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Commit | Line | Data |
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a87d5638 MD |
1 | /* |
2 | * SuperH Mobile SDHI | |
3 | * | |
a72e8b17 WS |
4 | * Copyright (C) 2016 Sang Engineering, Wolfram Sang |
5 | * Copyright (C) 2015-16 Renesas Electronics Corporation | |
a87d5638 MD |
6 | * Copyright (C) 2009 Magnus Damm |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * Based on "Compaq ASIC3 support": | |
13 | * | |
14 | * Copyright 2001 Compaq Computer Corporation. | |
15 | * Copyright 2004-2005 Phil Blundell | |
16 | * Copyright 2007-2008 OpenedHand Ltd. | |
17 | * | |
18 | * Authors: Phil Blundell <pb@handhelds.org>, | |
19 | * Samuel Ortiz <sameo@openedhand.com> | |
20 | * | |
21 | */ | |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/clk.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
c7bb4487 | 26 | #include <linux/mod_devicetable.h> |
88b47679 | 27 | #include <linux/module.h> |
5a00a971 | 28 | #include <linux/of_device.h> |
a87d5638 | 29 | #include <linux/platform_device.h> |
3c49e810 | 30 | #include <linux/mmc/host.h> |
42051e8a | 31 | #include <linux/mmc/sh_mobile_sdhi.h> |
a87d5638 | 32 | #include <linux/mfd/tmio.h> |
056676da | 33 | #include <linux/sh_dma.h> |
973ed3af | 34 | #include <linux/delay.h> |
a87d5638 | 35 | |
42051e8a GL |
36 | #include "tmio_mmc.h" |
37 | ||
e3c418f1 KM |
38 | #define EXT_ACC 0xe4 |
39 | ||
16935250 KM |
40 | #define host_to_priv(host) container_of((host)->pdata, struct sh_mobile_sdhi, mmc_data) |
41 | ||
5a00a971 GL |
42 | struct sh_mobile_sdhi_of_data { |
43 | unsigned long tmio_flags; | |
b3a5d4ce | 44 | unsigned long capabilities; |
423f6c2e | 45 | unsigned long capabilities2; |
f45394d5 | 46 | enum dma_slave_buswidth dma_buswidth; |
384b2cbd | 47 | dma_addr_t dma_rx_offset; |
a72e8b17 | 48 | unsigned bus_shift; |
5a00a971 GL |
49 | }; |
50 | ||
51 | static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = { | |
52 | { | |
53 | .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT, | |
54 | }, | |
55 | }; | |
56 | ||
b3a5d4ce | 57 | static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = { |
da29fe2b SU |
58 | .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE | |
59 | TMIO_MMC_CLK_ACTUAL, | |
b3a5d4ce KM |
60 | .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ, |
61 | }; | |
62 | ||
423f6c2e | 63 | static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = { |
da29fe2b | 64 | .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE | |
16a65524 | 65 | TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG, |
423f6c2e | 66 | .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ, |
f45394d5 | 67 | .dma_buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES, |
384b2cbd | 68 | .dma_rx_offset = 0x2000, |
423f6c2e KM |
69 | }; |
70 | ||
a72e8b17 WS |
71 | static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = { |
72 | .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE | | |
73 | TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG, | |
74 | .capabilities = MMC_CAP_SD_HIGHSPEED, | |
75 | .bus_shift = 2, | |
76 | }; | |
77 | ||
2772ef30 KM |
78 | static const struct of_device_id sh_mobile_sdhi_of_match[] = { |
79 | { .compatible = "renesas,sdhi-shmobile" }, | |
80 | { .compatible = "renesas,sdhi-sh7372" }, | |
81 | { .compatible = "renesas,sdhi-sh73a0", .data = &sh_mobile_sdhi_of_cfg[0], }, | |
82 | { .compatible = "renesas,sdhi-r8a73a4", .data = &sh_mobile_sdhi_of_cfg[0], }, | |
83 | { .compatible = "renesas,sdhi-r8a7740", .data = &sh_mobile_sdhi_of_cfg[0], }, | |
b3a5d4ce | 84 | { .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, }, |
81bbbc72 | 85 | { .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, }, |
423f6c2e | 86 | { .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, }, |
81918d25 | 87 | { .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, }, |
a6386403 GU |
88 | { .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, }, |
89 | { .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, }, | |
90 | { .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, }, | |
a72e8b17 | 91 | { .compatible = "renesas,sdhi-r8a7795", .data = &of_rcar_gen3_compatible, }, |
2772ef30 KM |
92 | {}, |
93 | }; | |
94 | MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match); | |
95 | ||
a87d5638 MD |
96 | struct sh_mobile_sdhi { |
97 | struct clk *clk; | |
98 | struct tmio_mmc_data mmc_data; | |
056676da | 99 | struct tmio_mmc_dma dma_priv; |
a87d5638 MD |
100 | }; |
101 | ||
f45394d5 KM |
102 | static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width) |
103 | { | |
104 | u32 val; | |
105 | ||
106 | /* | |
107 | * see also | |
108 | * sh_mobile_sdhi_of_data :: dma_buswidth | |
109 | */ | |
110 | switch (sd_ctrl_read16(host, CTL_VERSION)) { | |
111 | case 0x490C: | |
112 | val = (width == 32) ? 0x0001 : 0x0000; | |
113 | break; | |
114 | case 0xCB0D: | |
115 | val = (width == 32) ? 0x0000 : 0x0001; | |
116 | break; | |
a72e8b17 WS |
117 | case 0xCC10: /* Gen3, SD only */ |
118 | case 0xCD10: /* Gen3, SD + MMC */ | |
119 | if (width == 64) | |
120 | val = 0x0000; | |
121 | else if (width == 32) | |
122 | val = 0x0101; | |
123 | else | |
124 | val = 0x0001; | |
125 | break; | |
f45394d5 KM |
126 | default: |
127 | /* nothing to do */ | |
128 | return; | |
129 | } | |
130 | ||
131 | sd_ctrl_write16(host, EXT_ACC, val); | |
132 | } | |
133 | ||
0ea28210 | 134 | static int sh_mobile_sdhi_clk_enable(struct tmio_mmc_host *host) |
56c49287 | 135 | { |
0ea28210 | 136 | struct mmc_host *mmc = host->mmc; |
16935250 | 137 | struct sh_mobile_sdhi *priv = host_to_priv(host); |
00fb3d2a | 138 | int ret = clk_prepare_enable(priv->clk); |
56c49287 GL |
139 | if (ret < 0) |
140 | return ret; | |
141 | ||
0ea28210 | 142 | mmc->f_max = clk_get_rate(priv->clk); |
f45394d5 KM |
143 | |
144 | /* enable 16bit data access on SDBUF as default */ | |
145 | sh_mobile_sdhi_sdbuf_width(host, 16); | |
146 | ||
56c49287 GL |
147 | return 0; |
148 | } | |
149 | ||
0ea28210 | 150 | static void sh_mobile_sdhi_clk_disable(struct tmio_mmc_host *host) |
56c49287 | 151 | { |
16935250 | 152 | struct sh_mobile_sdhi *priv = host_to_priv(host); |
0ea28210 | 153 | |
00fb3d2a | 154 | clk_disable_unprepare(priv->clk); |
56c49287 GL |
155 | } |
156 | ||
973ed3af SH |
157 | static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host) |
158 | { | |
159 | int timeout = 1000; | |
160 | ||
161 | while (--timeout && !(sd_ctrl_read16(host, CTL_STATUS2) & (1 << 13))) | |
162 | udelay(1); | |
163 | ||
164 | if (!timeout) { | |
94b110af | 165 | dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n"); |
973ed3af SH |
166 | return -EBUSY; |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr) | |
173 | { | |
174 | switch (addr) | |
175 | { | |
176 | case CTL_SD_CMD: | |
177 | case CTL_STOP_INTERNAL_ACTION: | |
178 | case CTL_XFER_BLK_COUNT: | |
179 | case CTL_SD_CARD_CLK_CTL: | |
180 | case CTL_SD_XFER_LEN: | |
181 | case CTL_SD_MEM_CARD_OPT: | |
182 | case CTL_TRANSACTION_CTL: | |
183 | case CTL_DMA_ENABLE: | |
ff741cfd | 184 | case EXT_ACC: |
973ed3af SH |
185 | return sh_mobile_sdhi_wait_idle(host); |
186 | } | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
8b4efe2f KM |
191 | static int sh_mobile_sdhi_multi_io_quirk(struct mmc_card *card, |
192 | unsigned int direction, int blk_size) | |
193 | { | |
194 | /* | |
195 | * In Renesas controllers, when performing a | |
196 | * multiple block read of one or two blocks, | |
197 | * depending on the timing with which the | |
198 | * response register is read, the response | |
199 | * value may not be read properly. | |
200 | * Use single block read for this HW bug | |
201 | */ | |
202 | if ((direction == MMC_DATA_READ) && | |
203 | blk_size == 2) | |
204 | return 1; | |
205 | ||
206 | return blk_size; | |
207 | } | |
208 | ||
0c47f6ae KM |
209 | static void sh_mobile_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable) |
210 | { | |
211 | sd_ctrl_write16(host, CTL_DMA_ENABLE, enable ? 2 : 0); | |
f45394d5 KM |
212 | |
213 | /* enable 32bit access if DMA mode if possibile */ | |
214 | sh_mobile_sdhi_sdbuf_width(host, enable ? 32 : 16); | |
0c47f6ae KM |
215 | } |
216 | ||
c3be1efd | 217 | static int sh_mobile_sdhi_probe(struct platform_device *pdev) |
a87d5638 | 218 | { |
5a00a971 GL |
219 | const struct of_device_id *of_id = |
220 | of_match_device(sh_mobile_sdhi_of_match, &pdev->dev); | |
a87d5638 | 221 | struct sh_mobile_sdhi *priv; |
056676da | 222 | struct tmio_mmc_data *mmc_data; |
f33c9d65 | 223 | struct tmio_mmc_data *mmd = pdev->dev.platform_data; |
42051e8a | 224 | struct tmio_mmc_host *host; |
3b159a6e | 225 | struct resource *res; |
d5098cb6 SH |
226 | int irq, ret, i = 0; |
227 | bool multiplexed_isr = true; | |
87ae7bbe | 228 | struct tmio_mmc_dma *dma_priv; |
a87d5638 | 229 | |
3b159a6e KM |
230 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
231 | if (!res) | |
232 | return -EINVAL; | |
233 | ||
ac51b961 | 234 | priv = devm_kzalloc(&pdev->dev, sizeof(struct sh_mobile_sdhi), GFP_KERNEL); |
2bf8ab6b | 235 | if (!priv) |
a87d5638 | 236 | return -ENOMEM; |
a87d5638 | 237 | |
056676da | 238 | mmc_data = &priv->mmc_data; |
87ae7bbe | 239 | dma_priv = &priv->dma_priv; |
056676da | 240 | |
ac51b961 | 241 | priv->clk = devm_clk_get(&pdev->dev, NULL); |
a87d5638 | 242 | if (IS_ERR(priv->clk)) { |
a87d5638 | 243 | ret = PTR_ERR(priv->clk); |
56ae1adc | 244 | dev_err(&pdev->dev, "cannot get clock: %d\n", ret); |
010f4aa7 | 245 | goto eprobe; |
a87d5638 MD |
246 | } |
247 | ||
94b110af KM |
248 | host = tmio_mmc_host_alloc(pdev); |
249 | if (!host) { | |
250 | ret = -ENOMEM; | |
251 | goto eprobe; | |
252 | } | |
253 | ||
a72e8b17 WS |
254 | if (of_id && of_id->data) { |
255 | const struct sh_mobile_sdhi_of_data *of_data = of_id->data; | |
256 | ||
257 | mmc_data->flags |= of_data->tmio_flags; | |
258 | mmc_data->capabilities |= of_data->capabilities; | |
259 | mmc_data->capabilities2 |= of_data->capabilities2; | |
260 | mmc_data->dma_rx_offset = of_data->dma_rx_offset; | |
261 | dma_priv->dma_buswidth = of_data->dma_buswidth; | |
262 | host->bus_shift = of_data->bus_shift; | |
263 | } | |
264 | ||
7ecc09ba | 265 | host->dma = dma_priv; |
dfe9a229 | 266 | host->write16_hook = sh_mobile_sdhi_write16_hook; |
4fe2ec57 | 267 | host->clk_enable = sh_mobile_sdhi_clk_enable; |
00452c11 | 268 | host->clk_disable = sh_mobile_sdhi_clk_disable; |
85c02ddd | 269 | host->multi_io_quirk = sh_mobile_sdhi_multi_io_quirk; |
a72e8b17 WS |
270 | |
271 | /* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */ | |
272 | if (!host->bus_shift && resource_size(res) > 0x100) /* old way to determine the shift */ | |
95a7dc36 | 273 | host->bus_shift = 1; |
7ecc09ba | 274 | |
84f11d5b | 275 | if (mmd) |
f33c9d65 | 276 | *mmc_data = *mmd; |
84f11d5b | 277 | |
87ae7bbe | 278 | dma_priv->filter = shdma_chan_filter; |
0c47f6ae | 279 | dma_priv->enable = sh_mobile_sdhi_enable_dma; |
87ae7bbe | 280 | |
e471df0b | 281 | mmc_data->alignment_shift = 1; /* 2-byte alignment */ |
f33c9d65 | 282 | mmc_data->capabilities |= MMC_CAP_MMC_HIGHSPEED; |
e471df0b | 283 | |
f1334fb3 YG |
284 | /* |
285 | * All SDHI blocks support 2-byte and larger block sizes in 4-bit | |
286 | * bus width mode. | |
287 | */ | |
288 | mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES; | |
289 | ||
23b66071 AH |
290 | /* |
291 | * All SDHI blocks support SDIO IRQ signalling. | |
292 | */ | |
293 | mmc_data->flags |= TMIO_MMC_SDIO_IRQ; | |
294 | ||
b8d11962 SU |
295 | /* |
296 | * All SDHI have CMD12 controll bit | |
297 | */ | |
298 | mmc_data->flags |= TMIO_MMC_HAVE_CMD12_CTRL; | |
299 | ||
6b98757e SU |
300 | /* |
301 | * All SDHI need SDIO_INFO1 reserved bit | |
302 | */ | |
303 | mmc_data->flags |= TMIO_MMC_SDIO_STATUS_QUIRK; | |
304 | ||
94b110af | 305 | ret = tmio_mmc_host_probe(host, mmc_data); |
42051e8a | 306 | if (ret < 0) |
94b110af | 307 | goto efree; |
a87d5638 | 308 | |
d5098cb6 SH |
309 | /* |
310 | * Allow one or more specific (named) ISRs or | |
311 | * one or more multiplexed (un-named) ISRs. | |
312 | */ | |
313 | ||
314 | irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT); | |
315 | if (irq >= 0) { | |
316 | multiplexed_isr = false; | |
ac51b961 | 317 | ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_card_detect_irq, 0, |
d5098cb6 SH |
318 | dev_name(&pdev->dev), host); |
319 | if (ret) | |
ac51b961 | 320 | goto eirq; |
d5098cb6 SH |
321 | } |
322 | ||
323 | irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO); | |
324 | if (irq >= 0) { | |
325 | multiplexed_isr = false; | |
ac51b961 | 326 | ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdio_irq, 0, |
d5098cb6 SH |
327 | dev_name(&pdev->dev), host); |
328 | if (ret) | |
ac51b961 | 329 | goto eirq; |
d5098cb6 SH |
330 | } |
331 | ||
332 | irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDCARD); | |
333 | if (irq >= 0) { | |
334 | multiplexed_isr = false; | |
ac51b961 | 335 | ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdcard_irq, 0, |
d6a1f863 | 336 | dev_name(&pdev->dev), host); |
d5098cb6 | 337 | if (ret) |
ac51b961 | 338 | goto eirq; |
d5098cb6 SH |
339 | } else if (!multiplexed_isr) { |
340 | dev_err(&pdev->dev, | |
341 | "Principal SD-card IRQ is missing among named interrupts\n"); | |
342 | ret = irq; | |
ac51b961 | 343 | goto eirq; |
d5098cb6 SH |
344 | } |
345 | ||
346 | if (multiplexed_isr) { | |
347 | while (1) { | |
348 | irq = platform_get_irq(pdev, i); | |
349 | if (irq < 0) | |
350 | break; | |
351 | i++; | |
ac51b961 | 352 | ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0, |
d5098cb6 SH |
353 | dev_name(&pdev->dev), host); |
354 | if (ret) | |
ac51b961 | 355 | goto eirq; |
d6a1f863 | 356 | } |
d5098cb6 SH |
357 | |
358 | /* There must be at least one IRQ source */ | |
7913ae7d WY |
359 | if (!i) { |
360 | ret = irq; | |
ac51b961 | 361 | goto eirq; |
7913ae7d | 362 | } |
8e7bfdb3 | 363 | } |
d5098cb6 | 364 | |
1f7d6819 MD |
365 | dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n", |
366 | mmc_hostname(host->mmc), (unsigned long) | |
58126c87 | 367 | (platform_get_resource(pdev, IORESOURCE_MEM, 0)->start), |
369213bd | 368 | host->mmc->f_max / 1000000); |
a87d5638 | 369 | |
42051e8a | 370 | return ret; |
a87d5638 | 371 | |
ac51b961 | 372 | eirq: |
8e7bfdb3 | 373 | tmio_mmc_host_remove(host); |
94b110af KM |
374 | efree: |
375 | tmio_mmc_host_free(host); | |
42051e8a | 376 | eprobe: |
a87d5638 MD |
377 | return ret; |
378 | } | |
379 | ||
380 | static int sh_mobile_sdhi_remove(struct platform_device *pdev) | |
381 | { | |
42051e8a GL |
382 | struct mmc_host *mmc = platform_get_drvdata(pdev); |
383 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
d6a1f863 | 384 | |
742a0c7c GL |
385 | tmio_mmc_host_remove(host); |
386 | ||
a87d5638 MD |
387 | return 0; |
388 | } | |
389 | ||
e6ee7182 | 390 | static const struct dev_pm_ops tmio_mmc_dev_pm_ops = { |
753a688c UH |
391 | SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, |
392 | pm_runtime_force_resume) | |
6ed23b80 | 393 | SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend, |
4e262d7f UH |
394 | tmio_mmc_host_runtime_resume, |
395 | NULL) | |
e6ee7182 GL |
396 | }; |
397 | ||
a87d5638 MD |
398 | static struct platform_driver sh_mobile_sdhi_driver = { |
399 | .driver = { | |
400 | .name = "sh_mobile_sdhi", | |
e6ee7182 | 401 | .pm = &tmio_mmc_dev_pm_ops, |
c7bb4487 | 402 | .of_match_table = sh_mobile_sdhi_of_match, |
a87d5638 MD |
403 | }, |
404 | .probe = sh_mobile_sdhi_probe, | |
0433c143 | 405 | .remove = sh_mobile_sdhi_remove, |
a87d5638 MD |
406 | }; |
407 | ||
d1f81a64 | 408 | module_platform_driver(sh_mobile_sdhi_driver); |
a87d5638 MD |
409 | |
410 | MODULE_DESCRIPTION("SuperH Mobile SDHI driver"); | |
411 | MODULE_AUTHOR("Magnus Damm"); | |
412 | MODULE_LICENSE("GPL v2"); | |
42051e8a | 413 | MODULE_ALIAS("platform:sh_mobile_sdhi"); |