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1/*
2 * Synopsys DesignWare Multimedia Card Interface driver
3 *
4 * Copyright (C) 2009 NXP Semiconductors
5 * Copyright (C) 2009, 2010 Imagination Technologies Ltd.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12
13#include <linux/interrupt.h>
14#include <linux/module.h>
15#include <linux/io.h>
16#include <linux/irq.h>
17#include <linux/platform_device.h>
18#include <linux/slab.h>
19#include <linux/mmc/host.h>
20#include <linux/mmc/mmc.h>
21#include <linux/mmc/dw_mmc.h>
22#include "dw_mmc.h"
23
24static int dw_mci_pltfm_probe(struct platform_device *pdev)
25{
26 struct dw_mci *host;
27 struct resource *regs;
28 int ret;
29
30 host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL);
31 if (!host)
32 return -ENOMEM;
33
34 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
35 if (!regs) {
36 ret = -ENXIO;
37 goto err_free;
38 }
39
40 host->irq = platform_get_irq(pdev, 0);
41 if (host->irq < 0) {
42 ret = host->irq;
43 goto err_free;
44 }
45
46 host->dev = pdev->dev;
47 host->irq_flags = 0;
48 host->pdata = pdev->dev.platform_data;
49 ret = -ENOMEM;
50 host->regs = ioremap(regs->start, resource_size(regs));
51 if (!host->regs)
52 goto err_free;
53 platform_set_drvdata(pdev, host);
54 ret = dw_mci_probe(host);
55 if (ret)
56 goto err_out;
57 return ret;
58err_out:
59 iounmap(host->regs);
60err_free:
61 kfree(host);
62 return ret;
63}
64
65static int __exit dw_mci_pltfm_remove(struct platform_device *pdev)
66{
67 struct dw_mci *host = platform_get_drvdata(pdev);
68
69 platform_set_drvdata(pdev, NULL);
70 dw_mci_remove(host);
71 iounmap(host->regs);
72 kfree(host);
73 return 0;
74}
75
76#ifdef CONFIG_PM_SLEEP
77/*
78 * TODO: we should probably disable the clock to the card in the suspend path.
79 */
80static int dw_mci_pltfm_suspend(struct device *dev)
81{
82 int ret;
83 struct dw_mci *host = dev_get_drvdata(dev);
84
85 ret = dw_mci_suspend(host);
86 if (ret)
87 return ret;
88
89 return 0;
90}
91
92static int dw_mci_pltfm_resume(struct device *dev)
93{
94 int ret;
95 struct dw_mci *host = dev_get_drvdata(dev);
96
97 ret = dw_mci_resume(host);
98 if (ret)
99 return ret;
100
101 return 0;
102}
103#else
104#define dw_mci_pltfm_suspend NULL
105#define dw_mci_pltfm_resume NULL
106#endif /* CONFIG_PM_SLEEP */
107
108static SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
109
110static struct platform_driver dw_mci_pltfm_driver = {
111 .remove = __exit_p(dw_mci_pltfm_remove),
112 .driver = {
113 .name = "dw_mmc",
114 .pm = &dw_mci_pltfm_pmops,
115 },
116};
117
118static int __init dw_mci_init(void)
119{
120 return platform_driver_probe(&dw_mci_pltfm_driver, dw_mci_pltfm_probe);
121}
122
123static void __exit dw_mci_exit(void)
124{
125 platform_driver_unregister(&dw_mci_pltfm_driver);
126}
127
128module_init(dw_mci_init);
129module_exit(dw_mci_exit);
130
131MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
132MODULE_AUTHOR("NXP Semiconductor VietNam");
133MODULE_AUTHOR("Imagination Technologies Ltd");
134MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Synopsys DesignWare Multimedia Card Interface driver
4 *
5 * Copyright (C) 2009 NXP Semiconductors
6 * Copyright (C) 2009, 2010 Imagination Technologies Ltd.
7 */
8
9#include <linux/err.h>
10#include <linux/interrupt.h>
11#include <linux/module.h>
12#include <linux/io.h>
13#include <linux/irq.h>
14#include <linux/platform_device.h>
15#include <linux/pm_runtime.h>
16#include <linux/slab.h>
17#include <linux/mmc/host.h>
18#include <linux/mmc/mmc.h>
19#include <linux/of.h>
20#include <linux/mfd/altera-sysmgr.h>
21#include <linux/regmap.h>
22
23#include "dw_mmc.h"
24#include "dw_mmc-pltfm.h"
25
26#define SOCFPGA_DW_MMC_CLK_PHASE_STEP 45
27#define SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel, reg_shift) \
28 ((((smplsel) & 0x7) << reg_shift) | (((drvsel) & 0x7) << 0))
29
30int dw_mci_pltfm_register(struct platform_device *pdev,
31 const struct dw_mci_drv_data *drv_data)
32{
33 struct dw_mci *host;
34 struct resource *regs;
35
36 host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
37 if (!host)
38 return -ENOMEM;
39
40 host->irq = platform_get_irq(pdev, 0);
41 if (host->irq < 0)
42 return host->irq;
43
44 host->drv_data = drv_data;
45 host->dev = &pdev->dev;
46 host->irq_flags = 0;
47 host->pdata = pdev->dev.platform_data;
48
49 host->regs = devm_platform_get_and_ioremap_resource(pdev, 0, ®s);
50 if (IS_ERR(host->regs))
51 return PTR_ERR(host->regs);
52
53 /* Get registers' physical base address */
54 host->phy_regs = regs->start;
55
56 platform_set_drvdata(pdev, host);
57 return dw_mci_probe(host);
58}
59EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
60
61const struct dev_pm_ops dw_mci_pltfm_pmops = {
62 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
63 pm_runtime_force_resume)
64 SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
65 dw_mci_runtime_resume,
66 NULL)
67};
68EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
69
70static int dw_mci_socfpga_priv_init(struct dw_mci *host)
71{
72 struct device_node *np = host->dev->of_node;
73 struct regmap *sys_mgr_base_addr;
74 u32 clk_phase[2] = {0}, reg_offset, reg_shift;
75 int i, rc, hs_timing;
76
77 rc = of_property_read_variable_u32_array(np, "clk-phase-sd-hs", &clk_phase[0], 2, 0);
78 if (rc < 0)
79 return 0;
80
81 sys_mgr_base_addr = altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
82 if (IS_ERR(sys_mgr_base_addr)) {
83 dev_warn(host->dev, "clk-phase-sd-hs was specified, but failed to find altr,sys-mgr regmap!\n");
84 return 0;
85 }
86
87 of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, ®_offset);
88 of_property_read_u32_index(np, "altr,sysmgr-syscon", 2, ®_shift);
89
90 for (i = 0; i < ARRAY_SIZE(clk_phase); i++)
91 clk_phase[i] /= SOCFPGA_DW_MMC_CLK_PHASE_STEP;
92
93 hs_timing = SYSMGR_SDMMC_CTRL_SET(clk_phase[0], clk_phase[1], reg_shift);
94 regmap_write(sys_mgr_base_addr, reg_offset, hs_timing);
95
96 return 0;
97}
98
99static const struct dw_mci_drv_data socfpga_drv_data = {
100 .init = dw_mci_socfpga_priv_init,
101};
102
103static const struct of_device_id dw_mci_pltfm_match[] = {
104 { .compatible = "snps,dw-mshc", },
105 { .compatible = "altr,socfpga-dw-mshc", .data = &socfpga_drv_data, },
106 { .compatible = "img,pistachio-dw-mshc", },
107 {},
108};
109MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
110
111static int dw_mci_pltfm_probe(struct platform_device *pdev)
112{
113 const struct dw_mci_drv_data *drv_data = NULL;
114 const struct of_device_id *match;
115
116 if (pdev->dev.of_node) {
117 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
118 drv_data = match->data;
119 }
120
121 return dw_mci_pltfm_register(pdev, drv_data);
122}
123
124void dw_mci_pltfm_remove(struct platform_device *pdev)
125{
126 struct dw_mci *host = platform_get_drvdata(pdev);
127
128 dw_mci_remove(host);
129}
130EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
131
132static struct platform_driver dw_mci_pltfm_driver = {
133 .probe = dw_mci_pltfm_probe,
134 .remove = dw_mci_pltfm_remove,
135 .driver = {
136 .name = "dw_mmc",
137 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
138 .of_match_table = dw_mci_pltfm_match,
139 .pm = &dw_mci_pltfm_pmops,
140 },
141};
142
143module_platform_driver(dw_mci_pltfm_driver);
144
145MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
146MODULE_AUTHOR("NXP Semiconductor VietNam");
147MODULE_AUTHOR("Imagination Technologies Ltd");
148MODULE_LICENSE("GPL v2");