]>
Commit | Line | Data |
---|---|---|
20848903 CJ |
1 | /* |
2 | * Copyright (c) 2014-2015 MediaTek Inc. | |
3 | * Author: Chaotian.Jing <chaotian.jing@mediatek.com> | |
4 | * | |
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. | |
8 | * | |
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. | |
13 | */ | |
14 | ||
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_irq.h> | |
23 | #include <linux/of_gpio.h> | |
24 | #include <linux/pinctrl/consumer.h> | |
25 | #include <linux/platform_device.h> | |
4b8a43e9 CJ |
26 | #include <linux/pm.h> |
27 | #include <linux/pm_runtime.h> | |
20848903 | 28 | #include <linux/regulator/consumer.h> |
6397b7f5 | 29 | #include <linux/slab.h> |
20848903 | 30 | #include <linux/spinlock.h> |
b8789ec4 | 31 | #include <linux/interrupt.h> |
20848903 CJ |
32 | |
33 | #include <linux/mmc/card.h> | |
34 | #include <linux/mmc/core.h> | |
35 | #include <linux/mmc/host.h> | |
36 | #include <linux/mmc/mmc.h> | |
37 | #include <linux/mmc/sd.h> | |
38 | #include <linux/mmc/sdio.h> | |
8d53e412 | 39 | #include <linux/mmc/slot-gpio.h> |
20848903 CJ |
40 | |
41 | #define MAX_BD_NUM 1024 | |
42 | ||
43 | /*--------------------------------------------------------------------------*/ | |
44 | /* Common Definition */ | |
45 | /*--------------------------------------------------------------------------*/ | |
46 | #define MSDC_BUS_1BITS 0x0 | |
47 | #define MSDC_BUS_4BITS 0x1 | |
48 | #define MSDC_BUS_8BITS 0x2 | |
49 | ||
50 | #define MSDC_BURST_64B 0x6 | |
51 | ||
52 | /*--------------------------------------------------------------------------*/ | |
53 | /* Register Offset */ | |
54 | /*--------------------------------------------------------------------------*/ | |
55 | #define MSDC_CFG 0x0 | |
56 | #define MSDC_IOCON 0x04 | |
57 | #define MSDC_PS 0x08 | |
58 | #define MSDC_INT 0x0c | |
59 | #define MSDC_INTEN 0x10 | |
60 | #define MSDC_FIFOCS 0x14 | |
61 | #define SDC_CFG 0x30 | |
62 | #define SDC_CMD 0x34 | |
63 | #define SDC_ARG 0x38 | |
64 | #define SDC_STS 0x3c | |
65 | #define SDC_RESP0 0x40 | |
66 | #define SDC_RESP1 0x44 | |
67 | #define SDC_RESP2 0x48 | |
68 | #define SDC_RESP3 0x4c | |
69 | #define SDC_BLK_NUM 0x50 | |
c9b5061e | 70 | #define EMMC_IOCON 0x7c |
20848903 CJ |
71 | #define SDC_ACMD_RESP 0x80 |
72 | #define MSDC_DMA_SA 0x90 | |
73 | #define MSDC_DMA_CTRL 0x98 | |
74 | #define MSDC_DMA_CFG 0x9c | |
75 | #define MSDC_PATCH_BIT 0xb0 | |
76 | #define MSDC_PATCH_BIT1 0xb4 | |
77 | #define MSDC_PAD_TUNE 0xec | |
6397b7f5 CJ |
78 | #define PAD_DS_TUNE 0x188 |
79 | #define EMMC50_CFG0 0x208 | |
20848903 CJ |
80 | |
81 | /*--------------------------------------------------------------------------*/ | |
82 | /* Register Mask */ | |
83 | /*--------------------------------------------------------------------------*/ | |
84 | ||
85 | /* MSDC_CFG mask */ | |
86 | #define MSDC_CFG_MODE (0x1 << 0) /* RW */ | |
87 | #define MSDC_CFG_CKPDN (0x1 << 1) /* RW */ | |
88 | #define MSDC_CFG_RST (0x1 << 2) /* RW */ | |
89 | #define MSDC_CFG_PIO (0x1 << 3) /* RW */ | |
90 | #define MSDC_CFG_CKDRVEN (0x1 << 4) /* RW */ | |
91 | #define MSDC_CFG_BV18SDT (0x1 << 5) /* RW */ | |
92 | #define MSDC_CFG_BV18PSS (0x1 << 6) /* R */ | |
93 | #define MSDC_CFG_CKSTB (0x1 << 7) /* R */ | |
94 | #define MSDC_CFG_CKDIV (0xff << 8) /* RW */ | |
95 | #define MSDC_CFG_CKMOD (0x3 << 16) /* RW */ | |
6397b7f5 | 96 | #define MSDC_CFG_HS400_CK_MODE (0x1 << 18) /* RW */ |
20848903 CJ |
97 | |
98 | /* MSDC_IOCON mask */ | |
99 | #define MSDC_IOCON_SDR104CKS (0x1 << 0) /* RW */ | |
100 | #define MSDC_IOCON_RSPL (0x1 << 1) /* RW */ | |
101 | #define MSDC_IOCON_DSPL (0x1 << 2) /* RW */ | |
102 | #define MSDC_IOCON_DDLSEL (0x1 << 3) /* RW */ | |
103 | #define MSDC_IOCON_DDR50CKD (0x1 << 4) /* RW */ | |
104 | #define MSDC_IOCON_DSPLSEL (0x1 << 5) /* RW */ | |
105 | #define MSDC_IOCON_W_DSPL (0x1 << 8) /* RW */ | |
106 | #define MSDC_IOCON_D0SPL (0x1 << 16) /* RW */ | |
107 | #define MSDC_IOCON_D1SPL (0x1 << 17) /* RW */ | |
108 | #define MSDC_IOCON_D2SPL (0x1 << 18) /* RW */ | |
109 | #define MSDC_IOCON_D3SPL (0x1 << 19) /* RW */ | |
110 | #define MSDC_IOCON_D4SPL (0x1 << 20) /* RW */ | |
111 | #define MSDC_IOCON_D5SPL (0x1 << 21) /* RW */ | |
112 | #define MSDC_IOCON_D6SPL (0x1 << 22) /* RW */ | |
113 | #define MSDC_IOCON_D7SPL (0x1 << 23) /* RW */ | |
114 | #define MSDC_IOCON_RISCSZ (0x3 << 24) /* RW */ | |
115 | ||
116 | /* MSDC_PS mask */ | |
117 | #define MSDC_PS_CDEN (0x1 << 0) /* RW */ | |
118 | #define MSDC_PS_CDSTS (0x1 << 1) /* R */ | |
119 | #define MSDC_PS_CDDEBOUNCE (0xf << 12) /* RW */ | |
120 | #define MSDC_PS_DAT (0xff << 16) /* R */ | |
121 | #define MSDC_PS_CMD (0x1 << 24) /* R */ | |
122 | #define MSDC_PS_WP (0x1 << 31) /* R */ | |
123 | ||
124 | /* MSDC_INT mask */ | |
125 | #define MSDC_INT_MMCIRQ (0x1 << 0) /* W1C */ | |
126 | #define MSDC_INT_CDSC (0x1 << 1) /* W1C */ | |
127 | #define MSDC_INT_ACMDRDY (0x1 << 3) /* W1C */ | |
128 | #define MSDC_INT_ACMDTMO (0x1 << 4) /* W1C */ | |
129 | #define MSDC_INT_ACMDCRCERR (0x1 << 5) /* W1C */ | |
130 | #define MSDC_INT_DMAQ_EMPTY (0x1 << 6) /* W1C */ | |
131 | #define MSDC_INT_SDIOIRQ (0x1 << 7) /* W1C */ | |
132 | #define MSDC_INT_CMDRDY (0x1 << 8) /* W1C */ | |
133 | #define MSDC_INT_CMDTMO (0x1 << 9) /* W1C */ | |
134 | #define MSDC_INT_RSPCRCERR (0x1 << 10) /* W1C */ | |
135 | #define MSDC_INT_CSTA (0x1 << 11) /* R */ | |
136 | #define MSDC_INT_XFER_COMPL (0x1 << 12) /* W1C */ | |
137 | #define MSDC_INT_DXFER_DONE (0x1 << 13) /* W1C */ | |
138 | #define MSDC_INT_DATTMO (0x1 << 14) /* W1C */ | |
139 | #define MSDC_INT_DATCRCERR (0x1 << 15) /* W1C */ | |
140 | #define MSDC_INT_ACMD19_DONE (0x1 << 16) /* W1C */ | |
141 | #define MSDC_INT_DMA_BDCSERR (0x1 << 17) /* W1C */ | |
142 | #define MSDC_INT_DMA_GPDCSERR (0x1 << 18) /* W1C */ | |
143 | #define MSDC_INT_DMA_PROTECT (0x1 << 19) /* W1C */ | |
144 | ||
145 | /* MSDC_INTEN mask */ | |
146 | #define MSDC_INTEN_MMCIRQ (0x1 << 0) /* RW */ | |
147 | #define MSDC_INTEN_CDSC (0x1 << 1) /* RW */ | |
148 | #define MSDC_INTEN_ACMDRDY (0x1 << 3) /* RW */ | |
149 | #define MSDC_INTEN_ACMDTMO (0x1 << 4) /* RW */ | |
150 | #define MSDC_INTEN_ACMDCRCERR (0x1 << 5) /* RW */ | |
151 | #define MSDC_INTEN_DMAQ_EMPTY (0x1 << 6) /* RW */ | |
152 | #define MSDC_INTEN_SDIOIRQ (0x1 << 7) /* RW */ | |
153 | #define MSDC_INTEN_CMDRDY (0x1 << 8) /* RW */ | |
154 | #define MSDC_INTEN_CMDTMO (0x1 << 9) /* RW */ | |
155 | #define MSDC_INTEN_RSPCRCERR (0x1 << 10) /* RW */ | |
156 | #define MSDC_INTEN_CSTA (0x1 << 11) /* RW */ | |
157 | #define MSDC_INTEN_XFER_COMPL (0x1 << 12) /* RW */ | |
158 | #define MSDC_INTEN_DXFER_DONE (0x1 << 13) /* RW */ | |
159 | #define MSDC_INTEN_DATTMO (0x1 << 14) /* RW */ | |
160 | #define MSDC_INTEN_DATCRCERR (0x1 << 15) /* RW */ | |
161 | #define MSDC_INTEN_ACMD19_DONE (0x1 << 16) /* RW */ | |
162 | #define MSDC_INTEN_DMA_BDCSERR (0x1 << 17) /* RW */ | |
163 | #define MSDC_INTEN_DMA_GPDCSERR (0x1 << 18) /* RW */ | |
164 | #define MSDC_INTEN_DMA_PROTECT (0x1 << 19) /* RW */ | |
165 | ||
166 | /* MSDC_FIFOCS mask */ | |
167 | #define MSDC_FIFOCS_RXCNT (0xff << 0) /* R */ | |
168 | #define MSDC_FIFOCS_TXCNT (0xff << 16) /* R */ | |
169 | #define MSDC_FIFOCS_CLR (0x1 << 31) /* RW */ | |
170 | ||
171 | /* SDC_CFG mask */ | |
172 | #define SDC_CFG_SDIOINTWKUP (0x1 << 0) /* RW */ | |
173 | #define SDC_CFG_INSWKUP (0x1 << 1) /* RW */ | |
174 | #define SDC_CFG_BUSWIDTH (0x3 << 16) /* RW */ | |
175 | #define SDC_CFG_SDIO (0x1 << 19) /* RW */ | |
176 | #define SDC_CFG_SDIOIDE (0x1 << 20) /* RW */ | |
177 | #define SDC_CFG_INTATGAP (0x1 << 21) /* RW */ | |
178 | #define SDC_CFG_DTOC (0xff << 24) /* RW */ | |
179 | ||
180 | /* SDC_STS mask */ | |
181 | #define SDC_STS_SDCBUSY (0x1 << 0) /* RW */ | |
182 | #define SDC_STS_CMDBUSY (0x1 << 1) /* RW */ | |
183 | #define SDC_STS_SWR_COMPL (0x1 << 31) /* RW */ | |
184 | ||
185 | /* MSDC_DMA_CTRL mask */ | |
186 | #define MSDC_DMA_CTRL_START (0x1 << 0) /* W */ | |
187 | #define MSDC_DMA_CTRL_STOP (0x1 << 1) /* W */ | |
188 | #define MSDC_DMA_CTRL_RESUME (0x1 << 2) /* W */ | |
189 | #define MSDC_DMA_CTRL_MODE (0x1 << 8) /* RW */ | |
190 | #define MSDC_DMA_CTRL_LASTBUF (0x1 << 10) /* RW */ | |
191 | #define MSDC_DMA_CTRL_BRUSTSZ (0x7 << 12) /* RW */ | |
192 | ||
193 | /* MSDC_DMA_CFG mask */ | |
194 | #define MSDC_DMA_CFG_STS (0x1 << 0) /* R */ | |
195 | #define MSDC_DMA_CFG_DECSEN (0x1 << 1) /* RW */ | |
196 | #define MSDC_DMA_CFG_AHBHPROT2 (0x2 << 8) /* RW */ | |
197 | #define MSDC_DMA_CFG_ACTIVEEN (0x2 << 12) /* RW */ | |
198 | #define MSDC_DMA_CFG_CS12B16B (0x1 << 16) /* RW */ | |
199 | ||
200 | /* MSDC_PATCH_BIT mask */ | |
201 | #define MSDC_PATCH_BIT_ODDSUPP (0x1 << 1) /* RW */ | |
202 | #define MSDC_INT_DAT_LATCH_CK_SEL (0x7 << 7) | |
203 | #define MSDC_CKGEN_MSDC_DLY_SEL (0x1f << 10) | |
204 | #define MSDC_PATCH_BIT_IODSSEL (0x1 << 16) /* RW */ | |
205 | #define MSDC_PATCH_BIT_IOINTSEL (0x1 << 17) /* RW */ | |
206 | #define MSDC_PATCH_BIT_BUSYDLY (0xf << 18) /* RW */ | |
207 | #define MSDC_PATCH_BIT_WDOD (0xf << 22) /* RW */ | |
208 | #define MSDC_PATCH_BIT_IDRTSEL (0x1 << 26) /* RW */ | |
209 | #define MSDC_PATCH_BIT_CMDFSEL (0x1 << 27) /* RW */ | |
210 | #define MSDC_PATCH_BIT_INTDLSEL (0x1 << 28) /* RW */ | |
211 | #define MSDC_PATCH_BIT_SPCPUSH (0x1 << 29) /* RW */ | |
212 | #define MSDC_PATCH_BIT_DECRCTMO (0x1 << 30) /* RW */ | |
213 | ||
6397b7f5 CJ |
214 | #define MSDC_PAD_TUNE_DATRRDLY (0x1f << 8) /* RW */ |
215 | #define MSDC_PAD_TUNE_CMDRDLY (0x1f << 16) /* RW */ | |
216 | ||
217 | #define PAD_DS_TUNE_DLY1 (0x1f << 2) /* RW */ | |
218 | #define PAD_DS_TUNE_DLY2 (0x1f << 7) /* RW */ | |
219 | #define PAD_DS_TUNE_DLY3 (0x1f << 12) /* RW */ | |
220 | ||
221 | #define EMMC50_CFG_PADCMD_LATCHCK (0x1 << 0) /* RW */ | |
222 | #define EMMC50_CFG_CRCSTS_EDGE (0x1 << 3) /* RW */ | |
223 | #define EMMC50_CFG_CFCSTS_SEL (0x1 << 4) /* RW */ | |
224 | ||
20848903 CJ |
225 | #define REQ_CMD_EIO (0x1 << 0) |
226 | #define REQ_CMD_TMO (0x1 << 1) | |
227 | #define REQ_DAT_ERR (0x1 << 2) | |
228 | #define REQ_STOP_EIO (0x1 << 3) | |
229 | #define REQ_STOP_TMO (0x1 << 4) | |
230 | #define REQ_CMD_BUSY (0x1 << 5) | |
231 | ||
232 | #define MSDC_PREPARE_FLAG (0x1 << 0) | |
233 | #define MSDC_ASYNC_FLAG (0x1 << 1) | |
234 | #define MSDC_MMAP_FLAG (0x1 << 2) | |
235 | ||
4b8a43e9 | 236 | #define MTK_MMC_AUTOSUSPEND_DELAY 50 |
20848903 CJ |
237 | #define CMD_TIMEOUT (HZ/10 * 5) /* 100ms x5 */ |
238 | #define DAT_TIMEOUT (HZ * 5) /* 1000ms x5 */ | |
239 | ||
6397b7f5 | 240 | #define PAD_DELAY_MAX 32 /* PAD delay cells */ |
20848903 CJ |
241 | /*--------------------------------------------------------------------------*/ |
242 | /* Descriptor Structure */ | |
243 | /*--------------------------------------------------------------------------*/ | |
244 | struct mt_gpdma_desc { | |
245 | u32 gpd_info; | |
246 | #define GPDMA_DESC_HWO (0x1 << 0) | |
247 | #define GPDMA_DESC_BDP (0x1 << 1) | |
248 | #define GPDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */ | |
249 | #define GPDMA_DESC_INT (0x1 << 16) | |
250 | u32 next; | |
251 | u32 ptr; | |
252 | u32 gpd_data_len; | |
253 | #define GPDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */ | |
254 | #define GPDMA_DESC_EXTLEN (0xff << 16) /* bit16 ~ bit23 */ | |
255 | u32 arg; | |
256 | u32 blknum; | |
257 | u32 cmd; | |
258 | }; | |
259 | ||
260 | struct mt_bdma_desc { | |
261 | u32 bd_info; | |
262 | #define BDMA_DESC_EOL (0x1 << 0) | |
263 | #define BDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */ | |
264 | #define BDMA_DESC_BLKPAD (0x1 << 17) | |
265 | #define BDMA_DESC_DWPAD (0x1 << 18) | |
266 | u32 next; | |
267 | u32 ptr; | |
268 | u32 bd_data_len; | |
269 | #define BDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */ | |
270 | }; | |
271 | ||
272 | struct msdc_dma { | |
273 | struct scatterlist *sg; /* I/O scatter list */ | |
274 | struct mt_gpdma_desc *gpd; /* pointer to gpd array */ | |
275 | struct mt_bdma_desc *bd; /* pointer to bd array */ | |
276 | dma_addr_t gpd_addr; /* the physical address of gpd array */ | |
277 | dma_addr_t bd_addr; /* the physical address of bd array */ | |
278 | }; | |
279 | ||
4b8a43e9 CJ |
280 | struct msdc_save_para { |
281 | u32 msdc_cfg; | |
282 | u32 iocon; | |
283 | u32 sdc_cfg; | |
284 | u32 pad_tune; | |
285 | u32 patch_bit0; | |
286 | u32 patch_bit1; | |
6397b7f5 CJ |
287 | u32 pad_ds_tune; |
288 | u32 emmc50_cfg0; | |
289 | }; | |
290 | ||
86beac37 CJ |
291 | struct msdc_tune_para { |
292 | u32 iocon; | |
293 | u32 pad_tune; | |
294 | }; | |
295 | ||
6397b7f5 CJ |
296 | struct msdc_delay_phase { |
297 | u8 maxlen; | |
298 | u8 start; | |
299 | u8 final_phase; | |
4b8a43e9 CJ |
300 | }; |
301 | ||
20848903 CJ |
302 | struct msdc_host { |
303 | struct device *dev; | |
304 | struct mmc_host *mmc; /* mmc structure */ | |
305 | int cmd_rsp; | |
306 | ||
307 | spinlock_t lock; | |
308 | struct mmc_request *mrq; | |
309 | struct mmc_command *cmd; | |
310 | struct mmc_data *data; | |
311 | int error; | |
312 | ||
313 | void __iomem *base; /* host base address */ | |
314 | ||
315 | struct msdc_dma dma; /* dma channel */ | |
316 | u64 dma_mask; | |
317 | ||
318 | u32 timeout_ns; /* data timeout ns */ | |
319 | u32 timeout_clks; /* data timeout clks */ | |
320 | ||
321 | struct pinctrl *pinctrl; | |
322 | struct pinctrl_state *pins_default; | |
323 | struct pinctrl_state *pins_uhs; | |
324 | struct delayed_work req_timeout; | |
325 | int irq; /* host interrupt */ | |
326 | ||
327 | struct clk *src_clk; /* msdc source clock */ | |
328 | struct clk *h_clk; /* msdc h_clk */ | |
329 | u32 mclk; /* mmc subsystem clock frequency */ | |
330 | u32 src_clk_freq; /* source clock frequency */ | |
331 | u32 sclk; /* SD/MS bus clock frequency */ | |
6e622947 | 332 | unsigned char timing; |
20848903 | 333 | bool vqmmc_enabled; |
6397b7f5 | 334 | u32 hs400_ds_delay; |
5462ff39 | 335 | bool hs400_mode; /* current eMMC will run at hs400 mode */ |
4b8a43e9 | 336 | struct msdc_save_para save_para; /* used when gate HCLK */ |
86beac37 CJ |
337 | struct msdc_tune_para def_tune_para; /* default tune setting */ |
338 | struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */ | |
20848903 CJ |
339 | }; |
340 | ||
341 | static void sdr_set_bits(void __iomem *reg, u32 bs) | |
342 | { | |
343 | u32 val = readl(reg); | |
344 | ||
345 | val |= bs; | |
346 | writel(val, reg); | |
347 | } | |
348 | ||
349 | static void sdr_clr_bits(void __iomem *reg, u32 bs) | |
350 | { | |
351 | u32 val = readl(reg); | |
352 | ||
353 | val &= ~bs; | |
354 | writel(val, reg); | |
355 | } | |
356 | ||
357 | static void sdr_set_field(void __iomem *reg, u32 field, u32 val) | |
358 | { | |
359 | unsigned int tv = readl(reg); | |
360 | ||
361 | tv &= ~field; | |
362 | tv |= ((val) << (ffs((unsigned int)field) - 1)); | |
363 | writel(tv, reg); | |
364 | } | |
365 | ||
366 | static void sdr_get_field(void __iomem *reg, u32 field, u32 *val) | |
367 | { | |
368 | unsigned int tv = readl(reg); | |
369 | ||
370 | *val = ((tv & field) >> (ffs((unsigned int)field) - 1)); | |
371 | } | |
372 | ||
373 | static void msdc_reset_hw(struct msdc_host *host) | |
374 | { | |
375 | u32 val; | |
376 | ||
377 | sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_RST); | |
378 | while (readl(host->base + MSDC_CFG) & MSDC_CFG_RST) | |
379 | cpu_relax(); | |
380 | ||
381 | sdr_set_bits(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR); | |
382 | while (readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_CLR) | |
383 | cpu_relax(); | |
384 | ||
385 | val = readl(host->base + MSDC_INT); | |
386 | writel(val, host->base + MSDC_INT); | |
387 | } | |
388 | ||
389 | static void msdc_cmd_next(struct msdc_host *host, | |
390 | struct mmc_request *mrq, struct mmc_command *cmd); | |
391 | ||
726a9aac CJ |
392 | static const u32 cmd_ints_mask = MSDC_INTEN_CMDRDY | MSDC_INTEN_RSPCRCERR | |
393 | MSDC_INTEN_CMDTMO | MSDC_INTEN_ACMDRDY | | |
394 | MSDC_INTEN_ACMDCRCERR | MSDC_INTEN_ACMDTMO; | |
395 | static const u32 data_ints_mask = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO | | |
20848903 CJ |
396 | MSDC_INTEN_DATCRCERR | MSDC_INTEN_DMA_BDCSERR | |
397 | MSDC_INTEN_DMA_GPDCSERR | MSDC_INTEN_DMA_PROTECT; | |
398 | ||
399 | static u8 msdc_dma_calcs(u8 *buf, u32 len) | |
400 | { | |
401 | u32 i, sum = 0; | |
402 | ||
403 | for (i = 0; i < len; i++) | |
404 | sum += buf[i]; | |
405 | return 0xff - (u8) sum; | |
406 | } | |
407 | ||
408 | static inline void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma, | |
409 | struct mmc_data *data) | |
410 | { | |
411 | unsigned int j, dma_len; | |
412 | dma_addr_t dma_address; | |
413 | u32 dma_ctrl; | |
414 | struct scatterlist *sg; | |
415 | struct mt_gpdma_desc *gpd; | |
416 | struct mt_bdma_desc *bd; | |
417 | ||
418 | sg = data->sg; | |
419 | ||
420 | gpd = dma->gpd; | |
421 | bd = dma->bd; | |
422 | ||
423 | /* modify gpd */ | |
424 | gpd->gpd_info |= GPDMA_DESC_HWO; | |
425 | gpd->gpd_info |= GPDMA_DESC_BDP; | |
426 | /* need to clear first. use these bits to calc checksum */ | |
427 | gpd->gpd_info &= ~GPDMA_DESC_CHECKSUM; | |
428 | gpd->gpd_info |= msdc_dma_calcs((u8 *) gpd, 16) << 8; | |
429 | ||
430 | /* modify bd */ | |
431 | for_each_sg(data->sg, sg, data->sg_count, j) { | |
432 | dma_address = sg_dma_address(sg); | |
433 | dma_len = sg_dma_len(sg); | |
434 | ||
435 | /* init bd */ | |
436 | bd[j].bd_info &= ~BDMA_DESC_BLKPAD; | |
437 | bd[j].bd_info &= ~BDMA_DESC_DWPAD; | |
438 | bd[j].ptr = (u32)dma_address; | |
439 | bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN; | |
440 | bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN); | |
441 | ||
442 | if (j == data->sg_count - 1) /* the last bd */ | |
443 | bd[j].bd_info |= BDMA_DESC_EOL; | |
444 | else | |
445 | bd[j].bd_info &= ~BDMA_DESC_EOL; | |
446 | ||
447 | /* checksume need to clear first */ | |
448 | bd[j].bd_info &= ~BDMA_DESC_CHECKSUM; | |
449 | bd[j].bd_info |= msdc_dma_calcs((u8 *)(&bd[j]), 16) << 8; | |
450 | } | |
451 | ||
452 | sdr_set_field(host->base + MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, 1); | |
453 | dma_ctrl = readl_relaxed(host->base + MSDC_DMA_CTRL); | |
454 | dma_ctrl &= ~(MSDC_DMA_CTRL_BRUSTSZ | MSDC_DMA_CTRL_MODE); | |
455 | dma_ctrl |= (MSDC_BURST_64B << 12 | 1 << 8); | |
456 | writel_relaxed(dma_ctrl, host->base + MSDC_DMA_CTRL); | |
457 | writel((u32)dma->gpd_addr, host->base + MSDC_DMA_SA); | |
458 | } | |
459 | ||
460 | static void msdc_prepare_data(struct msdc_host *host, struct mmc_request *mrq) | |
461 | { | |
462 | struct mmc_data *data = mrq->data; | |
463 | ||
464 | if (!(data->host_cookie & MSDC_PREPARE_FLAG)) { | |
465 | bool read = (data->flags & MMC_DATA_READ) != 0; | |
466 | ||
467 | data->host_cookie |= MSDC_PREPARE_FLAG; | |
468 | data->sg_count = dma_map_sg(host->dev, data->sg, data->sg_len, | |
469 | read ? DMA_FROM_DEVICE : DMA_TO_DEVICE); | |
470 | } | |
471 | } | |
472 | ||
473 | static void msdc_unprepare_data(struct msdc_host *host, struct mmc_request *mrq) | |
474 | { | |
475 | struct mmc_data *data = mrq->data; | |
476 | ||
477 | if (data->host_cookie & MSDC_ASYNC_FLAG) | |
478 | return; | |
479 | ||
480 | if (data->host_cookie & MSDC_PREPARE_FLAG) { | |
481 | bool read = (data->flags & MMC_DATA_READ) != 0; | |
482 | ||
483 | dma_unmap_sg(host->dev, data->sg, data->sg_len, | |
484 | read ? DMA_FROM_DEVICE : DMA_TO_DEVICE); | |
485 | data->host_cookie &= ~MSDC_PREPARE_FLAG; | |
486 | } | |
487 | } | |
488 | ||
489 | /* clock control primitives */ | |
490 | static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks) | |
491 | { | |
492 | u32 timeout, clk_ns; | |
493 | u32 mode = 0; | |
494 | ||
495 | host->timeout_ns = ns; | |
496 | host->timeout_clks = clks; | |
497 | if (host->sclk == 0) { | |
498 | timeout = 0; | |
499 | } else { | |
500 | clk_ns = 1000000000UL / host->sclk; | |
501 | timeout = (ns + clk_ns - 1) / clk_ns + clks; | |
502 | /* in 1048576 sclk cycle unit */ | |
503 | timeout = (timeout + (0x1 << 20) - 1) >> 20; | |
504 | sdr_get_field(host->base + MSDC_CFG, MSDC_CFG_CKMOD, &mode); | |
505 | /*DDR mode will double the clk cycles for data timeout */ | |
506 | timeout = mode >= 2 ? timeout * 2 : timeout; | |
507 | timeout = timeout > 1 ? timeout - 1 : 0; | |
508 | timeout = timeout > 255 ? 255 : timeout; | |
509 | } | |
510 | sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, timeout); | |
511 | } | |
512 | ||
513 | static void msdc_gate_clock(struct msdc_host *host) | |
514 | { | |
515 | clk_disable_unprepare(host->src_clk); | |
516 | clk_disable_unprepare(host->h_clk); | |
517 | } | |
518 | ||
519 | static void msdc_ungate_clock(struct msdc_host *host) | |
520 | { | |
521 | clk_prepare_enable(host->h_clk); | |
522 | clk_prepare_enable(host->src_clk); | |
523 | while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB)) | |
524 | cpu_relax(); | |
525 | } | |
526 | ||
6e622947 | 527 | static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz) |
20848903 CJ |
528 | { |
529 | u32 mode; | |
530 | u32 flags; | |
531 | u32 div; | |
532 | u32 sclk; | |
533 | ||
534 | if (!hz) { | |
535 | dev_dbg(host->dev, "set mclk to 0\n"); | |
536 | host->mclk = 0; | |
537 | sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN); | |
538 | return; | |
539 | } | |
540 | ||
541 | flags = readl(host->base + MSDC_INTEN); | |
542 | sdr_clr_bits(host->base + MSDC_INTEN, flags); | |
6397b7f5 | 543 | sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE); |
6e622947 | 544 | if (timing == MMC_TIMING_UHS_DDR50 || |
6397b7f5 CJ |
545 | timing == MMC_TIMING_MMC_DDR52 || |
546 | timing == MMC_TIMING_MMC_HS400) { | |
547 | if (timing == MMC_TIMING_MMC_HS400) | |
548 | mode = 0x3; | |
549 | else | |
550 | mode = 0x2; /* ddr mode and use divisor */ | |
551 | ||
20848903 CJ |
552 | if (hz >= (host->src_clk_freq >> 2)) { |
553 | div = 0; /* mean div = 1/4 */ | |
554 | sclk = host->src_clk_freq >> 2; /* sclk = clk / 4 */ | |
555 | } else { | |
556 | div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2); | |
557 | sclk = (host->src_clk_freq >> 2) / div; | |
558 | div = (div >> 1); | |
559 | } | |
6397b7f5 CJ |
560 | |
561 | if (timing == MMC_TIMING_MMC_HS400 && | |
562 | hz >= (host->src_clk_freq >> 1)) { | |
563 | sdr_set_bits(host->base + MSDC_CFG, | |
564 | MSDC_CFG_HS400_CK_MODE); | |
565 | sclk = host->src_clk_freq >> 1; | |
566 | div = 0; /* div is ignore when bit18 is set */ | |
567 | } | |
20848903 CJ |
568 | } else if (hz >= host->src_clk_freq) { |
569 | mode = 0x1; /* no divisor */ | |
570 | div = 0; | |
571 | sclk = host->src_clk_freq; | |
572 | } else { | |
573 | mode = 0x0; /* use divisor */ | |
574 | if (hz >= (host->src_clk_freq >> 1)) { | |
575 | div = 0; /* mean div = 1/2 */ | |
576 | sclk = host->src_clk_freq >> 1; /* sclk = clk / 2 */ | |
577 | } else { | |
578 | div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2); | |
579 | sclk = (host->src_clk_freq >> 2) / div; | |
580 | } | |
581 | } | |
582 | sdr_set_field(host->base + MSDC_CFG, MSDC_CFG_CKMOD | MSDC_CFG_CKDIV, | |
40ceda09 | 583 | (mode << 8) | div); |
20848903 CJ |
584 | sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN); |
585 | while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB)) | |
586 | cpu_relax(); | |
587 | host->sclk = sclk; | |
588 | host->mclk = hz; | |
6e622947 | 589 | host->timing = timing; |
20848903 CJ |
590 | /* need because clk changed. */ |
591 | msdc_set_timeout(host, host->timeout_ns, host->timeout_clks); | |
592 | sdr_set_bits(host->base + MSDC_INTEN, flags); | |
593 | ||
86beac37 CJ |
594 | /* |
595 | * mmc_select_hs400() will drop to 50Mhz and High speed mode, | |
596 | * tune result of hs200/200Mhz is not suitable for 50Mhz | |
597 | */ | |
598 | if (host->sclk <= 52000000) { | |
599 | writel(host->def_tune_para.iocon, host->base + MSDC_IOCON); | |
600 | writel(host->def_tune_para.pad_tune, host->base + MSDC_PAD_TUNE); | |
601 | } else { | |
602 | writel(host->saved_tune_para.iocon, host->base + MSDC_IOCON); | |
603 | writel(host->saved_tune_para.pad_tune, host->base + MSDC_PAD_TUNE); | |
604 | } | |
605 | ||
6e622947 | 606 | dev_dbg(host->dev, "sclk: %d, timing: %d\n", host->sclk, timing); |
20848903 CJ |
607 | } |
608 | ||
609 | static inline u32 msdc_cmd_find_resp(struct msdc_host *host, | |
610 | struct mmc_request *mrq, struct mmc_command *cmd) | |
611 | { | |
612 | u32 resp; | |
613 | ||
614 | switch (mmc_resp_type(cmd)) { | |
615 | /* Actually, R1, R5, R6, R7 are the same */ | |
616 | case MMC_RSP_R1: | |
617 | resp = 0x1; | |
618 | break; | |
619 | case MMC_RSP_R1B: | |
620 | resp = 0x7; | |
621 | break; | |
622 | case MMC_RSP_R2: | |
623 | resp = 0x2; | |
624 | break; | |
625 | case MMC_RSP_R3: | |
626 | resp = 0x3; | |
627 | break; | |
628 | case MMC_RSP_NONE: | |
629 | default: | |
630 | resp = 0x0; | |
631 | break; | |
632 | } | |
633 | ||
634 | return resp; | |
635 | } | |
636 | ||
637 | static inline u32 msdc_cmd_prepare_raw_cmd(struct msdc_host *host, | |
638 | struct mmc_request *mrq, struct mmc_command *cmd) | |
639 | { | |
640 | /* rawcmd : | |
641 | * vol_swt << 30 | auto_cmd << 28 | blklen << 16 | go_irq << 15 | | |
642 | * stop << 14 | rw << 13 | dtype << 11 | rsptyp << 7 | brk << 6 | opcode | |
643 | */ | |
644 | u32 opcode = cmd->opcode; | |
645 | u32 resp = msdc_cmd_find_resp(host, mrq, cmd); | |
646 | u32 rawcmd = (opcode & 0x3f) | ((resp & 0x7) << 7); | |
647 | ||
648 | host->cmd_rsp = resp; | |
649 | ||
650 | if ((opcode == SD_IO_RW_DIRECT && cmd->flags == (unsigned int) -1) || | |
651 | opcode == MMC_STOP_TRANSMISSION) | |
652 | rawcmd |= (0x1 << 14); | |
653 | else if (opcode == SD_SWITCH_VOLTAGE) | |
654 | rawcmd |= (0x1 << 30); | |
655 | else if (opcode == SD_APP_SEND_SCR || | |
656 | opcode == SD_APP_SEND_NUM_WR_BLKS || | |
657 | (opcode == SD_SWITCH && mmc_cmd_type(cmd) == MMC_CMD_ADTC) || | |
658 | (opcode == SD_APP_SD_STATUS && mmc_cmd_type(cmd) == MMC_CMD_ADTC) || | |
659 | (opcode == MMC_SEND_EXT_CSD && mmc_cmd_type(cmd) == MMC_CMD_ADTC)) | |
660 | rawcmd |= (0x1 << 11); | |
661 | ||
662 | if (cmd->data) { | |
663 | struct mmc_data *data = cmd->data; | |
664 | ||
665 | if (mmc_op_multi(opcode)) { | |
666 | if (mmc_card_mmc(host->mmc->card) && mrq->sbc && | |
667 | !(mrq->sbc->arg & 0xFFFF0000)) | |
668 | rawcmd |= 0x2 << 28; /* AutoCMD23 */ | |
669 | } | |
670 | ||
671 | rawcmd |= ((data->blksz & 0xFFF) << 16); | |
672 | if (data->flags & MMC_DATA_WRITE) | |
673 | rawcmd |= (0x1 << 13); | |
674 | if (data->blocks > 1) | |
675 | rawcmd |= (0x2 << 11); | |
676 | else | |
677 | rawcmd |= (0x1 << 11); | |
678 | /* Always use dma mode */ | |
679 | sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_PIO); | |
680 | ||
681 | if (host->timeout_ns != data->timeout_ns || | |
682 | host->timeout_clks != data->timeout_clks) | |
683 | msdc_set_timeout(host, data->timeout_ns, | |
684 | data->timeout_clks); | |
685 | ||
686 | writel(data->blocks, host->base + SDC_BLK_NUM); | |
687 | } | |
688 | return rawcmd; | |
689 | } | |
690 | ||
691 | static void msdc_start_data(struct msdc_host *host, struct mmc_request *mrq, | |
692 | struct mmc_command *cmd, struct mmc_data *data) | |
693 | { | |
694 | bool read; | |
695 | ||
696 | WARN_ON(host->data); | |
697 | host->data = data; | |
698 | read = data->flags & MMC_DATA_READ; | |
699 | ||
700 | mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT); | |
701 | msdc_dma_setup(host, &host->dma, data); | |
702 | sdr_set_bits(host->base + MSDC_INTEN, data_ints_mask); | |
703 | sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1); | |
704 | dev_dbg(host->dev, "DMA start\n"); | |
705 | dev_dbg(host->dev, "%s: cmd=%d DMA data: %d blocks; read=%d\n", | |
706 | __func__, cmd->opcode, data->blocks, read); | |
707 | } | |
708 | ||
709 | static int msdc_auto_cmd_done(struct msdc_host *host, int events, | |
710 | struct mmc_command *cmd) | |
711 | { | |
712 | u32 *rsp = cmd->resp; | |
713 | ||
714 | rsp[0] = readl(host->base + SDC_ACMD_RESP); | |
715 | ||
716 | if (events & MSDC_INT_ACMDRDY) { | |
717 | cmd->error = 0; | |
718 | } else { | |
719 | msdc_reset_hw(host); | |
720 | if (events & MSDC_INT_ACMDCRCERR) { | |
721 | cmd->error = -EILSEQ; | |
722 | host->error |= REQ_STOP_EIO; | |
723 | } else if (events & MSDC_INT_ACMDTMO) { | |
724 | cmd->error = -ETIMEDOUT; | |
725 | host->error |= REQ_STOP_TMO; | |
726 | } | |
727 | dev_err(host->dev, | |
728 | "%s: AUTO_CMD%d arg=%08X; rsp %08X; cmd_error=%d\n", | |
729 | __func__, cmd->opcode, cmd->arg, rsp[0], cmd->error); | |
730 | } | |
731 | return cmd->error; | |
732 | } | |
733 | ||
734 | static void msdc_track_cmd_data(struct msdc_host *host, | |
735 | struct mmc_command *cmd, struct mmc_data *data) | |
736 | { | |
737 | if (host->error) | |
738 | dev_dbg(host->dev, "%s: cmd=%d arg=%08X; host->error=0x%08X\n", | |
739 | __func__, cmd->opcode, cmd->arg, host->error); | |
740 | } | |
741 | ||
742 | static void msdc_request_done(struct msdc_host *host, struct mmc_request *mrq) | |
743 | { | |
744 | unsigned long flags; | |
745 | bool ret; | |
746 | ||
747 | ret = cancel_delayed_work(&host->req_timeout); | |
748 | if (!ret) { | |
749 | /* delay work already running */ | |
750 | return; | |
751 | } | |
752 | spin_lock_irqsave(&host->lock, flags); | |
753 | host->mrq = NULL; | |
754 | spin_unlock_irqrestore(&host->lock, flags); | |
755 | ||
756 | msdc_track_cmd_data(host, mrq->cmd, mrq->data); | |
757 | if (mrq->data) | |
758 | msdc_unprepare_data(host, mrq); | |
759 | mmc_request_done(host->mmc, mrq); | |
760 | } | |
761 | ||
762 | /* returns true if command is fully handled; returns false otherwise */ | |
763 | static bool msdc_cmd_done(struct msdc_host *host, int events, | |
764 | struct mmc_request *mrq, struct mmc_command *cmd) | |
765 | { | |
766 | bool done = false; | |
767 | bool sbc_error; | |
768 | unsigned long flags; | |
769 | u32 *rsp = cmd->resp; | |
770 | ||
771 | if (mrq->sbc && cmd == mrq->cmd && | |
772 | (events & (MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR | |
773 | | MSDC_INT_ACMDTMO))) | |
774 | msdc_auto_cmd_done(host, events, mrq->sbc); | |
775 | ||
776 | sbc_error = mrq->sbc && mrq->sbc->error; | |
777 | ||
778 | if (!sbc_error && !(events & (MSDC_INT_CMDRDY | |
779 | | MSDC_INT_RSPCRCERR | |
780 | | MSDC_INT_CMDTMO))) | |
781 | return done; | |
782 | ||
783 | spin_lock_irqsave(&host->lock, flags); | |
784 | done = !host->cmd; | |
785 | host->cmd = NULL; | |
786 | spin_unlock_irqrestore(&host->lock, flags); | |
787 | ||
788 | if (done) | |
789 | return true; | |
790 | ||
726a9aac | 791 | sdr_clr_bits(host->base + MSDC_INTEN, cmd_ints_mask); |
20848903 CJ |
792 | |
793 | if (cmd->flags & MMC_RSP_PRESENT) { | |
794 | if (cmd->flags & MMC_RSP_136) { | |
795 | rsp[0] = readl(host->base + SDC_RESP3); | |
796 | rsp[1] = readl(host->base + SDC_RESP2); | |
797 | rsp[2] = readl(host->base + SDC_RESP1); | |
798 | rsp[3] = readl(host->base + SDC_RESP0); | |
799 | } else { | |
800 | rsp[0] = readl(host->base + SDC_RESP0); | |
801 | } | |
802 | } | |
803 | ||
804 | if (!sbc_error && !(events & MSDC_INT_CMDRDY)) { | |
ddc71387 CJ |
805 | if (cmd->opcode != MMC_SEND_TUNING_BLOCK && |
806 | cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) | |
807 | /* | |
808 | * should not clear fifo/interrupt as the tune data | |
809 | * may have alreay come. | |
810 | */ | |
811 | msdc_reset_hw(host); | |
20848903 CJ |
812 | if (events & MSDC_INT_RSPCRCERR) { |
813 | cmd->error = -EILSEQ; | |
814 | host->error |= REQ_CMD_EIO; | |
815 | } else if (events & MSDC_INT_CMDTMO) { | |
816 | cmd->error = -ETIMEDOUT; | |
817 | host->error |= REQ_CMD_TMO; | |
818 | } | |
819 | } | |
820 | if (cmd->error) | |
821 | dev_dbg(host->dev, | |
822 | "%s: cmd=%d arg=%08X; rsp %08X; cmd_error=%d\n", | |
823 | __func__, cmd->opcode, cmd->arg, rsp[0], | |
824 | cmd->error); | |
825 | ||
826 | msdc_cmd_next(host, mrq, cmd); | |
827 | return true; | |
828 | } | |
829 | ||
830 | /* It is the core layer's responsibility to ensure card status | |
831 | * is correct before issue a request. but host design do below | |
832 | * checks recommended. | |
833 | */ | |
834 | static inline bool msdc_cmd_is_ready(struct msdc_host *host, | |
835 | struct mmc_request *mrq, struct mmc_command *cmd) | |
836 | { | |
837 | /* The max busy time we can endure is 20ms */ | |
838 | unsigned long tmo = jiffies + msecs_to_jiffies(20); | |
839 | ||
840 | while ((readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) && | |
841 | time_before(jiffies, tmo)) | |
842 | cpu_relax(); | |
843 | if (readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) { | |
844 | dev_err(host->dev, "CMD bus busy detected\n"); | |
845 | host->error |= REQ_CMD_BUSY; | |
846 | msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd); | |
847 | return false; | |
848 | } | |
849 | ||
850 | if (mmc_resp_type(cmd) == MMC_RSP_R1B || cmd->data) { | |
851 | tmo = jiffies + msecs_to_jiffies(20); | |
852 | /* R1B or with data, should check SDCBUSY */ | |
853 | while ((readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) && | |
854 | time_before(jiffies, tmo)) | |
855 | cpu_relax(); | |
856 | if (readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) { | |
857 | dev_err(host->dev, "Controller busy detected\n"); | |
858 | host->error |= REQ_CMD_BUSY; | |
859 | msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd); | |
860 | return false; | |
861 | } | |
862 | } | |
863 | return true; | |
864 | } | |
865 | ||
866 | static void msdc_start_command(struct msdc_host *host, | |
867 | struct mmc_request *mrq, struct mmc_command *cmd) | |
868 | { | |
869 | u32 rawcmd; | |
870 | ||
871 | WARN_ON(host->cmd); | |
872 | host->cmd = cmd; | |
873 | ||
874 | if (!msdc_cmd_is_ready(host, mrq, cmd)) | |
875 | return; | |
876 | ||
877 | if ((readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_TXCNT) >> 16 || | |
878 | readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_RXCNT) { | |
879 | dev_err(host->dev, "TX/RX FIFO non-empty before start of IO. Reset\n"); | |
880 | msdc_reset_hw(host); | |
881 | } | |
882 | ||
883 | cmd->error = 0; | |
884 | rawcmd = msdc_cmd_prepare_raw_cmd(host, mrq, cmd); | |
885 | mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT); | |
886 | ||
726a9aac | 887 | sdr_set_bits(host->base + MSDC_INTEN, cmd_ints_mask); |
20848903 CJ |
888 | writel(cmd->arg, host->base + SDC_ARG); |
889 | writel(rawcmd, host->base + SDC_CMD); | |
890 | } | |
891 | ||
892 | static void msdc_cmd_next(struct msdc_host *host, | |
893 | struct mmc_request *mrq, struct mmc_command *cmd) | |
894 | { | |
ddc71387 CJ |
895 | if ((cmd->error && |
896 | !(cmd->error == -EILSEQ && | |
897 | (cmd->opcode == MMC_SEND_TUNING_BLOCK || | |
898 | cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200))) || | |
899 | (mrq->sbc && mrq->sbc->error)) | |
20848903 CJ |
900 | msdc_request_done(host, mrq); |
901 | else if (cmd == mrq->sbc) | |
902 | msdc_start_command(host, mrq, mrq->cmd); | |
903 | else if (!cmd->data) | |
904 | msdc_request_done(host, mrq); | |
905 | else | |
906 | msdc_start_data(host, mrq, cmd, cmd->data); | |
907 | } | |
908 | ||
909 | static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
910 | { | |
911 | struct msdc_host *host = mmc_priv(mmc); | |
912 | ||
913 | host->error = 0; | |
914 | WARN_ON(host->mrq); | |
915 | host->mrq = mrq; | |
916 | ||
917 | if (mrq->data) | |
918 | msdc_prepare_data(host, mrq); | |
919 | ||
920 | /* if SBC is required, we have HW option and SW option. | |
921 | * if HW option is enabled, and SBC does not have "special" flags, | |
922 | * use HW option, otherwise use SW option | |
923 | */ | |
924 | if (mrq->sbc && (!mmc_card_mmc(mmc->card) || | |
925 | (mrq->sbc->arg & 0xFFFF0000))) | |
926 | msdc_start_command(host, mrq, mrq->sbc); | |
927 | else | |
928 | msdc_start_command(host, mrq, mrq->cmd); | |
929 | } | |
930 | ||
d3c6aac3 | 931 | static void msdc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq) |
20848903 CJ |
932 | { |
933 | struct msdc_host *host = mmc_priv(mmc); | |
934 | struct mmc_data *data = mrq->data; | |
935 | ||
936 | if (!data) | |
937 | return; | |
938 | ||
939 | msdc_prepare_data(host, mrq); | |
940 | data->host_cookie |= MSDC_ASYNC_FLAG; | |
941 | } | |
942 | ||
943 | static void msdc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, | |
944 | int err) | |
945 | { | |
946 | struct msdc_host *host = mmc_priv(mmc); | |
947 | struct mmc_data *data; | |
948 | ||
949 | data = mrq->data; | |
950 | if (!data) | |
951 | return; | |
952 | if (data->host_cookie) { | |
953 | data->host_cookie &= ~MSDC_ASYNC_FLAG; | |
954 | msdc_unprepare_data(host, mrq); | |
955 | } | |
956 | } | |
957 | ||
958 | static void msdc_data_xfer_next(struct msdc_host *host, | |
959 | struct mmc_request *mrq, struct mmc_data *data) | |
960 | { | |
961 | if (mmc_op_multi(mrq->cmd->opcode) && mrq->stop && !mrq->stop->error && | |
6397b7f5 | 962 | !mrq->sbc) |
20848903 CJ |
963 | msdc_start_command(host, mrq, mrq->stop); |
964 | else | |
965 | msdc_request_done(host, mrq); | |
966 | } | |
967 | ||
968 | static bool msdc_data_xfer_done(struct msdc_host *host, u32 events, | |
969 | struct mmc_request *mrq, struct mmc_data *data) | |
970 | { | |
971 | struct mmc_command *stop = data->stop; | |
972 | unsigned long flags; | |
973 | bool done; | |
974 | unsigned int check_data = events & | |
975 | (MSDC_INT_XFER_COMPL | MSDC_INT_DATCRCERR | MSDC_INT_DATTMO | |
976 | | MSDC_INT_DMA_BDCSERR | MSDC_INT_DMA_GPDCSERR | |
977 | | MSDC_INT_DMA_PROTECT); | |
978 | ||
979 | spin_lock_irqsave(&host->lock, flags); | |
980 | done = !host->data; | |
981 | if (check_data) | |
982 | host->data = NULL; | |
983 | spin_unlock_irqrestore(&host->lock, flags); | |
984 | ||
985 | if (done) | |
986 | return true; | |
987 | ||
988 | if (check_data || (stop && stop->error)) { | |
989 | dev_dbg(host->dev, "DMA status: 0x%8X\n", | |
990 | readl(host->base + MSDC_DMA_CFG)); | |
991 | sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP, | |
992 | 1); | |
993 | while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS) | |
994 | cpu_relax(); | |
995 | sdr_clr_bits(host->base + MSDC_INTEN, data_ints_mask); | |
996 | dev_dbg(host->dev, "DMA stop\n"); | |
997 | ||
998 | if ((events & MSDC_INT_XFER_COMPL) && (!stop || !stop->error)) { | |
999 | data->bytes_xfered = data->blocks * data->blksz; | |
1000 | } else { | |
2066fd28 | 1001 | dev_dbg(host->dev, "interrupt events: %x\n", events); |
20848903 CJ |
1002 | msdc_reset_hw(host); |
1003 | host->error |= REQ_DAT_ERR; | |
1004 | data->bytes_xfered = 0; | |
1005 | ||
1006 | if (events & MSDC_INT_DATTMO) | |
1007 | data->error = -ETIMEDOUT; | |
6397b7f5 CJ |
1008 | else if (events & MSDC_INT_DATCRCERR) |
1009 | data->error = -EILSEQ; | |
20848903 | 1010 | |
2066fd28 | 1011 | dev_dbg(host->dev, "%s: cmd=%d; blocks=%d", |
20848903 | 1012 | __func__, mrq->cmd->opcode, data->blocks); |
2066fd28 CJ |
1013 | dev_dbg(host->dev, "data_error=%d xfer_size=%d\n", |
1014 | (int)data->error, data->bytes_xfered); | |
20848903 CJ |
1015 | } |
1016 | ||
1017 | msdc_data_xfer_next(host, mrq, data); | |
1018 | done = true; | |
1019 | } | |
1020 | return done; | |
1021 | } | |
1022 | ||
1023 | static void msdc_set_buswidth(struct msdc_host *host, u32 width) | |
1024 | { | |
1025 | u32 val = readl(host->base + SDC_CFG); | |
1026 | ||
1027 | val &= ~SDC_CFG_BUSWIDTH; | |
1028 | ||
1029 | switch (width) { | |
1030 | default: | |
1031 | case MMC_BUS_WIDTH_1: | |
1032 | val |= (MSDC_BUS_1BITS << 16); | |
1033 | break; | |
1034 | case MMC_BUS_WIDTH_4: | |
1035 | val |= (MSDC_BUS_4BITS << 16); | |
1036 | break; | |
1037 | case MMC_BUS_WIDTH_8: | |
1038 | val |= (MSDC_BUS_8BITS << 16); | |
1039 | break; | |
1040 | } | |
1041 | ||
1042 | writel(val, host->base + SDC_CFG); | |
1043 | dev_dbg(host->dev, "Bus Width = %d", width); | |
1044 | } | |
1045 | ||
1046 | static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios) | |
1047 | { | |
1048 | struct msdc_host *host = mmc_priv(mmc); | |
20848903 CJ |
1049 | int ret = 0; |
1050 | ||
1051 | if (!IS_ERR(mmc->supply.vqmmc)) { | |
fac49ce5 NB |
1052 | if (ios->signal_voltage != MMC_SIGNAL_VOLTAGE_330 && |
1053 | ios->signal_voltage != MMC_SIGNAL_VOLTAGE_180) { | |
20848903 CJ |
1054 | dev_err(host->dev, "Unsupported signal voltage!\n"); |
1055 | return -EINVAL; | |
1056 | } | |
1057 | ||
fac49ce5 | 1058 | ret = mmc_regulator_set_vqmmc(mmc, ios); |
20848903 | 1059 | if (ret) { |
fac49ce5 NB |
1060 | dev_dbg(host->dev, "Regulator set error %d (%d)\n", |
1061 | ret, ios->signal_voltage); | |
20848903 CJ |
1062 | } else { |
1063 | /* Apply different pinctrl settings for different signal voltage */ | |
1064 | if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) | |
1065 | pinctrl_select_state(host->pinctrl, host->pins_uhs); | |
1066 | else | |
1067 | pinctrl_select_state(host->pinctrl, host->pins_default); | |
1068 | } | |
1069 | } | |
1070 | return ret; | |
1071 | } | |
1072 | ||
1073 | static int msdc_card_busy(struct mmc_host *mmc) | |
1074 | { | |
1075 | struct msdc_host *host = mmc_priv(mmc); | |
1076 | u32 status = readl(host->base + MSDC_PS); | |
1077 | ||
3bc702ed | 1078 | /* only check if data0 is low */ |
1079 | return !(status & BIT(16)); | |
20848903 CJ |
1080 | } |
1081 | ||
1082 | static void msdc_request_timeout(struct work_struct *work) | |
1083 | { | |
1084 | struct msdc_host *host = container_of(work, struct msdc_host, | |
1085 | req_timeout.work); | |
1086 | ||
1087 | /* simulate HW timeout status */ | |
1088 | dev_err(host->dev, "%s: aborting cmd/data/mrq\n", __func__); | |
1089 | if (host->mrq) { | |
1090 | dev_err(host->dev, "%s: aborting mrq=%p cmd=%d\n", __func__, | |
1091 | host->mrq, host->mrq->cmd->opcode); | |
1092 | if (host->cmd) { | |
1093 | dev_err(host->dev, "%s: aborting cmd=%d\n", | |
1094 | __func__, host->cmd->opcode); | |
1095 | msdc_cmd_done(host, MSDC_INT_CMDTMO, host->mrq, | |
1096 | host->cmd); | |
1097 | } else if (host->data) { | |
1098 | dev_err(host->dev, "%s: abort data: cmd%d; %d blocks\n", | |
1099 | __func__, host->mrq->cmd->opcode, | |
1100 | host->data->blocks); | |
1101 | msdc_data_xfer_done(host, MSDC_INT_DATTMO, host->mrq, | |
1102 | host->data); | |
1103 | } | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | static irqreturn_t msdc_irq(int irq, void *dev_id) | |
1108 | { | |
1109 | struct msdc_host *host = (struct msdc_host *) dev_id; | |
1110 | ||
1111 | while (true) { | |
1112 | unsigned long flags; | |
1113 | struct mmc_request *mrq; | |
1114 | struct mmc_command *cmd; | |
1115 | struct mmc_data *data; | |
1116 | u32 events, event_mask; | |
1117 | ||
1118 | spin_lock_irqsave(&host->lock, flags); | |
1119 | events = readl(host->base + MSDC_INT); | |
1120 | event_mask = readl(host->base + MSDC_INTEN); | |
1121 | /* clear interrupts */ | |
1122 | writel(events & event_mask, host->base + MSDC_INT); | |
1123 | ||
1124 | mrq = host->mrq; | |
1125 | cmd = host->cmd; | |
1126 | data = host->data; | |
1127 | spin_unlock_irqrestore(&host->lock, flags); | |
1128 | ||
1129 | if (!(events & event_mask)) | |
1130 | break; | |
1131 | ||
1132 | if (!mrq) { | |
1133 | dev_err(host->dev, | |
1134 | "%s: MRQ=NULL; events=%08X; event_mask=%08X\n", | |
1135 | __func__, events, event_mask); | |
1136 | WARN_ON(1); | |
1137 | break; | |
1138 | } | |
1139 | ||
1140 | dev_dbg(host->dev, "%s: events=%08X\n", __func__, events); | |
1141 | ||
1142 | if (cmd) | |
1143 | msdc_cmd_done(host, events, mrq, cmd); | |
1144 | else if (data) | |
1145 | msdc_data_xfer_done(host, events, mrq, data); | |
1146 | } | |
1147 | ||
1148 | return IRQ_HANDLED; | |
1149 | } | |
1150 | ||
1151 | static void msdc_init_hw(struct msdc_host *host) | |
1152 | { | |
1153 | u32 val; | |
1154 | ||
1155 | /* Configure to MMC/SD mode, clock free running */ | |
1156 | sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_MODE | MSDC_CFG_CKPDN); | |
1157 | ||
1158 | /* Reset */ | |
1159 | msdc_reset_hw(host); | |
1160 | ||
1161 | /* Disable card detection */ | |
1162 | sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN); | |
1163 | ||
1164 | /* Disable and clear all interrupts */ | |
1165 | writel(0, host->base + MSDC_INTEN); | |
1166 | val = readl(host->base + MSDC_INT); | |
1167 | writel(val, host->base + MSDC_INT); | |
1168 | ||
1169 | writel(0, host->base + MSDC_PAD_TUNE); | |
1170 | writel(0, host->base + MSDC_IOCON); | |
6397b7f5 CJ |
1171 | sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 0); |
1172 | writel(0x403c0046, host->base + MSDC_PATCH_BIT); | |
20848903 CJ |
1173 | sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1); |
1174 | writel(0xffff0089, host->base + MSDC_PATCH_BIT1); | |
6397b7f5 CJ |
1175 | sdr_set_bits(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL); |
1176 | ||
20848903 CJ |
1177 | /* Configure to enable SDIO mode. |
1178 | * it's must otherwise sdio cmd5 failed | |
1179 | */ | |
1180 | sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO); | |
1181 | ||
1182 | /* disable detect SDIO device interrupt function */ | |
1183 | sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE); | |
1184 | ||
1185 | /* Configure to default data timeout */ | |
1186 | sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3); | |
1187 | ||
86beac37 CJ |
1188 | host->def_tune_para.iocon = readl(host->base + MSDC_IOCON); |
1189 | host->def_tune_para.pad_tune = readl(host->base + MSDC_PAD_TUNE); | |
20848903 CJ |
1190 | dev_dbg(host->dev, "init hardware done!"); |
1191 | } | |
1192 | ||
1193 | static void msdc_deinit_hw(struct msdc_host *host) | |
1194 | { | |
1195 | u32 val; | |
1196 | /* Disable and clear all interrupts */ | |
1197 | writel(0, host->base + MSDC_INTEN); | |
1198 | ||
1199 | val = readl(host->base + MSDC_INT); | |
1200 | writel(val, host->base + MSDC_INT); | |
1201 | } | |
1202 | ||
1203 | /* init gpd and bd list in msdc_drv_probe */ | |
1204 | static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma) | |
1205 | { | |
1206 | struct mt_gpdma_desc *gpd = dma->gpd; | |
1207 | struct mt_bdma_desc *bd = dma->bd; | |
1208 | int i; | |
1209 | ||
62b0d27a | 1210 | memset(gpd, 0, sizeof(struct mt_gpdma_desc) * 2); |
20848903 CJ |
1211 | |
1212 | gpd->gpd_info = GPDMA_DESC_BDP; /* hwo, cs, bd pointer */ | |
1213 | gpd->ptr = (u32)dma->bd_addr; /* physical address */ | |
62b0d27a CJ |
1214 | /* gpd->next is must set for desc DMA |
1215 | * That's why must alloc 2 gpd structure. | |
1216 | */ | |
1217 | gpd->next = (u32)dma->gpd_addr + sizeof(struct mt_gpdma_desc); | |
20848903 CJ |
1218 | memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM); |
1219 | for (i = 0; i < (MAX_BD_NUM - 1); i++) | |
1220 | bd[i].next = (u32)dma->bd_addr + sizeof(*bd) * (i + 1); | |
1221 | } | |
1222 | ||
1223 | static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
1224 | { | |
1225 | struct msdc_host *host = mmc_priv(mmc); | |
1226 | int ret; | |
20848903 | 1227 | |
20848903 CJ |
1228 | msdc_set_buswidth(host, ios->bus_width); |
1229 | ||
1230 | /* Suspend/Resume will do power off/on */ | |
1231 | switch (ios->power_mode) { | |
1232 | case MMC_POWER_UP: | |
1233 | if (!IS_ERR(mmc->supply.vmmc)) { | |
6397b7f5 | 1234 | msdc_init_hw(host); |
20848903 CJ |
1235 | ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, |
1236 | ios->vdd); | |
1237 | if (ret) { | |
1238 | dev_err(host->dev, "Failed to set vmmc power!\n"); | |
567979fb | 1239 | return; |
20848903 CJ |
1240 | } |
1241 | } | |
1242 | break; | |
1243 | case MMC_POWER_ON: | |
1244 | if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) { | |
1245 | ret = regulator_enable(mmc->supply.vqmmc); | |
1246 | if (ret) | |
1247 | dev_err(host->dev, "Failed to set vqmmc power!\n"); | |
1248 | else | |
1249 | host->vqmmc_enabled = true; | |
1250 | } | |
1251 | break; | |
1252 | case MMC_POWER_OFF: | |
1253 | if (!IS_ERR(mmc->supply.vmmc)) | |
1254 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); | |
1255 | ||
1256 | if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) { | |
1257 | regulator_disable(mmc->supply.vqmmc); | |
1258 | host->vqmmc_enabled = false; | |
1259 | } | |
1260 | break; | |
1261 | default: | |
1262 | break; | |
1263 | } | |
1264 | ||
6e622947 CJ |
1265 | if (host->mclk != ios->clock || host->timing != ios->timing) |
1266 | msdc_set_mclk(host, ios->timing, ios->clock); | |
20848903 CJ |
1267 | } |
1268 | ||
6397b7f5 CJ |
1269 | static u32 test_delay_bit(u32 delay, u32 bit) |
1270 | { | |
1271 | bit %= PAD_DELAY_MAX; | |
1272 | return delay & (1 << bit); | |
1273 | } | |
1274 | ||
1275 | static int get_delay_len(u32 delay, u32 start_bit) | |
1276 | { | |
1277 | int i; | |
1278 | ||
1279 | for (i = 0; i < (PAD_DELAY_MAX - start_bit); i++) { | |
1280 | if (test_delay_bit(delay, start_bit + i) == 0) | |
1281 | return i; | |
1282 | } | |
1283 | return PAD_DELAY_MAX - start_bit; | |
1284 | } | |
1285 | ||
1286 | static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay) | |
1287 | { | |
1288 | int start = 0, len = 0; | |
1289 | int start_final = 0, len_final = 0; | |
1290 | u8 final_phase = 0xff; | |
62d494ca | 1291 | struct msdc_delay_phase delay_phase = { 0, }; |
6397b7f5 CJ |
1292 | |
1293 | if (delay == 0) { | |
1294 | dev_err(host->dev, "phase error: [map:%x]\n", delay); | |
1295 | delay_phase.final_phase = final_phase; | |
1296 | return delay_phase; | |
1297 | } | |
1298 | ||
1299 | while (start < PAD_DELAY_MAX) { | |
1300 | len = get_delay_len(delay, start); | |
1301 | if (len_final < len) { | |
1302 | start_final = start; | |
1303 | len_final = len; | |
1304 | } | |
1305 | start += len ? len : 1; | |
1306 | if (len >= 8 && start_final < 4) | |
1307 | break; | |
1308 | } | |
1309 | ||
1310 | /* The rule is that to find the smallest delay cell */ | |
1311 | if (start_final == 0) | |
1312 | final_phase = (start_final + len_final / 3) % PAD_DELAY_MAX; | |
1313 | else | |
1314 | final_phase = (start_final + len_final / 2) % PAD_DELAY_MAX; | |
1315 | dev_info(host->dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n", | |
1316 | delay, len_final, final_phase); | |
1317 | ||
1318 | delay_phase.maxlen = len_final; | |
1319 | delay_phase.start = start_final; | |
1320 | delay_phase.final_phase = final_phase; | |
1321 | return delay_phase; | |
1322 | } | |
1323 | ||
1324 | static int msdc_tune_response(struct mmc_host *mmc, u32 opcode) | |
1325 | { | |
1326 | struct msdc_host *host = mmc_priv(mmc); | |
1327 | u32 rise_delay = 0, fall_delay = 0; | |
ae9c657e | 1328 | struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,}; |
6397b7f5 CJ |
1329 | u8 final_delay, final_maxlen; |
1330 | int cmd_err; | |
1331 | int i; | |
1332 | ||
1333 | sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); | |
1334 | for (i = 0 ; i < PAD_DELAY_MAX; i++) { | |
1335 | sdr_set_field(host->base + MSDC_PAD_TUNE, | |
1336 | MSDC_PAD_TUNE_CMDRDLY, i); | |
1337 | mmc_send_tuning(mmc, opcode, &cmd_err); | |
1338 | if (!cmd_err) | |
1339 | rise_delay |= (1 << i); | |
1340 | } | |
ae9c657e CJ |
1341 | final_rise_delay = get_best_delay(host, rise_delay); |
1342 | /* if rising edge has enough margin, then do not scan falling edge */ | |
1343 | if (final_rise_delay.maxlen >= 10 || | |
1344 | (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4)) | |
1345 | goto skip_fall; | |
6397b7f5 CJ |
1346 | |
1347 | sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); | |
1348 | for (i = 0; i < PAD_DELAY_MAX; i++) { | |
1349 | sdr_set_field(host->base + MSDC_PAD_TUNE, | |
1350 | MSDC_PAD_TUNE_CMDRDLY, i); | |
1351 | mmc_send_tuning(mmc, opcode, &cmd_err); | |
1352 | if (!cmd_err) | |
1353 | fall_delay |= (1 << i); | |
1354 | } | |
6397b7f5 CJ |
1355 | final_fall_delay = get_best_delay(host, fall_delay); |
1356 | ||
ae9c657e | 1357 | skip_fall: |
6397b7f5 CJ |
1358 | final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen); |
1359 | if (final_maxlen == final_rise_delay.maxlen) { | |
1360 | sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); | |
1361 | sdr_set_field(host->base + MSDC_PAD_TUNE, MSDC_PAD_TUNE_CMDRDLY, | |
1362 | final_rise_delay.final_phase); | |
1363 | final_delay = final_rise_delay.final_phase; | |
1364 | } else { | |
1365 | sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); | |
1366 | sdr_set_field(host->base + MSDC_PAD_TUNE, MSDC_PAD_TUNE_CMDRDLY, | |
1367 | final_fall_delay.final_phase); | |
1368 | final_delay = final_fall_delay.final_phase; | |
1369 | } | |
1370 | ||
1371 | return final_delay == 0xff ? -EIO : 0; | |
1372 | } | |
1373 | ||
1374 | static int msdc_tune_data(struct mmc_host *mmc, u32 opcode) | |
1375 | { | |
1376 | struct msdc_host *host = mmc_priv(mmc); | |
1377 | u32 rise_delay = 0, fall_delay = 0; | |
ae9c657e | 1378 | struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,}; |
6397b7f5 CJ |
1379 | u8 final_delay, final_maxlen; |
1380 | int i, ret; | |
1381 | ||
1382 | sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); | |
1383 | sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); | |
1384 | for (i = 0 ; i < PAD_DELAY_MAX; i++) { | |
1385 | sdr_set_field(host->base + MSDC_PAD_TUNE, | |
1386 | MSDC_PAD_TUNE_DATRRDLY, i); | |
1387 | ret = mmc_send_tuning(mmc, opcode, NULL); | |
1388 | if (!ret) | |
1389 | rise_delay |= (1 << i); | |
1390 | } | |
ae9c657e CJ |
1391 | final_rise_delay = get_best_delay(host, rise_delay); |
1392 | /* if rising edge has enough margin, then do not scan falling edge */ | |
1393 | if (final_rise_delay.maxlen >= 10 || | |
1394 | (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4)) | |
1395 | goto skip_fall; | |
6397b7f5 CJ |
1396 | |
1397 | sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); | |
1398 | sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); | |
1399 | for (i = 0; i < PAD_DELAY_MAX; i++) { | |
1400 | sdr_set_field(host->base + MSDC_PAD_TUNE, | |
1401 | MSDC_PAD_TUNE_DATRRDLY, i); | |
1402 | ret = mmc_send_tuning(mmc, opcode, NULL); | |
1403 | if (!ret) | |
1404 | fall_delay |= (1 << i); | |
1405 | } | |
6397b7f5 CJ |
1406 | final_fall_delay = get_best_delay(host, fall_delay); |
1407 | ||
ae9c657e | 1408 | skip_fall: |
6397b7f5 | 1409 | final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen); |
6397b7f5 CJ |
1410 | if (final_maxlen == final_rise_delay.maxlen) { |
1411 | sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); | |
1412 | sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); | |
1413 | sdr_set_field(host->base + MSDC_PAD_TUNE, | |
1414 | MSDC_PAD_TUNE_DATRRDLY, | |
1415 | final_rise_delay.final_phase); | |
1416 | final_delay = final_rise_delay.final_phase; | |
1417 | } else { | |
1418 | sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); | |
1419 | sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); | |
1420 | sdr_set_field(host->base + MSDC_PAD_TUNE, | |
1421 | MSDC_PAD_TUNE_DATRRDLY, | |
1422 | final_fall_delay.final_phase); | |
1423 | final_delay = final_fall_delay.final_phase; | |
1424 | } | |
1425 | ||
1426 | return final_delay == 0xff ? -EIO : 0; | |
1427 | } | |
1428 | ||
1429 | static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode) | |
1430 | { | |
1431 | struct msdc_host *host = mmc_priv(mmc); | |
1432 | int ret; | |
1433 | ||
6397b7f5 CJ |
1434 | ret = msdc_tune_response(mmc, opcode); |
1435 | if (ret == -EIO) { | |
1436 | dev_err(host->dev, "Tune response fail!\n"); | |
567979fb | 1437 | return ret; |
6397b7f5 | 1438 | } |
5462ff39 CJ |
1439 | if (host->hs400_mode == false) { |
1440 | ret = msdc_tune_data(mmc, opcode); | |
1441 | if (ret == -EIO) | |
1442 | dev_err(host->dev, "Tune data fail!\n"); | |
1443 | } | |
6397b7f5 | 1444 | |
86beac37 CJ |
1445 | host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON); |
1446 | host->saved_tune_para.pad_tune = readl(host->base + MSDC_PAD_TUNE); | |
6397b7f5 CJ |
1447 | return ret; |
1448 | } | |
1449 | ||
1450 | static int msdc_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios) | |
1451 | { | |
1452 | struct msdc_host *host = mmc_priv(mmc); | |
5462ff39 | 1453 | host->hs400_mode = true; |
6397b7f5 CJ |
1454 | |
1455 | writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE); | |
1456 | return 0; | |
1457 | } | |
1458 | ||
c9b5061e CJ |
1459 | static void msdc_hw_reset(struct mmc_host *mmc) |
1460 | { | |
1461 | struct msdc_host *host = mmc_priv(mmc); | |
1462 | ||
1463 | sdr_set_bits(host->base + EMMC_IOCON, 1); | |
1464 | udelay(10); /* 10us is enough */ | |
1465 | sdr_clr_bits(host->base + EMMC_IOCON, 1); | |
1466 | } | |
1467 | ||
20848903 CJ |
1468 | static struct mmc_host_ops mt_msdc_ops = { |
1469 | .post_req = msdc_post_req, | |
1470 | .pre_req = msdc_pre_req, | |
1471 | .request = msdc_ops_request, | |
1472 | .set_ios = msdc_ops_set_ios, | |
8d53e412 | 1473 | .get_ro = mmc_gpio_get_ro, |
20848903 CJ |
1474 | .start_signal_voltage_switch = msdc_ops_switch_volt, |
1475 | .card_busy = msdc_card_busy, | |
6397b7f5 CJ |
1476 | .execute_tuning = msdc_execute_tuning, |
1477 | .prepare_hs400_tuning = msdc_prepare_hs400_tuning, | |
c9b5061e | 1478 | .hw_reset = msdc_hw_reset, |
20848903 CJ |
1479 | }; |
1480 | ||
1481 | static int msdc_drv_probe(struct platform_device *pdev) | |
1482 | { | |
1483 | struct mmc_host *mmc; | |
1484 | struct msdc_host *host; | |
1485 | struct resource *res; | |
1486 | int ret; | |
1487 | ||
1488 | if (!pdev->dev.of_node) { | |
1489 | dev_err(&pdev->dev, "No DT found\n"); | |
1490 | return -EINVAL; | |
1491 | } | |
1492 | /* Allocate MMC host for this device */ | |
1493 | mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev); | |
1494 | if (!mmc) | |
1495 | return -ENOMEM; | |
1496 | ||
1497 | host = mmc_priv(mmc); | |
1498 | ret = mmc_of_parse(mmc); | |
1499 | if (ret) | |
1500 | goto host_free; | |
1501 | ||
1502 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1503 | host->base = devm_ioremap_resource(&pdev->dev, res); | |
1504 | if (IS_ERR(host->base)) { | |
1505 | ret = PTR_ERR(host->base); | |
1506 | goto host_free; | |
1507 | } | |
1508 | ||
1509 | ret = mmc_regulator_get_supply(mmc); | |
1510 | if (ret == -EPROBE_DEFER) | |
1511 | goto host_free; | |
1512 | ||
1513 | host->src_clk = devm_clk_get(&pdev->dev, "source"); | |
1514 | if (IS_ERR(host->src_clk)) { | |
1515 | ret = PTR_ERR(host->src_clk); | |
1516 | goto host_free; | |
1517 | } | |
1518 | ||
1519 | host->h_clk = devm_clk_get(&pdev->dev, "hclk"); | |
1520 | if (IS_ERR(host->h_clk)) { | |
1521 | ret = PTR_ERR(host->h_clk); | |
1522 | goto host_free; | |
1523 | } | |
1524 | ||
1525 | host->irq = platform_get_irq(pdev, 0); | |
1526 | if (host->irq < 0) { | |
1527 | ret = -EINVAL; | |
1528 | goto host_free; | |
1529 | } | |
1530 | ||
1531 | host->pinctrl = devm_pinctrl_get(&pdev->dev); | |
1532 | if (IS_ERR(host->pinctrl)) { | |
1533 | ret = PTR_ERR(host->pinctrl); | |
1534 | dev_err(&pdev->dev, "Cannot find pinctrl!\n"); | |
1535 | goto host_free; | |
1536 | } | |
1537 | ||
1538 | host->pins_default = pinctrl_lookup_state(host->pinctrl, "default"); | |
1539 | if (IS_ERR(host->pins_default)) { | |
1540 | ret = PTR_ERR(host->pins_default); | |
1541 | dev_err(&pdev->dev, "Cannot find pinctrl default!\n"); | |
1542 | goto host_free; | |
1543 | } | |
1544 | ||
1545 | host->pins_uhs = pinctrl_lookup_state(host->pinctrl, "state_uhs"); | |
1546 | if (IS_ERR(host->pins_uhs)) { | |
1547 | ret = PTR_ERR(host->pins_uhs); | |
1548 | dev_err(&pdev->dev, "Cannot find pinctrl uhs!\n"); | |
1549 | goto host_free; | |
1550 | } | |
1551 | ||
6397b7f5 CJ |
1552 | if (!of_property_read_u32(pdev->dev.of_node, "hs400-ds-delay", |
1553 | &host->hs400_ds_delay)) | |
1554 | dev_dbg(&pdev->dev, "hs400-ds-delay: %x\n", | |
1555 | host->hs400_ds_delay); | |
1556 | ||
20848903 CJ |
1557 | host->dev = &pdev->dev; |
1558 | host->mmc = mmc; | |
1559 | host->src_clk_freq = clk_get_rate(host->src_clk); | |
1560 | /* Set host parameters to mmc */ | |
1561 | mmc->ops = &mt_msdc_ops; | |
40ceda09 | 1562 | mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 255); |
20848903 CJ |
1563 | |
1564 | mmc->caps |= MMC_CAP_ERASE | MMC_CAP_CMD23; | |
1565 | /* MMC core transfer sizes tunable parameters */ | |
1566 | mmc->max_segs = MAX_BD_NUM; | |
1567 | mmc->max_seg_size = BDMA_DESC_BUFLEN; | |
1568 | mmc->max_blk_size = 2048; | |
1569 | mmc->max_req_size = 512 * 1024; | |
1570 | mmc->max_blk_count = mmc->max_req_size / 512; | |
1571 | host->dma_mask = DMA_BIT_MASK(32); | |
1572 | mmc_dev(mmc)->dma_mask = &host->dma_mask; | |
1573 | ||
1574 | host->timeout_clks = 3 * 1048576; | |
1575 | host->dma.gpd = dma_alloc_coherent(&pdev->dev, | |
62b0d27a | 1576 | 2 * sizeof(struct mt_gpdma_desc), |
20848903 CJ |
1577 | &host->dma.gpd_addr, GFP_KERNEL); |
1578 | host->dma.bd = dma_alloc_coherent(&pdev->dev, | |
1579 | MAX_BD_NUM * sizeof(struct mt_bdma_desc), | |
1580 | &host->dma.bd_addr, GFP_KERNEL); | |
1581 | if (!host->dma.gpd || !host->dma.bd) { | |
1582 | ret = -ENOMEM; | |
1583 | goto release_mem; | |
1584 | } | |
1585 | msdc_init_gpd_bd(host, &host->dma); | |
1586 | INIT_DELAYED_WORK(&host->req_timeout, msdc_request_timeout); | |
1587 | spin_lock_init(&host->lock); | |
1588 | ||
1589 | platform_set_drvdata(pdev, mmc); | |
1590 | msdc_ungate_clock(host); | |
1591 | msdc_init_hw(host); | |
1592 | ||
1593 | ret = devm_request_irq(&pdev->dev, host->irq, msdc_irq, | |
1594 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, pdev->name, host); | |
1595 | if (ret) | |
1596 | goto release; | |
1597 | ||
4b8a43e9 CJ |
1598 | pm_runtime_set_active(host->dev); |
1599 | pm_runtime_set_autosuspend_delay(host->dev, MTK_MMC_AUTOSUSPEND_DELAY); | |
1600 | pm_runtime_use_autosuspend(host->dev); | |
1601 | pm_runtime_enable(host->dev); | |
20848903 | 1602 | ret = mmc_add_host(mmc); |
4b8a43e9 | 1603 | |
20848903 | 1604 | if (ret) |
4b8a43e9 | 1605 | goto end; |
20848903 CJ |
1606 | |
1607 | return 0; | |
4b8a43e9 CJ |
1608 | end: |
1609 | pm_runtime_disable(host->dev); | |
20848903 CJ |
1610 | release: |
1611 | platform_set_drvdata(pdev, NULL); | |
1612 | msdc_deinit_hw(host); | |
1613 | msdc_gate_clock(host); | |
1614 | release_mem: | |
1615 | if (host->dma.gpd) | |
1616 | dma_free_coherent(&pdev->dev, | |
62b0d27a | 1617 | 2 * sizeof(struct mt_gpdma_desc), |
20848903 CJ |
1618 | host->dma.gpd, host->dma.gpd_addr); |
1619 | if (host->dma.bd) | |
1620 | dma_free_coherent(&pdev->dev, | |
1621 | MAX_BD_NUM * sizeof(struct mt_bdma_desc), | |
1622 | host->dma.bd, host->dma.bd_addr); | |
1623 | host_free: | |
1624 | mmc_free_host(mmc); | |
1625 | ||
1626 | return ret; | |
1627 | } | |
1628 | ||
1629 | static int msdc_drv_remove(struct platform_device *pdev) | |
1630 | { | |
1631 | struct mmc_host *mmc; | |
1632 | struct msdc_host *host; | |
1633 | ||
1634 | mmc = platform_get_drvdata(pdev); | |
1635 | host = mmc_priv(mmc); | |
1636 | ||
4b8a43e9 CJ |
1637 | pm_runtime_get_sync(host->dev); |
1638 | ||
20848903 CJ |
1639 | platform_set_drvdata(pdev, NULL); |
1640 | mmc_remove_host(host->mmc); | |
1641 | msdc_deinit_hw(host); | |
1642 | msdc_gate_clock(host); | |
1643 | ||
4b8a43e9 CJ |
1644 | pm_runtime_disable(host->dev); |
1645 | pm_runtime_put_noidle(host->dev); | |
20848903 CJ |
1646 | dma_free_coherent(&pdev->dev, |
1647 | sizeof(struct mt_gpdma_desc), | |
1648 | host->dma.gpd, host->dma.gpd_addr); | |
1649 | dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc), | |
1650 | host->dma.bd, host->dma.bd_addr); | |
1651 | ||
1652 | mmc_free_host(host->mmc); | |
1653 | ||
1654 | return 0; | |
1655 | } | |
1656 | ||
4b8a43e9 CJ |
1657 | #ifdef CONFIG_PM |
1658 | static void msdc_save_reg(struct msdc_host *host) | |
1659 | { | |
1660 | host->save_para.msdc_cfg = readl(host->base + MSDC_CFG); | |
1661 | host->save_para.iocon = readl(host->base + MSDC_IOCON); | |
1662 | host->save_para.sdc_cfg = readl(host->base + SDC_CFG); | |
1663 | host->save_para.pad_tune = readl(host->base + MSDC_PAD_TUNE); | |
1664 | host->save_para.patch_bit0 = readl(host->base + MSDC_PATCH_BIT); | |
1665 | host->save_para.patch_bit1 = readl(host->base + MSDC_PATCH_BIT1); | |
6397b7f5 CJ |
1666 | host->save_para.pad_ds_tune = readl(host->base + PAD_DS_TUNE); |
1667 | host->save_para.emmc50_cfg0 = readl(host->base + EMMC50_CFG0); | |
4b8a43e9 CJ |
1668 | } |
1669 | ||
1670 | static void msdc_restore_reg(struct msdc_host *host) | |
1671 | { | |
1672 | writel(host->save_para.msdc_cfg, host->base + MSDC_CFG); | |
1673 | writel(host->save_para.iocon, host->base + MSDC_IOCON); | |
1674 | writel(host->save_para.sdc_cfg, host->base + SDC_CFG); | |
1675 | writel(host->save_para.pad_tune, host->base + MSDC_PAD_TUNE); | |
1676 | writel(host->save_para.patch_bit0, host->base + MSDC_PATCH_BIT); | |
1677 | writel(host->save_para.patch_bit1, host->base + MSDC_PATCH_BIT1); | |
6397b7f5 CJ |
1678 | writel(host->save_para.pad_ds_tune, host->base + PAD_DS_TUNE); |
1679 | writel(host->save_para.emmc50_cfg0, host->base + EMMC50_CFG0); | |
4b8a43e9 CJ |
1680 | } |
1681 | ||
1682 | static int msdc_runtime_suspend(struct device *dev) | |
1683 | { | |
1684 | struct mmc_host *mmc = dev_get_drvdata(dev); | |
1685 | struct msdc_host *host = mmc_priv(mmc); | |
1686 | ||
1687 | msdc_save_reg(host); | |
1688 | msdc_gate_clock(host); | |
1689 | return 0; | |
1690 | } | |
1691 | ||
1692 | static int msdc_runtime_resume(struct device *dev) | |
1693 | { | |
1694 | struct mmc_host *mmc = dev_get_drvdata(dev); | |
1695 | struct msdc_host *host = mmc_priv(mmc); | |
1696 | ||
1697 | msdc_ungate_clock(host); | |
1698 | msdc_restore_reg(host); | |
1699 | return 0; | |
1700 | } | |
1701 | #endif | |
1702 | ||
1703 | static const struct dev_pm_ops msdc_dev_pm_ops = { | |
1704 | SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, | |
1705 | pm_runtime_force_resume) | |
1706 | SET_RUNTIME_PM_OPS(msdc_runtime_suspend, msdc_runtime_resume, NULL) | |
1707 | }; | |
1708 | ||
20848903 CJ |
1709 | static const struct of_device_id msdc_of_ids[] = { |
1710 | { .compatible = "mediatek,mt8135-mmc", }, | |
1711 | {} | |
1712 | }; | |
9cb02eef | 1713 | MODULE_DEVICE_TABLE(of, msdc_of_ids); |
20848903 CJ |
1714 | |
1715 | static struct platform_driver mt_msdc_driver = { | |
1716 | .probe = msdc_drv_probe, | |
1717 | .remove = msdc_drv_remove, | |
1718 | .driver = { | |
1719 | .name = "mtk-msdc", | |
1720 | .of_match_table = msdc_of_ids, | |
4b8a43e9 | 1721 | .pm = &msdc_dev_pm_ops, |
20848903 CJ |
1722 | }, |
1723 | }; | |
1724 | ||
1725 | module_platform_driver(mt_msdc_driver); | |
1726 | MODULE_LICENSE("GPL v2"); | |
1727 | MODULE_DESCRIPTION("MediaTek SD/MMC Card Driver"); |