1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
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/platform_device.h>
27#include <linux/mmc/host.h>
28#include <linux/mmc/sh_mobile_sdhi.h>
29#include <linux/mfd/tmio.h>
30#include <linux/sh_dma.h>
31#include <linux/delay.h>
32
33#include "tmio_mmc.h"
34
35struct sh_mobile_sdhi {
36 struct clk *clk;
37 struct tmio_mmc_data mmc_data;
38 struct sh_dmae_slave param_tx;
39 struct sh_dmae_slave param_rx;
40 struct tmio_mmc_dma dma_priv;
41};
42
43static int sh_mobile_sdhi_clk_enable(struct platform_device *pdev, unsigned int *f)
44{
45 struct mmc_host *mmc = dev_get_drvdata(&pdev->dev);
46 struct tmio_mmc_host *host = mmc_priv(mmc);
47 struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
48 int ret = clk_enable(priv->clk);
49 if (ret < 0)
50 return ret;
51
52 *f = clk_get_rate(priv->clk);
53 return 0;
54}
55
56static void sh_mobile_sdhi_clk_disable(struct platform_device *pdev)
57{
58 struct mmc_host *mmc = dev_get_drvdata(&pdev->dev);
59 struct tmio_mmc_host *host = mmc_priv(mmc);
60 struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
61 clk_disable(priv->clk);
62}
63
64static void sh_mobile_sdhi_set_pwr(struct platform_device *pdev, int state)
65{
66 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
67
68 p->set_pwr(pdev, state);
69}
70
71static int sh_mobile_sdhi_get_cd(struct platform_device *pdev)
72{
73 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
74
75 return p->get_cd(pdev);
76}
77
78static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
79{
80 int timeout = 1000;
81
82 while (--timeout && !(sd_ctrl_read16(host, CTL_STATUS2) & (1 << 13)))
83 udelay(1);
84
85 if (!timeout) {
86 dev_warn(host->pdata->dev, "timeout waiting for SD bus idle\n");
87 return -EBUSY;
88 }
89
90 return 0;
91}
92
93static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
94{
95 switch (addr)
96 {
97 case CTL_SD_CMD:
98 case CTL_STOP_INTERNAL_ACTION:
99 case CTL_XFER_BLK_COUNT:
100 case CTL_SD_CARD_CLK_CTL:
101 case CTL_SD_XFER_LEN:
102 case CTL_SD_MEM_CARD_OPT:
103 case CTL_TRANSACTION_CTL:
104 case CTL_DMA_ENABLE:
105 return sh_mobile_sdhi_wait_idle(host);
106 }
107
108 return 0;
109}
110
111static void sh_mobile_sdhi_cd_wakeup(const struct platform_device *pdev)
112{
113 mmc_detect_change(dev_get_drvdata(&pdev->dev), msecs_to_jiffies(100));
114}
115
116static const struct sh_mobile_sdhi_ops sdhi_ops = {
117 .cd_wakeup = sh_mobile_sdhi_cd_wakeup,
118};
119
120static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
121{
122 struct sh_mobile_sdhi *priv;
123 struct tmio_mmc_data *mmc_data;
124 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
125 struct tmio_mmc_host *host;
126 char clk_name[8];
127 int irq, ret, i = 0;
128 bool multiplexed_isr = true;
129
130 priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
131 if (priv == NULL) {
132 dev_err(&pdev->dev, "kzalloc failed\n");
133 return -ENOMEM;
134 }
135
136 mmc_data = &priv->mmc_data;
137
138 if (p) {
139 p->pdata = mmc_data;
140 if (p->init) {
141 ret = p->init(pdev, &sdhi_ops);
142 if (ret)
143 goto einit;
144 }
145 }
146
147 snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
148 priv->clk = clk_get(&pdev->dev, clk_name);
149 if (IS_ERR(priv->clk)) {
150 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
151 ret = PTR_ERR(priv->clk);
152 goto eclkget;
153 }
154
155 mmc_data->clk_enable = sh_mobile_sdhi_clk_enable;
156 mmc_data->clk_disable = sh_mobile_sdhi_clk_disable;
157 mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
158 if (p) {
159 mmc_data->flags = p->tmio_flags;
160 if (mmc_data->flags & TMIO_MMC_HAS_IDLE_WAIT)
161 mmc_data->write16_hook = sh_mobile_sdhi_write16_hook;
162 mmc_data->ocr_mask = p->tmio_ocr_mask;
163 mmc_data->capabilities |= p->tmio_caps;
164 mmc_data->capabilities2 |= p->tmio_caps2;
165 mmc_data->cd_gpio = p->cd_gpio;
166 if (p->set_pwr)
167 mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
168 if (p->get_cd)
169 mmc_data->get_cd = sh_mobile_sdhi_get_cd;
170
171 if (p->dma_slave_tx > 0 && p->dma_slave_rx > 0) {
172 priv->param_tx.shdma_slave.slave_id = p->dma_slave_tx;
173 priv->param_rx.shdma_slave.slave_id = p->dma_slave_rx;
174 priv->dma_priv.chan_priv_tx = &priv->param_tx.shdma_slave;
175 priv->dma_priv.chan_priv_rx = &priv->param_rx.shdma_slave;
176 priv->dma_priv.alignment_shift = 1;
177 mmc_data->dma = &priv->dma_priv;
178 }
179 }
180
181
182
183
184
185 mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
186
187
188
189
190 mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
191
192 ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
193 if (ret < 0)
194 goto eprobe;
195
196
197
198
199
200
201 irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT);
202 if (irq >= 0) {
203 multiplexed_isr = false;
204 ret = request_irq(irq, tmio_mmc_card_detect_irq, 0,
205 dev_name(&pdev->dev), host);
206 if (ret)
207 goto eirq_card_detect;
208 }
209
210 irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO);
211 if (irq >= 0) {
212 multiplexed_isr = false;
213 ret = request_irq(irq, tmio_mmc_sdio_irq, 0,
214 dev_name(&pdev->dev), host);
215 if (ret)
216 goto eirq_sdio;
217 }
218
219 irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDCARD);
220 if (irq >= 0) {
221 multiplexed_isr = false;
222 ret = request_irq(irq, tmio_mmc_sdcard_irq, 0,
223 dev_name(&pdev->dev), host);
224 if (ret)
225 goto eirq_sdcard;
226 } else if (!multiplexed_isr) {
227 dev_err(&pdev->dev,
228 "Principal SD-card IRQ is missing among named interrupts\n");
229 ret = irq;
230 goto eirq_sdcard;
231 }
232
233 if (multiplexed_isr) {
234 while (1) {
235 irq = platform_get_irq(pdev, i);
236 if (irq < 0)
237 break;
238 i++;
239 ret = request_irq(irq, tmio_mmc_irq, 0,
240 dev_name(&pdev->dev), host);
241 if (ret)
242 goto eirq_multiplexed;
243 }
244
245
246 if (!i)
247 goto eirq_multiplexed;
248 }
249
250 dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
251 mmc_hostname(host->mmc), (unsigned long)
252 (platform_get_resource(pdev, IORESOURCE_MEM, 0)->start),
253 mmc_data->hclk / 1000000);
254
255 return ret;
256
257eirq_multiplexed:
258 while (i--) {
259 irq = platform_get_irq(pdev, i);
260 free_irq(irq, host);
261 }
262eirq_sdcard:
263 irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO);
264 if (irq >= 0)
265 free_irq(irq, host);
266eirq_sdio:
267 irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT);
268 if (irq >= 0)
269 free_irq(irq, host);
270eirq_card_detect:
271 tmio_mmc_host_remove(host);
272eprobe:
273 clk_put(priv->clk);
274eclkget:
275 if (p && p->cleanup)
276 p->cleanup(pdev);
277einit:
278 kfree(priv);
279 return ret;
280}
281
282static int sh_mobile_sdhi_remove(struct platform_device *pdev)
283{
284 struct mmc_host *mmc = platform_get_drvdata(pdev);
285 struct tmio_mmc_host *host = mmc_priv(mmc);
286 struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
287 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
288 int i = 0, irq;
289
290 if (p)
291 p->pdata = NULL;
292
293 tmio_mmc_host_remove(host);
294
295 while (1) {
296 irq = platform_get_irq(pdev, i++);
297 if (irq < 0)
298 break;
299 free_irq(irq, host);
300 }
301
302 clk_put(priv->clk);
303
304 if (p && p->cleanup)
305 p->cleanup(pdev);
306
307 kfree(priv);
308
309 return 0;
310}
311
312static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
313 .suspend = tmio_mmc_host_suspend,
314 .resume = tmio_mmc_host_resume,
315 .runtime_suspend = tmio_mmc_host_runtime_suspend,
316 .runtime_resume = tmio_mmc_host_runtime_resume,
317};
318
319static const struct of_device_id sh_mobile_sdhi_of_match[] = {
320 { .compatible = "renesas,shmobile-sdhi" },
321 { }
322};
323MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match);
324
325static struct platform_driver sh_mobile_sdhi_driver = {
326 .driver = {
327 .name = "sh_mobile_sdhi",
328 .owner = THIS_MODULE,
329 .pm = &tmio_mmc_dev_pm_ops,
330 .of_match_table = sh_mobile_sdhi_of_match,
331 },
332 .probe = sh_mobile_sdhi_probe,
333 .remove = __devexit_p(sh_mobile_sdhi_remove),
334};
335
336module_platform_driver(sh_mobile_sdhi_driver);
337
338MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
339MODULE_AUTHOR("Magnus Damm");
340MODULE_LICENSE("GPL v2");
341MODULE_ALIAS("platform:sh_mobile_sdhi");
342
