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12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/platform_device.h>
15#include <linux/of.h>
16#include <linux/time.h>
17
18#include "ufshcd-pltfrm.h"
19
20#define CDNS_UFS_REG_HCLKDIV 0xFC
21#define CDNS_UFS_REG_PHY_XCFGD1 0x113C
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28
29static int cdns_ufs_set_hclkdiv(struct ufs_hba *hba)
30{
31 struct ufs_clk_info *clki;
32 struct list_head *head = &hba->clk_list_head;
33 unsigned long core_clk_rate = 0;
34 u32 core_clk_div = 0;
35
36 if (list_empty(head))
37 return 0;
38
39 list_for_each_entry(clki, head, list) {
40 if (IS_ERR_OR_NULL(clki->clk))
41 continue;
42 if (!strcmp(clki->name, "core_clk"))
43 core_clk_rate = clk_get_rate(clki->clk);
44 }
45
46 if (!core_clk_rate) {
47 dev_err(hba->dev, "%s: unable to find core_clk rate\n",
48 __func__);
49 return -EINVAL;
50 }
51
52 core_clk_div = core_clk_rate / USEC_PER_SEC;
53
54 ufshcd_writel(hba, core_clk_div, CDNS_UFS_REG_HCLKDIV);
55
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57
58
59 mb();
60
61 return 0;
62}
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71
72static int cdns_ufs_setup_clocks(struct ufs_hba *hba, bool on,
73 enum ufs_notify_change_status status)
74{
75 if ((!on) || (status == PRE_CHANGE))
76 return 0;
77
78 return cdns_ufs_set_hclkdiv(hba);
79}
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85
86
87static int cdns_ufs_init(struct ufs_hba *hba)
88{
89 int status = 0;
90
91 if (hba->vops && hba->vops->phy_initialization)
92 status = hba->vops->phy_initialization(hba);
93
94 return status;
95}
96
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101
102
103static int cdns_ufs_m31_16nm_phy_initialization(struct ufs_hba *hba)
104{
105 u32 data;
106
107
108 data = ufshcd_readl(hba, CDNS_UFS_REG_PHY_XCFGD1);
109 data |= BIT(24);
110 ufshcd_writel(hba, data, CDNS_UFS_REG_PHY_XCFGD1);
111
112 return 0;
113}
114
115static const struct ufs_hba_variant_ops cdns_ufs_pltfm_hba_vops = {
116 .name = "cdns-ufs-pltfm",
117 .setup_clocks = cdns_ufs_setup_clocks,
118};
119
120static const struct ufs_hba_variant_ops cdns_ufs_m31_16nm_pltfm_hba_vops = {
121 .name = "cdns-ufs-pltfm",
122 .init = cdns_ufs_init,
123 .setup_clocks = cdns_ufs_setup_clocks,
124 .phy_initialization = cdns_ufs_m31_16nm_phy_initialization,
125};
126
127static const struct of_device_id cdns_ufs_of_match[] = {
128 {
129 .compatible = "cdns,ufshc",
130 .data = &cdns_ufs_pltfm_hba_vops,
131 },
132 {
133 .compatible = "cdns,ufshc-m31-16nm",
134 .data = &cdns_ufs_m31_16nm_pltfm_hba_vops,
135 },
136 { },
137};
138
139MODULE_DEVICE_TABLE(of, cdns_ufs_of_match);
140
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146
147static int cdns_ufs_pltfrm_probe(struct platform_device *pdev)
148{
149 int err;
150 const struct of_device_id *of_id;
151 struct ufs_hba_variant_ops *vops;
152 struct device *dev = &pdev->dev;
153
154 of_id = of_match_node(cdns_ufs_of_match, dev->of_node);
155 vops = (struct ufs_hba_variant_ops *)of_id->data;
156
157
158 err = ufshcd_pltfrm_init(pdev, vops);
159 if (err)
160 dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);
161
162 return err;
163}
164
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170
171static int cdns_ufs_pltfrm_remove(struct platform_device *pdev)
172{
173 struct ufs_hba *hba = platform_get_drvdata(pdev);
174
175 ufshcd_remove(hba);
176 return 0;
177}
178
179static const struct dev_pm_ops cdns_ufs_dev_pm_ops = {
180 .suspend = ufshcd_pltfrm_suspend,
181 .resume = ufshcd_pltfrm_resume,
182 .runtime_suspend = ufshcd_pltfrm_runtime_suspend,
183 .runtime_resume = ufshcd_pltfrm_runtime_resume,
184 .runtime_idle = ufshcd_pltfrm_runtime_idle,
185};
186
187static struct platform_driver cdns_ufs_pltfrm_driver = {
188 .probe = cdns_ufs_pltfrm_probe,
189 .remove = cdns_ufs_pltfrm_remove,
190 .driver = {
191 .name = "cdns-ufshcd",
192 .pm = &cdns_ufs_dev_pm_ops,
193 .of_match_table = cdns_ufs_of_match,
194 },
195};
196
197module_platform_driver(cdns_ufs_pltfrm_driver);
198
199MODULE_AUTHOR("Jan Kotas <jank@cadence.com>");
200MODULE_DESCRIPTION("Cadence UFS host controller platform driver");
201MODULE_LICENSE("GPL v2");
202MODULE_VERSION(UFSHCD_DRIVER_VERSION);
203