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");