2 * sdhci-pltfm.c Support for SDHCI platform devices
3 * Copyright (c) 2009 Intel Corporation
5 * Copyright (c) 2007, 2011 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
) ||
46 of_get_property(np
, "wp-inverted", NULL
))
49 /* Old device trees don't have the wp-inverted property. */
51 return machine_is(mpc837x_rdb
) || machine_is(mpc837x_mds
);
54 #endif /* CONFIG_PPC */
57 void sdhci_get_of_property(struct platform_device
*pdev
)
59 struct device_node
*np
= pdev
->dev
.of_node
;
60 struct sdhci_host
*host
= platform_get_drvdata(pdev
);
61 struct sdhci_pltfm_host
*pltfm_host
= sdhci_priv(host
);
66 if (of_device_is_available(np
)) {
67 if (of_get_property(np
, "sdhci,auto-cmd12", NULL
))
68 host
->quirks
|= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12
;
70 if (of_get_property(np
, "sdhci,1-bit-only", NULL
) ||
71 (of_property_read_u32(np
, "bus-width", &bus_width
) == 0 &&
73 host
->quirks
|= SDHCI_QUIRK_FORCE_1_BIT_DATA
;
75 if (sdhci_of_wp_inverted(np
))
76 host
->quirks
|= SDHCI_QUIRK_INVERTED_WRITE_PROTECT
;
78 if (of_device_is_compatible(np
, "fsl,p2020-rev1-esdhc"))
79 host
->quirks
|= SDHCI_QUIRK_BROKEN_DMA
;
81 if (of_device_is_compatible(np
, "fsl,p2020-esdhc") ||
82 of_device_is_compatible(np
, "fsl,p1010-esdhc") ||
83 of_device_is_compatible(np
, "fsl,mpc8536-esdhc"))
84 host
->quirks
|= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL
;
86 clk
= of_get_property(np
, "clock-frequency", &size
);
87 if (clk
&& size
== sizeof(*clk
) && *clk
)
88 pltfm_host
->clock
= be32_to_cpup(clk
);
92 void sdhci_get_of_property(struct platform_device
*pdev
) {}
93 #endif /* CONFIG_OF */
94 EXPORT_SYMBOL_GPL(sdhci_get_of_property
);
96 struct sdhci_host
*sdhci_pltfm_init(struct platform_device
*pdev
,
97 struct sdhci_pltfm_data
*pdata
)
99 struct sdhci_host
*host
;
100 struct sdhci_pltfm_host
*pltfm_host
;
101 struct device_node
*np
= pdev
->dev
.of_node
;
102 struct resource
*iomem
;
105 iomem
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
111 if (resource_size(iomem
) < 0x100)
112 dev_err(&pdev
->dev
, "Invalid iomem size!\n");
114 /* Some PCI-based MFD need the parent here */
115 if (pdev
->dev
.parent
!= &platform_bus
&& !np
)
116 host
= sdhci_alloc_host(pdev
->dev
.parent
, sizeof(*pltfm_host
));
118 host
= sdhci_alloc_host(&pdev
->dev
, sizeof(*pltfm_host
));
125 pltfm_host
= sdhci_priv(host
);
127 host
->hw_name
= dev_name(&pdev
->dev
);
128 if (pdata
&& pdata
->ops
)
129 host
->ops
= pdata
->ops
;
131 host
->ops
= &sdhci_pltfm_ops
;
133 host
->quirks
= pdata
->quirks
;
134 host
->irq
= platform_get_irq(pdev
, 0);
136 if (!request_mem_region(iomem
->start
, resource_size(iomem
),
137 mmc_hostname(host
->mmc
))) {
138 dev_err(&pdev
->dev
, "cannot request region\n");
143 host
->ioaddr
= ioremap(iomem
->start
, resource_size(iomem
));
145 dev_err(&pdev
->dev
, "failed to remap registers\n");
150 platform_set_drvdata(pdev
, host
);
155 release_mem_region(iomem
->start
, resource_size(iomem
));
157 sdhci_free_host(host
);
159 dev_err(&pdev
->dev
, "%s failed %d\n", __func__
, ret
);
162 EXPORT_SYMBOL_GPL(sdhci_pltfm_init
);
164 void sdhci_pltfm_free(struct platform_device
*pdev
)
166 struct sdhci_host
*host
= platform_get_drvdata(pdev
);
167 struct resource
*iomem
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
169 iounmap(host
->ioaddr
);
170 release_mem_region(iomem
->start
, resource_size(iomem
));
171 sdhci_free_host(host
);
172 platform_set_drvdata(pdev
, NULL
);
174 EXPORT_SYMBOL_GPL(sdhci_pltfm_free
);
176 int sdhci_pltfm_register(struct platform_device
*pdev
,
177 struct sdhci_pltfm_data
*pdata
)
179 struct sdhci_host
*host
;
182 host
= sdhci_pltfm_init(pdev
, pdata
);
184 return PTR_ERR(host
);
186 sdhci_get_of_property(pdev
);
188 ret
= sdhci_add_host(host
);
190 sdhci_pltfm_free(pdev
);
194 EXPORT_SYMBOL_GPL(sdhci_pltfm_register
);
196 int sdhci_pltfm_unregister(struct platform_device
*pdev
)
198 struct sdhci_host
*host
= platform_get_drvdata(pdev
);
199 int dead
= (readl(host
->ioaddr
+ SDHCI_INT_STATUS
) == 0xffffffff);
201 sdhci_remove_host(host
, dead
);
202 sdhci_pltfm_free(pdev
);
206 EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister
);
209 static int sdhci_pltfm_suspend(struct device
*dev
)
211 struct sdhci_host
*host
= dev_get_drvdata(dev
);
213 return sdhci_suspend_host(host
);
216 static int sdhci_pltfm_resume(struct device
*dev
)
218 struct sdhci_host
*host
= dev_get_drvdata(dev
);
220 return sdhci_resume_host(host
);
223 const struct dev_pm_ops sdhci_pltfm_pmops
= {
224 .suspend
= sdhci_pltfm_suspend
,
225 .resume
= sdhci_pltfm_resume
,
227 EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops
);
228 #endif /* CONFIG_PM */
230 static int __init
sdhci_pltfm_drv_init(void)
232 pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
236 module_init(sdhci_pltfm_drv_init
);
238 static void __exit
sdhci_pltfm_drv_exit(void)
241 module_exit(sdhci_pltfm_drv_exit
);
243 MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
244 MODULE_AUTHOR("Intel Corporation");
245 MODULE_LICENSE("GPL v2");