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