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1/*
2 * SuperH Mobile SDHI
3 *
4 * Copyright (C) 2009 Magnus Damm
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Based on "Compaq ASIC3 support":
11 *
12 * Copyright 2001 Compaq Computer Corporation.
13 * Copyright 2004-2005 Phil Blundell
14 * Copyright 2007-2008 OpenedHand Ltd.
15 *
16 * Authors: Phil Blundell <pb@handhelds.org>,
17 * Samuel Ortiz <sameo@openedhand.com>
18 *
19 */
20
21#include <linux/kernel.h>
22#include <linux/clk.h>
23#include <linux/slab.h>
24#include <linux/platform_device.h>
25#include <linux/mmc/host.h>
26#include <linux/mmc/sh_mobile_sdhi.h>
27#include <linux/mfd/tmio.h>
28#include <linux/sh_dma.h>
29#include <linux/delay.h>
30
31#include "tmio_mmc.h"
32
33struct sh_mobile_sdhi {
34 struct clk *clk;
35 struct tmio_mmc_data mmc_data;
36 struct sh_dmae_slave param_tx;
37 struct sh_dmae_slave param_rx;
38 struct tmio_mmc_dma dma_priv;
39};
40
41static void sh_mobile_sdhi_set_pwr(struct platform_device *pdev, int state)
42{
43 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
44
45 if (p && p->set_pwr)
46 p->set_pwr(pdev, state);
47}
48
49static int sh_mobile_sdhi_get_cd(struct platform_device *pdev)
50{
51 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
52
53 if (p && p->get_cd)
54 return p->get_cd(pdev);
55 else
56 return -ENOSYS;
57}
58
59static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
60{
61 int timeout = 1000;
62
63 while (--timeout && !(sd_ctrl_read16(host, CTL_STATUS2) & (1 << 13)))
64 udelay(1);
65
66 if (!timeout) {
67 dev_warn(host->pdata->dev, "timeout waiting for SD bus idle\n");
68 return -EBUSY;
69 }
70
71 return 0;
72}
73
74static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
75{
76 switch (addr)
77 {
78 case CTL_SD_CMD:
79 case CTL_STOP_INTERNAL_ACTION:
80 case CTL_XFER_BLK_COUNT:
81 case CTL_SD_CARD_CLK_CTL:
82 case CTL_SD_XFER_LEN:
83 case CTL_SD_MEM_CARD_OPT:
84 case CTL_TRANSACTION_CTL:
85 case CTL_DMA_ENABLE:
86 return sh_mobile_sdhi_wait_idle(host);
87 }
88
89 return 0;
90}
91
92static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
93{
94 struct sh_mobile_sdhi *priv;
95 struct tmio_mmc_data *mmc_data;
96 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
97 struct tmio_mmc_host *host;
98 char clk_name[8];
99 int i, irq, ret;
100
101 priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
102 if (priv == NULL) {
103 dev_err(&pdev->dev, "kzalloc failed\n");
104 return -ENOMEM;
105 }
106
107 mmc_data = &priv->mmc_data;
108 p->pdata = mmc_data;
109
110 snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
111 priv->clk = clk_get(&pdev->dev, clk_name);
112 if (IS_ERR(priv->clk)) {
113 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
114 ret = PTR_ERR(priv->clk);
115 goto eclkget;
116 }
117
118 clk_enable(priv->clk);
119
120 mmc_data->hclk = clk_get_rate(priv->clk);
121 mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
122 mmc_data->get_cd = sh_mobile_sdhi_get_cd;
123 mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
124 if (p) {
125 mmc_data->flags = p->tmio_flags;
126 if (mmc_data->flags & TMIO_MMC_HAS_IDLE_WAIT)
127 mmc_data->write16_hook = sh_mobile_sdhi_write16_hook;
128 mmc_data->ocr_mask = p->tmio_ocr_mask;
129 mmc_data->capabilities |= p->tmio_caps;
130
131 if (p->dma_slave_tx > 0 && p->dma_slave_rx > 0) {
132 priv->param_tx.slave_id = p->dma_slave_tx;
133 priv->param_rx.slave_id = p->dma_slave_rx;
134 priv->dma_priv.chan_priv_tx = &priv->param_tx;
135 priv->dma_priv.chan_priv_rx = &priv->param_rx;
136 priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */
137 mmc_data->dma = &priv->dma_priv;
138 }
139 }
140
141 /*
142 * All SDHI blocks support 2-byte and larger block sizes in 4-bit
143 * bus width mode.
144 */
145 mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
146
147 /*
148 * All SDHI blocks support SDIO IRQ signalling.
149 */
150 mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
151
152 ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
153 if (ret < 0)
154 goto eprobe;
155
156 for (i = 0; i < 3; i++) {
157 irq = platform_get_irq(pdev, i);
158 if (irq < 0) {
159 if (i) {
160 continue;
161 } else {
162 ret = irq;
163 goto eirq;
164 }
165 }
166 ret = request_irq(irq, tmio_mmc_irq, 0,
167 dev_name(&pdev->dev), host);
168 if (ret) {
169 while (i--) {
170 irq = platform_get_irq(pdev, i);
171 if (irq >= 0)
172 free_irq(irq, host);
173 }
174 goto eirq;
175 }
176 }
177 dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
178 mmc_hostname(host->mmc), (unsigned long)
179 (platform_get_resource(pdev,IORESOURCE_MEM, 0)->start),
180 mmc_data->hclk / 1000000);
181
182 return ret;
183
184eirq:
185 tmio_mmc_host_remove(host);
186eprobe:
187 clk_disable(priv->clk);
188 clk_put(priv->clk);
189eclkget:
190 kfree(priv);
191 return ret;
192}
193
194static int sh_mobile_sdhi_remove(struct platform_device *pdev)
195{
196 struct mmc_host *mmc = platform_get_drvdata(pdev);
197 struct tmio_mmc_host *host = mmc_priv(mmc);
198 struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
199 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
200 int i, irq;
201
202 p->pdata = NULL;
203
204 tmio_mmc_host_remove(host);
205
206 for (i = 0; i < 3; i++) {
207 irq = platform_get_irq(pdev, i);
208 if (irq >= 0)
209 free_irq(irq, host);
210 }
211
212 clk_disable(priv->clk);
213 clk_put(priv->clk);
214 kfree(priv);
215
216 return 0;
217}
218
219static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
220 .suspend = tmio_mmc_host_suspend,
221 .resume = tmio_mmc_host_resume,
222 .runtime_suspend = tmio_mmc_host_runtime_suspend,
223 .runtime_resume = tmio_mmc_host_runtime_resume,
224};
225
226static struct platform_driver sh_mobile_sdhi_driver = {
227 .driver = {
228 .name = "sh_mobile_sdhi",
229 .owner = THIS_MODULE,
230 .pm = &tmio_mmc_dev_pm_ops,
231 },
232 .probe = sh_mobile_sdhi_probe,
233 .remove = __devexit_p(sh_mobile_sdhi_remove),
234};
235
236static int __init sh_mobile_sdhi_init(void)
237{
238 return platform_driver_register(&sh_mobile_sdhi_driver);
239}
240
241static void __exit sh_mobile_sdhi_exit(void)
242{
243 platform_driver_unregister(&sh_mobile_sdhi_driver);
244}
245
246module_init(sh_mobile_sdhi_init);
247module_exit(sh_mobile_sdhi_exit);
248
249MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
250MODULE_AUTHOR("Magnus Damm");
251MODULE_LICENSE("GPL v2");
252MODULE_ALIAS("platform:sh_mobile_sdhi");
1/*
2 * SuperH Mobile SDHI
3 *
4 * Copyright (C) 2009 Magnus Damm
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Based on "Compaq ASIC3 support":
11 *
12 * Copyright 2001 Compaq Computer Corporation.
13 * Copyright 2004-2005 Phil Blundell
14 * Copyright 2007-2008 OpenedHand Ltd.
15 *
16 * Authors: Phil Blundell <pb@handhelds.org>,
17 * Samuel Ortiz <sameo@openedhand.com>
18 *
19 */
20
21#include <linux/kernel.h>
22#include <linux/clk.h>
23#include <linux/slab.h>
24#include <linux/mod_devicetable.h>
25#include <linux/module.h>
26#include <linux/of_device.h>
27#include <linux/platform_device.h>
28#include <linux/mmc/host.h>
29#include <linux/mmc/sh_mobile_sdhi.h>
30#include <linux/mfd/tmio.h>
31#include <linux/sh_dma.h>
32#include <linux/delay.h>
33
34#include "tmio_mmc.h"
35
36#define EXT_ACC 0xe4
37
38struct sh_mobile_sdhi_of_data {
39 unsigned long tmio_flags;
40 unsigned long capabilities;
41 unsigned long capabilities2;
42};
43
44static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
45 {
46 .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
47 },
48};
49
50static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
51 .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE,
52 .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
53};
54
55static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
56 .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE,
57 .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
58 .capabilities2 = MMC_CAP2_NO_MULTI_READ,
59};
60
61static const struct of_device_id sh_mobile_sdhi_of_match[] = {
62 { .compatible = "renesas,sdhi-shmobile" },
63 { .compatible = "renesas,sdhi-sh7372" },
64 { .compatible = "renesas,sdhi-sh73a0", .data = &sh_mobile_sdhi_of_cfg[0], },
65 { .compatible = "renesas,sdhi-r8a73a4", .data = &sh_mobile_sdhi_of_cfg[0], },
66 { .compatible = "renesas,sdhi-r8a7740", .data = &sh_mobile_sdhi_of_cfg[0], },
67 { .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
68 { .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
69 { .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
70 { .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
71 {},
72};
73MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match);
74
75struct sh_mobile_sdhi {
76 struct clk *clk;
77 struct tmio_mmc_data mmc_data;
78 struct tmio_mmc_dma dma_priv;
79};
80
81static int sh_mobile_sdhi_clk_enable(struct platform_device *pdev, unsigned int *f)
82{
83 struct mmc_host *mmc = platform_get_drvdata(pdev);
84 struct tmio_mmc_host *host = mmc_priv(mmc);
85 struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
86 int ret = clk_prepare_enable(priv->clk);
87 if (ret < 0)
88 return ret;
89
90 *f = clk_get_rate(priv->clk);
91 return 0;
92}
93
94static void sh_mobile_sdhi_clk_disable(struct platform_device *pdev)
95{
96 struct mmc_host *mmc = platform_get_drvdata(pdev);
97 struct tmio_mmc_host *host = mmc_priv(mmc);
98 struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
99 clk_disable_unprepare(priv->clk);
100}
101
102static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
103{
104 int timeout = 1000;
105
106 while (--timeout && !(sd_ctrl_read16(host, CTL_STATUS2) & (1 << 13)))
107 udelay(1);
108
109 if (!timeout) {
110 dev_warn(host->pdata->dev, "timeout waiting for SD bus idle\n");
111 return -EBUSY;
112 }
113
114 return 0;
115}
116
117static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
118{
119 switch (addr)
120 {
121 case CTL_SD_CMD:
122 case CTL_STOP_INTERNAL_ACTION:
123 case CTL_XFER_BLK_COUNT:
124 case CTL_SD_CARD_CLK_CTL:
125 case CTL_SD_XFER_LEN:
126 case CTL_SD_MEM_CARD_OPT:
127 case CTL_TRANSACTION_CTL:
128 case CTL_DMA_ENABLE:
129 return sh_mobile_sdhi_wait_idle(host);
130 }
131
132 return 0;
133}
134
135static void sh_mobile_sdhi_cd_wakeup(const struct platform_device *pdev)
136{
137 mmc_detect_change(platform_get_drvdata(pdev), msecs_to_jiffies(100));
138}
139
140static const struct sh_mobile_sdhi_ops sdhi_ops = {
141 .cd_wakeup = sh_mobile_sdhi_cd_wakeup,
142};
143
144static int sh_mobile_sdhi_probe(struct platform_device *pdev)
145{
146 const struct of_device_id *of_id =
147 of_match_device(sh_mobile_sdhi_of_match, &pdev->dev);
148 struct sh_mobile_sdhi *priv;
149 struct tmio_mmc_data *mmc_data;
150 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
151 struct tmio_mmc_host *host;
152 struct resource *res;
153 int irq, ret, i = 0;
154 bool multiplexed_isr = true;
155 struct tmio_mmc_dma *dma_priv;
156 u16 ver;
157
158 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
159 if (!res)
160 return -EINVAL;
161
162 priv = devm_kzalloc(&pdev->dev, sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
163 if (priv == NULL) {
164 dev_err(&pdev->dev, "kzalloc failed\n");
165 return -ENOMEM;
166 }
167
168 mmc_data = &priv->mmc_data;
169 dma_priv = &priv->dma_priv;
170
171 if (p) {
172 if (p->init) {
173 ret = p->init(pdev, &sdhi_ops);
174 if (ret)
175 return ret;
176 }
177 }
178
179 priv->clk = devm_clk_get(&pdev->dev, NULL);
180 if (IS_ERR(priv->clk)) {
181 ret = PTR_ERR(priv->clk);
182 dev_err(&pdev->dev, "cannot get clock: %d\n", ret);
183 goto eclkget;
184 }
185
186 mmc_data->clk_enable = sh_mobile_sdhi_clk_enable;
187 mmc_data->clk_disable = sh_mobile_sdhi_clk_disable;
188 mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
189 mmc_data->write16_hook = sh_mobile_sdhi_write16_hook;
190 if (p) {
191 mmc_data->flags = p->tmio_flags;
192 mmc_data->ocr_mask = p->tmio_ocr_mask;
193 mmc_data->capabilities |= p->tmio_caps;
194 mmc_data->capabilities2 |= p->tmio_caps2;
195 mmc_data->cd_gpio = p->cd_gpio;
196
197 if (p->dma_slave_tx > 0 && p->dma_slave_rx > 0) {
198 /*
199 * Yes, we have to provide slave IDs twice to TMIO:
200 * once as a filter parameter and once for channel
201 * configuration as an explicit slave ID
202 */
203 dma_priv->chan_priv_tx = (void *)p->dma_slave_tx;
204 dma_priv->chan_priv_rx = (void *)p->dma_slave_rx;
205 dma_priv->slave_id_tx = p->dma_slave_tx;
206 dma_priv->slave_id_rx = p->dma_slave_rx;
207 }
208 }
209
210 dma_priv->alignment_shift = 1; /* 2-byte alignment */
211 dma_priv->filter = shdma_chan_filter;
212
213 mmc_data->dma = dma_priv;
214
215 /*
216 * All SDHI blocks support 2-byte and larger block sizes in 4-bit
217 * bus width mode.
218 */
219 mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
220
221 /*
222 * All SDHI blocks support SDIO IRQ signalling.
223 */
224 mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
225
226 if (of_id && of_id->data) {
227 const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
228 mmc_data->flags |= of_data->tmio_flags;
229 mmc_data->capabilities |= of_data->capabilities;
230 mmc_data->capabilities2 |= of_data->capabilities2;
231 }
232
233 /* SD control register space size is 0x100, 0x200 for bus_shift=1 */
234 mmc_data->bus_shift = resource_size(res) >> 9;
235
236 ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
237 if (ret < 0)
238 goto eprobe;
239
240 /*
241 * FIXME:
242 * this Workaround can be more clever method
243 */
244 ver = sd_ctrl_read16(host, CTL_VERSION);
245 if (ver == 0xCB0D)
246 sd_ctrl_write16(host, EXT_ACC, 1);
247
248 /*
249 * Allow one or more specific (named) ISRs or
250 * one or more multiplexed (un-named) ISRs.
251 */
252
253 irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT);
254 if (irq >= 0) {
255 multiplexed_isr = false;
256 ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_card_detect_irq, 0,
257 dev_name(&pdev->dev), host);
258 if (ret)
259 goto eirq;
260 }
261
262 irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO);
263 if (irq >= 0) {
264 multiplexed_isr = false;
265 ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdio_irq, 0,
266 dev_name(&pdev->dev), host);
267 if (ret)
268 goto eirq;
269 }
270
271 irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDCARD);
272 if (irq >= 0) {
273 multiplexed_isr = false;
274 ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdcard_irq, 0,
275 dev_name(&pdev->dev), host);
276 if (ret)
277 goto eirq;
278 } else if (!multiplexed_isr) {
279 dev_err(&pdev->dev,
280 "Principal SD-card IRQ is missing among named interrupts\n");
281 ret = irq;
282 goto eirq;
283 }
284
285 if (multiplexed_isr) {
286 while (1) {
287 irq = platform_get_irq(pdev, i);
288 if (irq < 0)
289 break;
290 i++;
291 ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0,
292 dev_name(&pdev->dev), host);
293 if (ret)
294 goto eirq;
295 }
296
297 /* There must be at least one IRQ source */
298 if (!i) {
299 ret = irq;
300 goto eirq;
301 }
302 }
303
304 dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
305 mmc_hostname(host->mmc), (unsigned long)
306 (platform_get_resource(pdev, IORESOURCE_MEM, 0)->start),
307 host->mmc->f_max / 1000000);
308
309 return ret;
310
311eirq:
312 tmio_mmc_host_remove(host);
313eprobe:
314eclkget:
315 if (p && p->cleanup)
316 p->cleanup(pdev);
317 return ret;
318}
319
320static int sh_mobile_sdhi_remove(struct platform_device *pdev)
321{
322 struct mmc_host *mmc = platform_get_drvdata(pdev);
323 struct tmio_mmc_host *host = mmc_priv(mmc);
324 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
325
326 tmio_mmc_host_remove(host);
327
328 if (p && p->cleanup)
329 p->cleanup(pdev);
330
331 return 0;
332}
333
334static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
335 SET_SYSTEM_SLEEP_PM_OPS(tmio_mmc_host_suspend, tmio_mmc_host_resume)
336 SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
337 tmio_mmc_host_runtime_resume,
338 NULL)
339};
340
341static struct platform_driver sh_mobile_sdhi_driver = {
342 .driver = {
343 .name = "sh_mobile_sdhi",
344 .owner = THIS_MODULE,
345 .pm = &tmio_mmc_dev_pm_ops,
346 .of_match_table = sh_mobile_sdhi_of_match,
347 },
348 .probe = sh_mobile_sdhi_probe,
349 .remove = sh_mobile_sdhi_remove,
350};
351
352module_platform_driver(sh_mobile_sdhi_driver);
353
354MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
355MODULE_AUTHOR("Magnus Damm");
356MODULE_LICENSE("GPL v2");
357MODULE_ALIAS("platform:sh_mobile_sdhi");