1 // SPDX-License-Identifier: GPL-2.0
3  * Platform UFS Host driver for Cadence controller
19 #include "ufshcd-pltfrm.h"
27 	 * cdns_ufs_dme_attr_val - for storing L4 attributes
33  * cdns_ufs_get_l4_attr - get L4 attributes on local side
39 	struct cdns_ufs_host *host = ufshcd_get_variant(hba);  in cdns_ufs_get_l4_attr()  local
42 		       &host->cdns_ufs_dme_attr_val[0]);  in cdns_ufs_get_l4_attr()
44 		       &host->cdns_ufs_dme_attr_val[1]);  in cdns_ufs_get_l4_attr()
46 		       &host->cdns_ufs_dme_attr_val[2]);  in cdns_ufs_get_l4_attr()
48 		       &host->cdns_ufs_dme_attr_val[3]);  in cdns_ufs_get_l4_attr()
50 		       &host->cdns_ufs_dme_attr_val[4]);  in cdns_ufs_get_l4_attr()
52 		       &host->cdns_ufs_dme_attr_val[5]);  in cdns_ufs_get_l4_attr()
54 		       &host->cdns_ufs_dme_attr_val[6]);  in cdns_ufs_get_l4_attr()
56 		       &host->cdns_ufs_dme_attr_val[7]);  in cdns_ufs_get_l4_attr()
58 		       &host->cdns_ufs_dme_attr_val[8]);  in cdns_ufs_get_l4_attr()
60 		       &host->cdns_ufs_dme_attr_val[9]);  in cdns_ufs_get_l4_attr()
62 		       &host->cdns_ufs_dme_attr_val[10]);  in cdns_ufs_get_l4_attr()
64 		       &host->cdns_ufs_dme_attr_val[11]);  in cdns_ufs_get_l4_attr()
68  * cdns_ufs_set_l4_attr - set L4 attributes on local side
74 	struct cdns_ufs_host *host = ufshcd_get_variant(hba);  in cdns_ufs_set_l4_attr()  local
78 		       host->cdns_ufs_dme_attr_val[0]);  in cdns_ufs_set_l4_attr()
80 		       host->cdns_ufs_dme_attr_val[1]);  in cdns_ufs_set_l4_attr()
82 		       host->cdns_ufs_dme_attr_val[2]);  in cdns_ufs_set_l4_attr()
84 		       host->cdns_ufs_dme_attr_val[3]);  in cdns_ufs_set_l4_attr()
86 		       host->cdns_ufs_dme_attr_val[4]);  in cdns_ufs_set_l4_attr()
88 		       host->cdns_ufs_dme_attr_val[5]);  in cdns_ufs_set_l4_attr()
90 		       host->cdns_ufs_dme_attr_val[6]);  in cdns_ufs_set_l4_attr()
92 		       host->cdns_ufs_dme_attr_val[7]);  in cdns_ufs_set_l4_attr()
94 		       host->cdns_ufs_dme_attr_val[8]);  in cdns_ufs_set_l4_attr()
96 		       host->cdns_ufs_dme_attr_val[9]);  in cdns_ufs_set_l4_attr()
98 		       host->cdns_ufs_dme_attr_val[10]);  in cdns_ufs_set_l4_attr()
100 		       host->cdns_ufs_dme_attr_val[11]);  in cdns_ufs_set_l4_attr()
106  * @hba: host controller instance
108  * Return zero for success and non-zero for failure
113 	struct list_head *head = &hba->clk_list_head;  in cdns_ufs_set_hclkdiv()
121 		if (IS_ERR_OR_NULL(clki->clk))  in cdns_ufs_set_hclkdiv()
123 		if (!strcmp(clki->name, "core_clk"))  in cdns_ufs_set_hclkdiv()
124 			core_clk_rate = clk_get_rate(clki->clk);  in cdns_ufs_set_hclkdiv()
128 		dev_err(hba->dev, "%s: unable to find core_clk rate\n",  in cdns_ufs_set_hclkdiv()
130 		return -EINVAL;  in cdns_ufs_set_hclkdiv()
148  * @hba: host controller instance
151  * Return zero for success and non-zero for failure
165  * @hba: host controller instance
182  * @hba: host controller instance
185  * Return zero for success and non-zero for failure
196 	 * before link startup which will make sure that both host  in cdns_ufs_link_startup_notify()
206 	hba->ahit = 0;  in cdns_ufs_link_startup_notify()
212  * cdns_ufs_init - performs additional ufs initialization
213  * @hba: host controller instance
220 	struct cdns_ufs_host *host;  in cdns_ufs_init()  local
221 	struct device *dev = hba->dev;  in cdns_ufs_init()
223 	host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);  in cdns_ufs_init()
225 	if (!host)  in cdns_ufs_init()
226 		return -ENOMEM;  in cdns_ufs_init()
227 	ufshcd_set_variant(hba, host);  in cdns_ufs_init()
235  * cdns_ufs_m31_16nm_phy_initialization - performs m31 phy initialization
236  * @hba: host controller instance
253 	.name = "cdns-ufs-pltfm",
261 	.name = "cdns-ufs-pltfm",
275 		.compatible = "cdns,ufshc-m31-16nm",
284  * cdns_ufs_pltfrm_probe - probe routine of the driver
287  * Return zero for success and non-zero for failure
294 	struct device *dev = &pdev->dev;  in cdns_ufs_pltfrm_probe()
296 	of_id = of_match_node(cdns_ufs_of_match, dev->of_node);  in cdns_ufs_pltfrm_probe()
297 	vops = (struct ufs_hba_variant_ops *)of_id->data;  in cdns_ufs_pltfrm_probe()
308  * cdns_ufs_pltfrm_remove - removes the ufs driver
333 		.name   = "cdns-ufshcd",
342 MODULE_DESCRIPTION("Cadence UFS host controller platform driver");