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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 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
50 host->regs = devm_ioremap_resource(&pdev->dev, regs);
51 if (IS_ERR(host->regs))
52 return PTR_ERR(host->regs);
53
54 /* Get registers' physical base address */
55 host->phy_regs = regs->start;
56
57 platform_set_drvdata(pdev, host);
58 return dw_mci_probe(host);
59}
60EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
61
62const struct dev_pm_ops dw_mci_pltfm_pmops = {
63 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
64 pm_runtime_force_resume)
65 SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
66 dw_mci_runtime_resume,
67 NULL)
68};
69EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
70
71static int dw_mci_socfpga_priv_init(struct dw_mci *host)
72{
73 struct device_node *np = host->dev->of_node;
74 struct regmap *sys_mgr_base_addr;
75 u32 clk_phase[2] = {0}, reg_offset, reg_shift;
76 int i, rc, hs_timing;
77
78 rc = of_property_read_variable_u32_array(np, "clk-phase-sd-hs", &clk_phase[0], 2, 0);
79 if (rc < 0)
80 return 0;
81
82 sys_mgr_base_addr = altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
83 if (IS_ERR(sys_mgr_base_addr)) {
84 dev_warn(host->dev, "clk-phase-sd-hs was specified, but failed to find altr,sys-mgr regmap!\n");
85 return 0;
86 }
87
88 of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, ®_offset);
89 of_property_read_u32_index(np, "altr,sysmgr-syscon", 2, ®_shift);
90
91 for (i = 0; i < ARRAY_SIZE(clk_phase); i++)
92 clk_phase[i] /= SOCFPGA_DW_MMC_CLK_PHASE_STEP;
93
94 hs_timing = SYSMGR_SDMMC_CTRL_SET(clk_phase[0], clk_phase[1], reg_shift);
95 regmap_write(sys_mgr_base_addr, reg_offset, hs_timing);
96
97 return 0;
98}
99
100static const struct dw_mci_drv_data socfpga_drv_data = {
101 .init = dw_mci_socfpga_priv_init,
102};
103
104static const struct of_device_id dw_mci_pltfm_match[] = {
105 { .compatible = "snps,dw-mshc", },
106 { .compatible = "altr,socfpga-dw-mshc", .data = &socfpga_drv_data, },
107 { .compatible = "img,pistachio-dw-mshc", },
108 {},
109};
110MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
111
112static int dw_mci_pltfm_probe(struct platform_device *pdev)
113{
114 const struct dw_mci_drv_data *drv_data = NULL;
115 const struct of_device_id *match;
116
117 if (pdev->dev.of_node) {
118 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
119 drv_data = match->data;
120 }
121
122 return dw_mci_pltfm_register(pdev, drv_data);
123}
124
125int dw_mci_pltfm_remove(struct platform_device *pdev)
126{
127 struct dw_mci *host = platform_get_drvdata(pdev);
128
129 dw_mci_remove(host);
130 return 0;
131}
132EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
133
134static struct platform_driver dw_mci_pltfm_driver = {
135 .probe = dw_mci_pltfm_probe,
136 .remove = dw_mci_pltfm_remove,
137 .driver = {
138 .name = "dw_mmc",
139 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
140 .of_match_table = dw_mci_pltfm_match,
141 .pm = &dw_mci_pltfm_pmops,
142 },
143};
144
145module_platform_driver(dw_mci_pltfm_driver);
146
147MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
148MODULE_AUTHOR("NXP Semiconductor VietNam");
149MODULE_AUTHOR("Imagination Technologies Ltd");
150MODULE_LICENSE("GPL v2");
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/err.h>
14#include <linux/interrupt.h>
15#include <linux/module.h>
16#include <linux/io.h>
17#include <linux/irq.h>
18#include <linux/platform_device.h>
19#include <linux/slab.h>
20#include <linux/mmc/host.h>
21#include <linux/mmc/mmc.h>
22#include <linux/mmc/dw_mmc.h>
23#include <linux/of.h>
24#include <linux/clk.h>
25
26#include "dw_mmc.h"
27#include "dw_mmc-pltfm.h"
28
29int dw_mci_pltfm_register(struct platform_device *pdev,
30 const struct dw_mci_drv_data *drv_data)
31{
32 struct dw_mci *host;
33 struct resource *regs;
34
35 host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
36 if (!host)
37 return -ENOMEM;
38
39 host->irq = platform_get_irq(pdev, 0);
40 if (host->irq < 0)
41 return host->irq;
42
43 host->drv_data = drv_data;
44 host->dev = &pdev->dev;
45 host->irq_flags = 0;
46 host->pdata = pdev->dev.platform_data;
47
48 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
49 /* Get registers' physical base address */
50 host->phy_regs = regs->start;
51 host->regs = devm_ioremap_resource(&pdev->dev, regs);
52 if (IS_ERR(host->regs))
53 return PTR_ERR(host->regs);
54
55 platform_set_drvdata(pdev, host);
56 return dw_mci_probe(host);
57}
58EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
59
60#ifdef CONFIG_PM_SLEEP
61/*
62 * TODO: we should probably disable the clock to the card in the suspend path.
63 */
64static int dw_mci_pltfm_suspend(struct device *dev)
65{
66 struct dw_mci *host = dev_get_drvdata(dev);
67
68 return dw_mci_suspend(host);
69}
70
71static int dw_mci_pltfm_resume(struct device *dev)
72{
73 struct dw_mci *host = dev_get_drvdata(dev);
74
75 return dw_mci_resume(host);
76}
77#endif /* CONFIG_PM_SLEEP */
78
79SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
80EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
81
82static const struct of_device_id dw_mci_pltfm_match[] = {
83 { .compatible = "snps,dw-mshc", },
84 { .compatible = "altr,socfpga-dw-mshc", },
85 { .compatible = "img,pistachio-dw-mshc", },
86 {},
87};
88MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
89
90static int dw_mci_pltfm_probe(struct platform_device *pdev)
91{
92 const struct dw_mci_drv_data *drv_data = NULL;
93 const struct of_device_id *match;
94
95 if (pdev->dev.of_node) {
96 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
97 drv_data = match->data;
98 }
99
100 return dw_mci_pltfm_register(pdev, drv_data);
101}
102
103int dw_mci_pltfm_remove(struct platform_device *pdev)
104{
105 struct dw_mci *host = platform_get_drvdata(pdev);
106
107 dw_mci_remove(host);
108 return 0;
109}
110EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
111
112static struct platform_driver dw_mci_pltfm_driver = {
113 .probe = dw_mci_pltfm_probe,
114 .remove = dw_mci_pltfm_remove,
115 .driver = {
116 .name = "dw_mmc",
117 .of_match_table = dw_mci_pltfm_match,
118 .pm = &dw_mci_pltfm_pmops,
119 },
120};
121
122module_platform_driver(dw_mci_pltfm_driver);
123
124MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
125MODULE_AUTHOR("NXP Semiconductor VietNam");
126MODULE_AUTHOR("Imagination Technologies Ltd");
127MODULE_LICENSE("GPL v2");