2 * sdhci-pltfm.c Support for SDHCI platform devices
3 * Copyright (c) 2009 Intel Corporation
5 * Copyright (c) 2007 Freescale Semiconductor, Inc.
6 * Copyright (c) 2009 MontaVista Software, Inc.
8 * Authors: Xiaobo Xie <X.Xie@freescale.com>
9 * Anton Vorontsov <avorontsov@ru.mvista.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 * SDHCI platform devices
28 * Inspired by sdhci-pci.c, by Pierre Ossman
31 #include <linux/err.h>
32 #include <linux/module.h>
35 #include <asm/machdep.h>
37 #include "sdhci-pltfm.h"
39 static struct sdhci_ops sdhci_pltfm_ops
= {
43 static bool sdhci_of_wp_inverted(struct device_node
*np
)
45 if (of_get_property(np
, "sdhci,wp-inverted", NULL
))
48 /* Old device trees don't have the wp-inverted property. */
50 return machine_is(mpc837x_rdb
) || machine_is(mpc837x_mds
);
53 #endif /* CONFIG_PPC */
56 void sdhci_get_of_property(struct platform_device
*pdev
)
58 struct device_node
*np
= pdev
->dev
.of_node
;
59 struct sdhci_host
*host
= platform_get_drvdata(pdev
);
60 struct sdhci_pltfm_host
*pltfm_host
= sdhci_priv(host
);
64 if (of_device_is_available(np
)) {
65 if (of_get_property(np
, "sdhci,auto-cmd12", NULL
))
66 host
->quirks
|= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12
;
68 if (of_get_property(np
, "sdhci,1-bit-only", NULL
))
69 host
->quirks
|= SDHCI_QUIRK_FORCE_1_BIT_DATA
;
71 if (sdhci_of_wp_inverted(np
))
72 host
->quirks
|= SDHCI_QUIRK_INVERTED_WRITE_PROTECT
;
74 clk
= of_get_property(np
, "clock-frequency", &size
);
75 if (clk
&& size
== sizeof(*clk
) && *clk
)
76 pltfm_host
->clock
= be32_to_cpup(clk
);
80 void sdhci_get_of_property(struct platform_device
*pdev
) {}
81 #endif /* CONFIG_OF */
82 EXPORT_SYMBOL_GPL(sdhci_get_of_property
);
84 struct sdhci_host
*sdhci_pltfm_init(struct platform_device
*pdev
,
85 struct sdhci_pltfm_data
*pdata
)
87 struct sdhci_host
*host
;
88 struct sdhci_pltfm_host
*pltfm_host
;
89 struct device_node
*np
= pdev
->dev
.of_node
;
90 struct resource
*iomem
;
93 iomem
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
99 if (resource_size(iomem
) < 0x100)
100 dev_err(&pdev
->dev
, "Invalid iomem size!\n");
102 /* Some PCI-based MFD need the parent here */
103 if (pdev
->dev
.parent
!= &platform_bus
&& !np
)
104 host
= sdhci_alloc_host(pdev
->dev
.parent
, sizeof(*pltfm_host
));
106 host
= sdhci_alloc_host(&pdev
->dev
, sizeof(*pltfm_host
));
113 pltfm_host
= sdhci_priv(host
);
115 host
->hw_name
= dev_name(&pdev
->dev
);
116 if (pdata
&& pdata
->ops
)
117 host
->ops
= pdata
->ops
;
119 host
->ops
= &sdhci_pltfm_ops
;
121 host
->quirks
= pdata
->quirks
;
122 host
->irq
= platform_get_irq(pdev
, 0);
124 if (!request_mem_region(iomem
->start
, resource_size(iomem
),
125 mmc_hostname(host
->mmc
))) {
126 dev_err(&pdev
->dev
, "cannot request region\n");
131 host
->ioaddr
= ioremap(iomem
->start
, resource_size(iomem
));
133 dev_err(&pdev
->dev
, "failed to remap registers\n");
138 platform_set_drvdata(pdev
, host
);
143 release_mem_region(iomem
->start
, resource_size(iomem
));
145 sdhci_free_host(host
);
147 dev_err(&pdev
->dev
, "%s failed %d\n", __func__
, ret
);
150 EXPORT_SYMBOL_GPL(sdhci_pltfm_init
);
152 void sdhci_pltfm_free(struct platform_device
*pdev
)
154 struct sdhci_host
*host
= platform_get_drvdata(pdev
);
155 struct resource
*iomem
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
157 iounmap(host
->ioaddr
);
158 release_mem_region(iomem
->start
, resource_size(iomem
));
159 sdhci_free_host(host
);
160 platform_set_drvdata(pdev
, NULL
);
162 EXPORT_SYMBOL_GPL(sdhci_pltfm_free
);
164 int sdhci_pltfm_register(struct platform_device
*pdev
,
165 struct sdhci_pltfm_data
*pdata
)
167 struct sdhci_host
*host
;
170 host
= sdhci_pltfm_init(pdev
, pdata
);
172 return PTR_ERR(host
);
174 sdhci_get_of_property(pdev
);
176 ret
= sdhci_add_host(host
);
178 sdhci_pltfm_free(pdev
);
182 EXPORT_SYMBOL_GPL(sdhci_pltfm_register
);
184 int sdhci_pltfm_unregister(struct platform_device
*pdev
)
186 struct sdhci_host
*host
= platform_get_drvdata(pdev
);
187 int dead
= (readl(host
->ioaddr
+ SDHCI_INT_STATUS
) == 0xffffffff);
189 sdhci_remove_host(host
, dead
);
190 sdhci_pltfm_free(pdev
);
194 EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister
);
197 int sdhci_pltfm_suspend(struct platform_device
*dev
, pm_message_t state
)
199 struct sdhci_host
*host
= platform_get_drvdata(dev
);
201 return sdhci_suspend_host(host
, state
);
203 EXPORT_SYMBOL_GPL(sdhci_pltfm_suspend
);
205 int sdhci_pltfm_resume(struct platform_device
*dev
)
207 struct sdhci_host
*host
= platform_get_drvdata(dev
);
209 return sdhci_resume_host(host
);
211 EXPORT_SYMBOL_GPL(sdhci_pltfm_resume
);
212 #endif /* CONFIG_PM */
214 static int __init
sdhci_pltfm_drv_init(void)
216 pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
220 module_init(sdhci_pltfm_drv_init
);
222 static void __exit
sdhci_pltfm_drv_exit(void)
225 module_exit(sdhci_pltfm_drv_exit
);
227 MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
228 MODULE_AUTHOR("Intel Corporation");
229 MODULE_LICENSE("GPL v2");