEN);
1471 val = readl(host->base + MSDC_INT);
1472 writel(val, host->base + MSDC_INT);
1474 /* Configure card detection */
1475 if (host->internal_cd) {
1476 sdr_set_field(host->base + MSDC_PS, MSDC_PS_CDDEBOUNCE,
1478 sdr_set_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1479 sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC);
1480 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1482 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1483 sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1484 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC);
1487 if (host->top_base) {
1488 writel(0, host->top_base + EMMC_TOP_CONTROL);
1489 writel(0, host->top_base + EMMC_TOP_CMD);
1491 writel(0, host->base + tune_reg);
1493 writel(0, host->base + MSDC_IOCON);
1494 sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 0);
1495 writel(0x403c0046, host->base + MSDC_PATCH_BIT);
1496 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1);
1497 writel(0xffff4089, host->base + MSDC_PATCH_BIT1);
1498 sdr_set_bits(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL);
1500 if (host->dev_comp->stop_clk_fix) {
1501 sdr_set_field(host->base + MSDC_PATCH_BIT1,
1502 MSDC_PATCH_BIT1_STOP_DLY, 3);
1503 sdr_clr_bits(host->base + SDC_FIFO_CFG,
1504 SDC_FIFO_CFG_WRVALIDSEL);
1505 sdr_clr_bits(host->base + SDC_FIFO_CFG,
1506 SDC_FIFO_CFG_RDVALIDSEL);
1509 if (host->dev_comp->busy_check)
1510 sdr_clr_bits(host->base + MSDC_PATCH_BIT1, (1 << 7));
1512 if (host->dev_comp->async_fifo) {
1513 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1514 MSDC_PB2_RESPWAIT, 3);
1515 if (host->dev_comp->enhance_rx) {
1517 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1520 sdr_set_bits(host->base + SDC_ADV_CFG0,
1523 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1524 MSDC_PB2_RESPSTSENSEL, 2);
1525 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1526 MSDC_PB2_CRCSTSENSEL, 2);
1528 /* use async fifo, then no need tune internal delay */
1529 sdr_clr_bits(host->base + MSDC_PATCH_BIT2,
1530 MSDC_PATCH_BIT2_CFGRESP);
1531 sdr_set_bits(host->base + MSDC_PATCH_BIT2,
1532 MSDC_PATCH_BIT2_CFGCRCSTS);
1535 if (host->dev_comp->support_64g)
1536 sdr_set_bits(host->base + MSDC_PATCH_BIT2,
1537 MSDC_PB2_SUPPORT_64G);
1538 if (host->dev_comp->data_tune) {
1539 if (host->top_base) {
1540 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1541 PAD_DAT_RD_RXDLY_SEL);
1542 sdr_clr_bits(host->top_base + EMMC_TOP_CONTROL,
1544 sdr_set_bits(host->top_base + EMMC_TOP_CMD,
1545 PAD_CMD_RD_RXDLY_SEL);
1547 sdr_set_bits(host->base + tune_reg,
1548 MSDC_PAD_TUNE_RD_SEL |
1549 MSDC_PAD_TUNE_CMD_SEL);
1552 /* choose clock tune */
1554 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1557 sdr_set_bits(host->base + tune_reg,
1558 MSDC_PAD_TUNE_RXDLYSEL);
1561 /* Configure to enable SDIO mode.
1562 * it's must otherwise sdio cmd5 failed
1564 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
1566 /* Config SDIO device detect interrupt function */
1567 if (host->mmc->caps & MMC_CAP_SDIO_IRQ)
1568 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1570 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1572 /* Configure to default data timeout */
1573 sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3);
1575 host->def_tune_para.iocon = readl(host->base + MSDC_IOCON);
1576 host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
1577 if (host->top_base) {
1578 host->def_tune_para.emmc_top_control =
1579 readl(host->top_base + EMMC_TOP_CONTROL);
1580 host->def_tune_para.emmc_top_cmd =
1581 readl(host->top_base + EMMC_TOP_CMD);
1582 host->saved_tune_para.emmc_top_control =
1583 readl(host->top_base + EMMC_TOP_CONTROL);
1584 host->saved_tune_para.emmc_top_cmd =
1585 readl(host->top_base + EMMC_TOP_CMD);
1587 host->def_tune_para.pad_tune = readl(host->base + tune_reg);
1588 host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
1590 dev_dbg(host->dev, "init hardware done!");
1593 static void msdc_deinit_hw(struct msdc_host *host)
1597 if (host->internal_cd) {
1598 /* Disabled card-detect */
1599 sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1600 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1603 /* Disable and clear all interrupts */
1604 writel(0, host->base + MSDC_INTEN);
1606 val = readl(host->base + MSDC_INT);
1607 writel(val, host->base + MSDC_INT);
1610 /* init gpd and bd list in msdc_drv_probe */
1611 static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma)
1613 struct mt_gpdma_desc *gpd = dma->gpd;
1614 struct mt_bdma_desc *bd = dma->bd;
1615 dma_addr_t dma_addr;
1618 memset(gpd, 0, sizeof(struct mt_gpdma_desc) * 2);
1620 dma_addr = dma->gpd_addr + sizeof(struct mt_gpdma_desc);
1621 gpd->gpd_info = GPDMA_DESC_BDP; /* hwo, cs, bd pointer */
1622 /* gpd->next is must set for desc DMA
1623 * That's why must alloc 2 gpd structure.
1625 gpd->next = lower_32_bits(dma_addr);
1626 if (host->dev_comp->support_64g)
1627 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
1629 dma_addr = dma->bd_addr;
1630 gpd->ptr = lower_32_bits(dma->bd_addr); /* physical address */
1631 if (host->dev_comp->support_64g)
1632 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 28;
1634 memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM);
1635 for (i = 0; i < (MAX_BD_NUM - 1); i++) {
1636 dma_addr = dma->bd_addr + sizeof(*bd) * (i + 1);
1637 bd[i].next = lower_32_bits(dma_addr);
1638 if (host->dev_comp->support_64g)
1639 bd[i].bd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
1643 static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1645 struct msdc_host *host = mmc_priv(mmc);
1648 msdc_set_buswidth(host, ios->bus_width);
1650 /* Suspend/Resume will do power off/on */
1651 switch (ios->power_mode) {
1653 if (!IS_ERR(mmc->supply.vmmc)) {
1655 ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc,
1658 dev_err(host->dev, "Failed to set vmmc power!\n");
1664 if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) {
1665 ret = regulator_enable(mmc->supply.vqmmc);
1667 dev_err(host->dev, "Failed to set vqmmc power!\n");
1669 host->vqmmc_enabled = true;
1673 if (!IS_ERR(mmc->supply.vmmc))
1674 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
1676 if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) {
1677 regulator_disable(mmc->supply.vqmmc);
1678 host->vqmmc_enabled = false;
1685 if (host->mclk != ios->clock || host->timing != ios->timing)
1686 msdc_set_mclk(host, ios->timing, ios->clock);
1689 static u32 test_delay_bit(u32 delay, u32 bit)
1691 bit %= PAD_DELAY_MAX;
1692 return delay & (1 << bit);
1695 static int get_delay_len(u32 delay, u32 start_bit)
1699 for (i = 0; i < (PAD_DELAY_MAX - start_bit); i++) {
1700 if (test_delay_bit(delay, start_bit + i) == 0)
1703 return PAD_DELAY_MAX - start_bit;
1706 static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay)
1708 int start = 0, len = 0;
1709 int start_final = 0, len_final = 0;
1710 u8 final_phase = 0xff;
1711 struct msdc_delay_phase delay_phase = { 0, };
1714 dev_err(host->dev, "phase error: [map:%x]\n", delay);
1715 delay_phase.final_phase = final_phase;
1719 while (start < PAD_DELAY_MAX) {
1720 len = get_delay_len(delay, start);
1721 if (len_final < len) {
1722 start_final = start;
1725 start += len ? len : 1;
1726 if (len >= 12 && start_final < 4)
1730 /* The rule is that to find the smallest delay cell */
1731 if (start_final == 0)
1732 final_phase = (start_final + len_final / 3) % PAD_DELAY_MAX;
1734 final_phase = (start_final + len_final / 2) % PAD_DELAY_MAX;
1735 dev_info(host->dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n",
1736 delay, len_final, final_phase);
1738 delay_phase.maxlen = len_final;
1739 delay_phase.start = start_final;
1740 delay_phase.final_phase = final_phase;
1744 static inline void msdc_set_cmd_delay(struct msdc_host *host, u32 value)
1746 u32 tune_reg = host->dev_comp->pad_tune_reg;
1749 sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY,
1752 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY,
1756 static inline void msdc_set_data_delay(struct msdc_host *host, u32 value)
1758 u32 tune_reg = host->dev_comp->pad_tune_reg;
1761 sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
1762 PAD_DAT_RD_RXDLY, value);
1764 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_DATRRDLY,
1768 static int msdc_tune_response(struct mmc_host *mmc, u32 opcode)
1770 struct msdc_host *host = mmc_priv(mmc);
1771 u32 rise_delay = 0, fall_delay = 0;
1772 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
1773 struct msdc_delay_phase internal_delay_phase;
1774 u8 final_delay, final_maxlen;
1775 u32 internal_delay = 0;
1776 u32 tune_reg = host->dev_comp->pad_tune_reg;
1780 if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
1781 mmc->ios.timing == MMC_TIMING_UHS_SDR104)
1782 sdr_set_field(host->base + tune_reg,
1783 MSDC_PAD_TUNE_CMDRRDLY,
1784 host->hs200_cmd_int_delay);
1786 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1787 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1788 msdc_set_cmd_delay(host, i);
1790 * Using the same parameters, it may sometimes pass the test,
1791 * but sometimes it may fail. To make sure the parameters are
1792 * more stable, we test each set of parameters 3 times.
1794 for (j = 0; j < 3; j++) {
1795 mmc_send_tuning(mmc, opcode, &cmd_err);
1797 rise_delay |= (1 << i);
1799 rise_delay &= ~(1 << i);
1804 final_rise_delay = get_best_delay(host, rise_delay);
1805 /* if rising edge has enough margin, then do not scan falling edge */
1806 if (final_rise_delay.maxlen >= 12 ||
1807 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
1810 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1811 for (i = 0; i < PAD_DELAY_MAX; i++) {
1812 msdc_set_cmd_delay(host, i);
1814 * Using the same parameters, it may sometimes pass the test,
1815 * but sometimes it may fail. To make sure the parameters are
1816 * more stable, we test each set of parameters 3 times.
1818 for (j = 0; j < 3; j++) {
1819 mmc_send_tuning(mmc, opcode, &cmd_err);
1821 fall_delay |= (1 << i);
1823 fall_delay &= ~(1 << i);
1828 final_fall_delay = get_best_delay(host, fall_delay);
1831 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
1832 if (final_fall_delay.maxlen >= 12 && final_fall_delay.start < 4)
1833 final_maxlen = final_fall_delay.maxlen;
1834 if (final_maxlen == final_rise_delay.maxlen) {
1835 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1836 final_delay = final_rise_delay.final_phase;
1838 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1839 final_delay = final_fall_delay.final_phase;
1841 msdc_set_cmd_delay(host, final_delay);
1843 if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay)
1846 for (i = 0; i < PAD_DELAY_MAX; i++) {
1847 sdr_set_field(host->base + tune_reg,
1848 MSDC_PAD_TUNE_CMDRRDLY, i);
1849 mmc_send_tuning(mmc, opcode, &cmd_err);
1851 internal_delay |= (1 << i);
1853 dev_dbg(host->dev, "Final internal delay: 0x%x\n", internal_delay);
1854 internal_delay_phase = get_best_delay(host, internal_delay);
1855 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRRDLY,
1856 internal_delay_phase.final_phase);
1858 dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay);
1859 return final_delay == 0xff ? -EIO : 0;
1862 static int hs400_tune_response(struct mmc_host *mmc, u32 opcode)
1864 struct msdc_host *host = mmc_priv(mmc);
1866 struct msdc_delay_phase final_cmd_delay = { 0,};
1871 /* select EMMC50 PAD CMD tune */
1872 sdr_set_bits(host->base + PAD_CMD_TUNE, BIT(0));
1874 if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
1875 mmc->ios.timing == MMC_TIMING_UHS_SDR104)
1876 sdr_set_field(host->base + MSDC_PAD_TUNE,
1877 MSDC_PAD_TUNE_CMDRRDLY,
1878 host->hs200_cmd_int_delay);
1880 if (host->hs400_cmd_resp_sel_rising)
1881 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1883 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1884 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1885 sdr_set_field(host->base + PAD_CMD_TUNE,
1886 PAD_CMD_TUNE_RX_DLY3, i);
1888 * Using the same parameters, it may sometimes pass the test,
1889 * but sometimes it may fail. To make sure the parameters are
1890 * more stable, we test each set of parameters 3 times.
1892 for (j = 0; j < 3; j++) {
1893 mmc_send_tuning(mmc, opcode, &cmd_err);
1895 cmd_delay |= (1 << i);
1897 cmd_delay &= ~(1 << i);
1902 final_cmd_delay = get_best_delay(host, cmd_delay);
1903 sdr_set_field(host->base + PAD_CMD_TUNE, PAD_CMD_TUNE_RX_DLY3,
1904 final_cmd_delay.final_phase);
1905 final_delay = final_cmd_delay.final_phase;
1907 dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay);
1908 return final_delay == 0xff ? -EIO : 0;
1911 static int msdc_tune_data(struct mmc_host *mmc, u32 opcode)
1913 struct msdc_host *host = mmc_priv(mmc);
1914 u32 rise_delay = 0, fall_delay = 0;
1915 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
1916 u8 final_delay, final_maxlen;
1919 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL,
1921 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1922 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1923 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1924 msdc_set_data_delay(host, i);
1925 ret = mmc_send_tuning(mmc, opcode, NULL);
1927 rise_delay |= (1 << i);
1929 final_rise_delay = get_best_delay(host, rise_delay);
1930 /* if rising edge has enough margin, then do not scan falling edge */
1931 if (final_rise_delay.maxlen >= 12 ||
1932 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
1935 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1936 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1937 for (i = 0; i < PAD_DELAY_MAX; i++) {
1938 msdc_set_data_delay(host, i);
1939 ret = mmc_send_tuning(mmc, opcode, NULL);
1941 fall_delay |= (1 << i);
1943 final_fall_delay = get_best_delay(host, fall_delay);
1946 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
1947 if (final_maxlen == final_rise_delay.maxlen) {
1948 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1949 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1950 final_delay = final_rise_delay.final_phase;
1952 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1953 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1954 final_delay = final_fall_delay.final_phase;
1956 msdc_set_data_delay(host, final_delay);
1958 dev_dbg(host->dev, "Final data pad delay: %x\n", final_delay);
1959 return final_delay == 0xff ? -EIO : 0;
1963 * MSDC IP which supports data tune + async fifo can do CMD/DAT tune
1964 * together, which can save the tuning time.
1966 static int msdc_tune_together(struct mmc_host *mmc, u32 opcode)
1968 struct msdc_host *host = mmc_priv(mmc);
1969 u32 rise_delay = 0, fall_delay = 0;
1970 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
1971 u8 final_delay, final_maxlen;
1974 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL,
1977 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1978 sdr_clr_bits(host->base + MSDC_IOCON,
1979 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
1980 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1981 msdc_set_cmd_delay(host, i);
1982 msdc_set_data_delay(host, i);
1983 ret = mmc_send_tuning(mmc, opcode, NULL);
1985 rise_delay |= (1 << i);
1987 final_rise_delay = get_best_delay(host, rise_delay);
1988 /* if rising edge has enough margin, then do not scan falling edge */
1989 if (final_rise_delay.maxlen >= 12 ||
1990 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
1993 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1994 sdr_set_bits(host->base + MSDC_IOCON,
1995 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
1996 for (i = 0; i < PAD_DELAY_MAX; i++) {
1997 msdc_set_cmd_delay(host, i);
1998 msdc_set_data_delay(host, i);
1999 ret = mmc_send_tuning(mmc, opcode, NULL);
2001 fall_delay |= (1 << i);
2003 final_fall_delay = get_best_delay(host, fall_delay);
2006 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
2007 if (final_maxlen == final_rise_delay.maxlen) {
2008 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2009 sdr_clr_bits(host->base + MSDC_IOCON,
2010 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2011 final_delay = final_rise_delay.final_phase;
2013 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2014 sdr_set_bits(host->base + MSDC_IOCON,
2015 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2016 final_delay = final_fall_delay.final_phase;
2019 msdc_set_cmd_delay(host, final_delay);
2020 msdc_set_data_delay(host, final_delay);
2022 dev_dbg(host->dev, "Final pad delay: %x\n", final_delay);
2023 return final_delay == 0xff ? -EIO : 0;
2026 static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
2028 struct msdc_host *host = mmc_priv(mmc);
2030 u32 tune_reg = host->dev_comp->pad_tune_reg;
2032 if (host->dev_comp->data_tune && host->dev_comp->async_fifo) {
2033 ret = msdc_tune_together(mmc, opcode);
2034 if (host->hs400_mode) {
2035 sdr_clr_bits(host->base + MSDC_IOCON,
2036 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2037 msdc_set_data_delay(host, 0);
2041 if (host->hs400_mode &&
2042 host->dev_comp->hs400_tune)
2043 ret = hs400_tune_response(mmc, opcode);
2045 ret = msdc_tune_response(mmc, opcode);
2047 dev_err(host->dev, "Tune response fail!\n");
2050 if (host->hs400_mode == false) {
2051 ret = msdc_tune_data(mmc, opcode);
2053 dev_err(host->dev, "Tune data fail!\n");
2057 host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
2058 host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
2059 host->saved_tune_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
2060 if (host->top_base) {
2061 host->saved_tune_para.emmc_top_control = readl(host->top_base +
2063 host->saved_tune_para.emmc_top_cmd = readl(host->top_base +
2069 static int msdc_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios)
2071 struct msdc_host *host = mmc_priv(mmc);
2072 host->hs400_mode = true;
2075 writel(host->hs400_ds_delay,
2076 host->top_base + EMMC50_PAD_DS_TUNE);
2078 writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE);
2079 /* hs400 mode must set it to 0 */
2080 sdr_clr_bits(host->base + MSDC_PATCH_BIT2, MSDC_PATCH_BIT2_CFGCRCSTS);
2081 /* to improve read performance, set outstanding to 2 */
2082 sdr_set_field(host->base + EMMC50_CFG3, EMMC50_CFG3_OUTS_WR, 2);
2087 static void msdc_hw_reset(struct mmc_host *mmc)
2089 struct msdc_host *host = mmc_priv(mmc);
2091 sdr_set_bits(host->base + EMMC_IOCON, 1);
2092 udelay(10); /* 10us is enough */
2093 sdr_clr_bits(host->base + EMMC_IOCON, 1);
2096 static void msdc_ack_sdio_irq(struct mmc_host *mmc)
2098 __msdc_enable_sdio_irq(mmc, 1);
2101 static int msdc_get_cd(struct mmc_host *mmc)
2103 struct msdc_host *host = mmc_priv(mmc);
2106 if (mmc->caps & MMC_CAP_NONREMOVABLE)
2109 if (!host->internal_cd)
2110 return mmc_gpio_get_cd(mmc);
2112 val = readl(host->base + MSDC_PS) & MSDC_PS_CDSTS;
2113 if (mmc->caps2 & MMC_CAP2_CD_ACTIVE_HIGH)
2119 static const struct mmc_host_ops mt_msdc_ops = {
2120 .post_req = msdc_post_req,
2121 .pre_req = msdc_pre_req,
2122 .request = msdc_ops_request,
2123 .set_ios = msdc_ops_set_ios,
2124 .get_ro = mmc_gpio_get_ro,
2125 .get_cd = msdc_get_cd,
2126 .enable_sdio_irq = msdc_enable_sdio_irq,
2127 .ack_sdio_irq = msdc_ack_sdio_irq,
2128 .start_signal_voltage_switch = msdc_ops_switch_volt,
2129 .card_busy = msdc_card_busy,
2130 .execute_tuning = msdc_execute_tuning,
2131 .prepare_hs400_tuning = msdc_prepare_hs400_tuning,
2132 .hw_reset = msdc_hw_reset,
2135 static void msdc_of_property_parse(struct platform_device *pdev,
2136 struct msdc_host *host)
2138 of_property_read_u32(pdev->dev.of_node, "mediatek,latch-ck",
2141 of_property_read_u32(pdev->dev.of_node, "hs400-ds-delay",
2142 &host->hs400_ds_delay);
2144 of_property_read_u32(pdev->dev.of_node, "mediatek,hs200-cmd-int-delay",
2145 &host->hs200_cmd_int_delay);
2147 of_property_read_u32(pdev->dev.of_node, "mediatek,hs400-cmd-int-delay",
2148 &host->hs400_cmd_int_delay);
2150 if (of_property_read_bool(pdev->dev.of_node,
2151 "mediatek,hs400-cmd-resp-sel-rising"))
2152 host->hs400_cmd_resp_sel_rising = true;
2154 host->hs400_cmd_resp_sel_rising = false;
2157 static int msdc_drv_probe(struct platform_device *pdev)
2159 struct mmc_host *mmc;
2160 struct msdc_host *host;
2161 struct resource *res;
2164 if (!pdev->dev.of_node) {
2165 dev_err(&pdev->dev, "No DT found\n");
2169 /* Allocate MMC host for this device */
2170 mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev);
2174 host = mmc_priv(mmc);
2175 ret = mmc_of_parse(mmc);
2179 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2180 host->base = devm_ioremap_resource(&pdev->dev, res);
2181 if (IS_ERR(host->base)) {
2182 ret = PTR_ERR(host->base);
2186 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2188 host->top_base = devm_ioremap_resource(&pdev->dev, res);
2189 if (IS_ERR(host->top_base))
2190 host->top_base = NULL;
2193 ret = mmc_regulator_get_supply(mmc);
2197 host->src_clk = devm_clk_get(&pdev->dev, "source");
2198 if (IS_ERR(host->src_clk)) {
2199 ret = PTR_ERR(host->src_clk);
2203 host->h_clk = devm_clk_get(&pdev->dev, "hclk");
2204 if (IS_ERR(host->h_clk)) {
2205 ret = PTR_ERR(host->h_clk);
2209 host->bus_clk = devm_clk_get(&pdev->dev, "bus_clk");
2210 if (IS_ERR(host->bus_clk))
2211 host->bus_clk = NULL;
2212 /*source clock control gate is optional clock*/
2213 host->src_clk_cg = devm_clk_get(&pdev->dev, "source_cg");
2214 if (IS_ERR(host->src_clk_cg))
2215 host->src_clk_cg = NULL;
2217 host->irq = platform_get_irq(pdev, 0);
2218 if (host->irq < 0) {
2223 host->pinctrl = devm_pinctrl_get(&pdev->dev);
2224 if (IS_ERR(host->pinctrl)) {
2225 ret = PTR_ERR(host->pinctrl);
2226 dev_err(&pdev->dev, "Cannot find pinctrl!\n");
2230 host->pins_default = pinctrl_lookup_state(host->pinctrl, "default");
2231 if (IS_ERR(host->pins_default)) {
2232 ret = PTR_ERR(host->pins_default);
2233 dev_err(&pdev->dev, "Cannot find pinctrl default!\n");
2237 host->pins_uhs = pinctrl_lookup_state(host->pinctrl, "state_uhs");
2238 if (IS_ERR(host->pins_uhs)) {
2239 ret = PTR_ERR(host->pins_uhs);
2240 dev_err(&pdev->dev, "Cannot find pinctrl uhs!\n");
2244 msdc_of_property_parse(pdev, host);
2246 host->dev = &pdev->dev;
2247 host->dev_comp = of_device_get_match_data(&pdev->dev);
2249 host->src_clk_freq = clk_get_rate(host->src_clk);
2250 /* Set host parameters to mmc */
2251 mmc->ops = &mt_msdc_ops;
2252 if (host->dev_comp->clk_div_bits == 8)
2253 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 255);
2255 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 4095);
2257 if (!(mmc->caps & MMC_CAP_NONREMOVABLE) &&
2258 !mmc_can_gpio_cd(mmc) &&
2259 host->dev_comp->use_internal_cd) {
2261 * Is removable but no GPIO declared, so
2262 * use internal functionality.
2264 host->internal_cd = true;
2267 if (mmc->caps & MMC_CAP_SDIO_IRQ)
2268 mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
2270 mmc->caps |= MMC_CAP_ERASE | MMC_CAP_CMD23;
2271 /* MMC core transfer sizes tunable parameters */
2272 mmc->max_segs = MAX_BD_NUM;
2273 mmc->max_seg_size = BDMA_DESC_BUFLEN;
2274 mmc->max_blk_size = 2048;
2275 mmc->max_req_size = 512 * 1024;
2276 mmc->max_blk_count = mmc->max_req_size / 512;
2277 if (host->dev_comp->support_64g)
2278 host->dma_mask = DMA_BIT_MASK(36);
2280 host->dma_mask = DMA_BIT_MASK(32);
2281 mmc_dev(mmc)->dma_mask = &host->dma_mask;
2283 host->timeout_clks = 3 * 1048576;
2284 host->dma.gpd = dma_alloc_coherent(&pdev->dev,
2285 2 * sizeof(struct mt_gpdma_desc),
2286 &host->dma.gpd_addr, GFP_KERNEL);
2287 host->dma.bd = dma_alloc_coherent(&pdev->dev,
2288 MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2289 &host->dma.bd_addr, GFP_KERNEL);
2290 if (!host->dma.gpd || !host->dma.bd) {
2294 msdc_init_gpd_bd(host, &host->dma);
2295 INIT_DELAYED_WORK(&host->req_timeout, msdc_request_timeout);
2296 spin_lock_init(&host->lock);
2298 platform_set_drvdata(pdev, mmc);
2299 msdc_ungate_clock(host);
2302 ret = devm_request_irq(&pdev->dev, host->irq, msdc_irq,
2303 IRQF_TRIGGER_NONE, pdev->name, host);
2307 pm_runtime_set_active(host->dev);
2308 pm_runtime_set_autosuspend_delay(host->dev, MTK_MMC_AUTOSUSPEND_DELAY);
2309 pm_runtime_use_autosuspend(host->dev);
2310 pm_runtime_enable(host->dev);
2311 ret = mmc_add_host(mmc);
2318 pm_runtime_disable(host->dev);
2320 platform_set_drvdata(pdev, NULL);
2321 msdc_deinit_hw(host);
2322 msdc_gate_clock(host);
2325 dma_free_coherent(&pdev->dev,
2326 2 * sizeof(struct mt_gpdma_desc),
2327 host->dma.gpd, host->dma.gpd_addr);
2329 dma_free_coherent(&pdev->dev,
2330 MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2331 host->dma.bd, host->dma.bd_addr);
2338 static int msdc_drv_remove(struct platform_device *pdev)
2340 struct mmc_host *mmc;
2341 struct msdc_host *host;
2343 mmc = platform_get_drvdata(pdev);
2344 host = mmc_priv(mmc);
2346 pm_runtime_get_sync(host->dev);
2348 platform_set_drvdata(pdev, NULL);
2349 mmc_remove_host(host->mmc);
2350 msdc_deinit_hw(host);
2351 msdc_gate_clock(host);
2353 pm_runtime_disable(host->dev);
2354 pm_runtime_put_noidle(host->dev);
2355 dma_free_coherent(&pdev->dev,
2356 2 * sizeof(struct mt_gpdma_desc),
2357 host->dma.gpd, host->dma.gpd_addr);
2358 dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2359 host->dma.bd, host->dma.bd_addr);
2361 mmc_free_host(host->mmc);
2367 static void msdc_save_reg(struct msdc_host *host)
2369 u32 tune_reg = host->dev_comp->pad_tune_reg;
2371 host->save_para.msdc_cfg = readl(host->base + MSDC_CFG);
2372 host->save_para.iocon = readl(host->base + MSDC_IOCON);
2373 host->save_para.sdc_cfg = readl(host->base + SDC_CFG);
2374 host->save_para.patch_bit0 = readl(host->base + MSDC_PATCH_BIT);
2375 host->save_para.patch_bit1 = readl(host->base + MSDC_PATCH_BIT1);
2376 host->save_para.patch_bit2 = readl(host->base + MSDC_PATCH_BIT2);
2377 host->save_para.pad_ds_tune = readl(host->base + PAD_DS_TUNE);
2378 host->save_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
2379 host->save_para.emmc50_cfg0 = readl(host->base + EMMC50_CFG0);
2380 host->save_para.emmc50_cfg3 = readl(host->base + EMMC50_CFG3);
2381 host->save_para.sdc_fifo_cfg = readl(host->base + SDC_FIFO_CFG);
2382 if (host->top_base) {
2383 host->save_para.emmc_top_control =
2384 readl(host->top_base + EMMC_TOP_CONTROL);
2385 host->save_para.emmc_top_cmd =
2386 readl(host->top_base + EMMC_TOP_CMD);
2387 host->save_para.emmc50_pad_ds_tune =
2388 readl(host->top_base + EMMC50_PAD_DS_TUNE);
2390 host->save_para.pad_tune = readl(host->base + tune_reg);
2394 static void msdc_restore_reg(struct msdc_host *host)
2396 u32 tune_reg = host->dev_comp->pad_tune_reg;
2398 writel(host->save_para.msdc_cfg, host->base + MSDC_CFG);
2399 writel(host->save_para.iocon, host->base + MSDC_IOCON);
2400 writel(host->save_para.sdc_cfg, host->base + SDC_CFG);
2401 writel(host->save_para.patch_bit0, host->base + MSDC_PATCH_BIT);
2402 writel(host->save_para.patch_bit1, host->base + MSDC_PATCH_BIT1);
2403 writel(host->save_para.patch_bit2, host->base + MSDC_PATCH_BIT2);
2404 writel(host->save_para.pad_ds_tune, host->base + PAD_DS_TUNE);
2405 writel(host->save_para.pad_cmd_tune, host->base + PAD_CMD_TUNE);
2406 writel(host->save_para.emmc50_cfg0, host->base + EMMC50_CFG0);
2407 writel(host->save_para.emmc50_cfg3, host->base + EMMC50_CFG3);
2408 writel(host->save_para.sdc_fifo_cfg, host->base + SDC_FIFO_CFG);
2409 if (host->top_base) {
2410 writel(host->save_para.emmc_top_control,
2411 host->top_base + EMMC_TOP_CONTROL);
2412 writel(host->save_para.emmc_top_cmd,
2413 host->top_base + EMMC_TOP_CMD);
2414 writel(host->save_para.emmc50_pad_ds_tune,
2415 host->top_base + EMMC50_PAD_DS_TUNE);
2417 writel(host->save_para.pad_tune, host->base + tune_reg);
2421 static int msdc_runtime_suspend(struct device *dev)
2423 struct mmc_host *mmc = dev_get_drvdata(dev);
2424 struct msdc_host *host = mmc_priv(mmc);
2426 msdc_save_reg(host);
2427 msdc_gate_clock(host);
2431 static int msdc_runtime_resume(struct device *dev)
2433 struct mmc_host *mmc = dev_get_drvdata(dev);
2434 struct msdc_host *host = mmc_priv(mmc);
2436 msdc_ungate_clock(host);
2437 msdc_restore_reg(host);
2442 static const struct dev_pm_ops msdc_dev_pm_ops = {
2443 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
2444 pm_runtime_force_resume)
2445 SET_RUNTIME_PM_OPS(msdc_runtime_suspend, msdc_runtime_resume, NULL)
2448 static struct platform_driver mt_msdc_driver = {
2449 .probe = msdc_drv_probe,
2450 .remove = msdc_drv_remove,
2453 .of_match_table = msdc_of_ids,
2454 .pm = &msdc_dev_pm_ops,
2458 module_platform_driver(mt_msdc_driver);
2459 MODULE_LICENSE("GPL v2");
2460 MODULE_DESCRIPTION("MediaTek SD/MMC Card Driver");