2 * sdhci-brcmstb.c Support for SDHCI on Broadcom BRCMSTB SoC's
4 * Copyright (C) 2015 Broadcom Corporation
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.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
18 #include <linux/mmc/host.h>
19 #include <linux/module.h>
22 #include "sdhci-pltfm.h"
24 #ifdef CONFIG_PM_SLEEP
26 static int sdhci_brcmstb_suspend(struct device
*dev
)
28 struct sdhci_host
*host
= dev_get_drvdata(dev
);
29 struct sdhci_pltfm_host
*pltfm_host
= sdhci_priv(host
);
32 if (host
->tuning_mode
!= SDHCI_TUNING_MODE_3
)
33 mmc_retune_needed(host
->mmc
);
35 res
= sdhci_suspend_host(host
);
38 clk_disable_unprepare(pltfm_host
->clk
);
42 static int sdhci_brcmstb_resume(struct device
*dev
)
44 struct sdhci_host
*host
= dev_get_drvdata(dev
);
45 struct sdhci_pltfm_host
*pltfm_host
= sdhci_priv(host
);
48 err
= clk_prepare_enable(pltfm_host
->clk
);
51 return sdhci_resume_host(host
);
54 #endif /* CONFIG_PM_SLEEP */
56 static SIMPLE_DEV_PM_OPS(sdhci_brcmstb_pmops
, sdhci_brcmstb_suspend
,
57 sdhci_brcmstb_resume
);
59 static const struct sdhci_ops sdhci_brcmstb_ops
= {
60 .set_clock
= sdhci_set_clock
,
61 .set_bus_width
= sdhci_set_bus_width
,
63 .set_uhs_signaling
= sdhci_set_uhs_signaling
,
66 static struct sdhci_pltfm_data sdhci_brcmstb_pdata
= {
67 .ops
= &sdhci_brcmstb_ops
,
70 static int sdhci_brcmstb_probe(struct platform_device
*pdev
)
72 struct sdhci_host
*host
;
73 struct sdhci_pltfm_host
*pltfm_host
;
77 clk
= devm_clk_get(&pdev
->dev
, NULL
);
79 dev_err(&pdev
->dev
, "Clock not found in Device Tree\n");
82 res
= clk_prepare_enable(clk
);
86 host
= sdhci_pltfm_init(pdev
, &sdhci_brcmstb_pdata
, 0);
92 /* Enable MMC_CAP2_HC_ERASE_SZ for better max discard calculations */
93 host
->mmc
->caps2
|= MMC_CAP2_HC_ERASE_SZ
;
95 sdhci_get_of_property(pdev
);
96 mmc_of_parse(host
->mmc
);
99 * Supply the existing CAPS, but clear the UHS modes. This
100 * will allow these modes to be specified by device tree
101 * properties through mmc_of_parse().
103 host
->caps
= sdhci_readl(host
, SDHCI_CAPABILITIES
);
104 if (of_device_is_compatible(pdev
->dev
.of_node
, "brcm,bcm7425-sdhci"))
105 host
->caps
&= ~SDHCI_CAN_64BIT
;
106 host
->caps1
= sdhci_readl(host
, SDHCI_CAPABILITIES_1
);
107 host
->caps1
&= ~(SDHCI_SUPPORT_SDR50
| SDHCI_SUPPORT_SDR104
|
108 SDHCI_SUPPORT_DDR50
);
109 host
->quirks
|= SDHCI_QUIRK_MISSING_CAPS
|
110 SDHCI_QUIRK_BROKEN_TIMEOUT_VAL
;
112 res
= sdhci_add_host(host
);
116 pltfm_host
= sdhci_priv(host
);
117 pltfm_host
->clk
= clk
;
121 sdhci_pltfm_free(pdev
);
123 clk_disable_unprepare(clk
);
127 static const struct of_device_id sdhci_brcm_of_match
[] = {
128 { .compatible
= "brcm,bcm7425-sdhci" },
129 { .compatible
= "brcm,bcm7445-sdhci" },
132 MODULE_DEVICE_TABLE(of
, sdhci_brcm_of_match
);
134 static struct platform_driver sdhci_brcmstb_driver
= {
136 .name
= "sdhci-brcmstb",
137 .pm
= &sdhci_brcmstb_pmops
,
138 .of_match_table
= of_match_ptr(sdhci_brcm_of_match
),
140 .probe
= sdhci_brcmstb_probe
,
141 .remove
= sdhci_pltfm_unregister
,
144 module_platform_driver(sdhci_brcmstb_driver
);
146 MODULE_DESCRIPTION("SDHCI driver for Broadcom BRCMSTB SoCs");
147 MODULE_AUTHOR("Broadcom");
148 MODULE_LICENSE("GPL v2");