1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2016 Freescale Semiconductor, Inc.
4 * Copyright 2017-2018 NXP
5 * Dong Aisheng <aisheng.dong@nxp.com>
6 */
7
8 #include <linux/err.h>
9 #include <linux/firmware/imx/sci.h>
10 #include <linux/module.h>
11 #include <linux/of_address.h>
12 #include <linux/pinctrl/pinctrl.h>
13 #include <linux/platform_device.h>
14
15 #include "../core.h"
16 #include "pinctrl-imx.h"
17
18 enum pad_func_e {
19 IMX_SC_PAD_FUNC_SET = 15,
20 IMX_SC_PAD_FUNC_GET = 16,
21 };
22
23 struct imx_sc_msg_req_pad_set {
24 struct imx_sc_rpc_msg hdr;
25 u32 val;
26 u16 pad;
27 } __packed __aligned(4);
28
29 struct imx_sc_msg_req_pad_get {
30 struct imx_sc_rpc_msg hdr;
31 u16 pad;
32 } __packed __aligned(4);
33
34 struct imx_sc_msg_resp_pad_get {
35 struct imx_sc_rpc_msg hdr;
36 u32 val;
37 } __packed;
38
39 static struct imx_sc_ipc *pinctrl_ipc_handle;
40
imx_pinctrl_sc_ipc_init(struct platform_device * pdev)41 int imx_pinctrl_sc_ipc_init(struct platform_device *pdev)
42 {
43 return imx_scu_get_handle(&pinctrl_ipc_handle);
44 }
45 EXPORT_SYMBOL_GPL(imx_pinctrl_sc_ipc_init);
46
imx_pinconf_get_scu(struct pinctrl_dev * pctldev,unsigned pin_id,unsigned long * config)47 int imx_pinconf_get_scu(struct pinctrl_dev *pctldev, unsigned pin_id,
48 unsigned long *config)
49 {
50 struct imx_sc_msg_req_pad_get msg;
51 struct imx_sc_msg_resp_pad_get *resp;
52 struct imx_sc_rpc_msg *hdr = &msg.hdr;
53 int ret;
54
55 hdr->ver = IMX_SC_RPC_VERSION;
56 hdr->svc = IMX_SC_RPC_SVC_PAD;
57 hdr->func = IMX_SC_PAD_FUNC_GET;
58 hdr->size = 2;
59
60 msg.pad = pin_id;
61
62 ret = imx_scu_call_rpc(pinctrl_ipc_handle, &msg, true);
63 if (ret)
64 return ret;
65
66 resp = (struct imx_sc_msg_resp_pad_get *)&msg;
67 *config = resp->val;
68
69 return 0;
70 }
71 EXPORT_SYMBOL_GPL(imx_pinconf_get_scu);
72
imx_pinconf_set_scu(struct pinctrl_dev * pctldev,unsigned pin_id,unsigned long * configs,unsigned num_configs)73 int imx_pinconf_set_scu(struct pinctrl_dev *pctldev, unsigned pin_id,
74 unsigned long *configs, unsigned num_configs)
75 {
76 struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
77 struct imx_sc_msg_req_pad_set msg;
78 struct imx_sc_rpc_msg *hdr = &msg.hdr;
79 unsigned int mux = configs[0];
80 unsigned int conf = configs[1];
81 unsigned int val;
82 int ret;
83
84 /*
85 * Set mux and conf together in one IPC call
86 */
87 WARN_ON(num_configs != 2);
88
89 val = conf | BM_PAD_CTL_IFMUX_ENABLE | BM_PAD_CTL_GP_ENABLE;
90 val |= mux << BP_PAD_CTL_IFMUX;
91
92 hdr->ver = IMX_SC_RPC_VERSION;
93 hdr->svc = IMX_SC_RPC_SVC_PAD;
94 hdr->func = IMX_SC_PAD_FUNC_SET;
95 hdr->size = 3;
96
97 msg.pad = pin_id;
98 msg.val = val;
99
100 ret = imx_scu_call_rpc(pinctrl_ipc_handle, &msg, true);
101
102 dev_dbg(ipctl->dev, "write: pin_id %u config 0x%x val 0x%x\n",
103 pin_id, conf, val);
104
105 return ret;
106 }
107 EXPORT_SYMBOL_GPL(imx_pinconf_set_scu);
108
imx_pinctrl_parse_pin_scu(struct imx_pinctrl * ipctl,unsigned int * pin_id,struct imx_pin * pin,const __be32 ** list_p)109 void imx_pinctrl_parse_pin_scu(struct imx_pinctrl *ipctl,
110 unsigned int *pin_id, struct imx_pin *pin,
111 const __be32 **list_p)
112 {
113 const struct imx_pinctrl_soc_info *info = ipctl->info;
114 struct imx_pin_scu *pin_scu = &pin->conf.scu;
115 const __be32 *list = *list_p;
116
117 pin->pin = be32_to_cpu(*list++);
118 *pin_id = pin->pin;
119 pin_scu->mux_mode = be32_to_cpu(*list++);
120 pin_scu->config = be32_to_cpu(*list++);
121 *list_p = list;
122
123 dev_dbg(ipctl->dev, "%s: 0x%x 0x%08lx", info->pins[pin->pin].name,
124 pin_scu->mux_mode, pin_scu->config);
125 }
126 EXPORT_SYMBOL_GPL(imx_pinctrl_parse_pin_scu);
127
128 MODULE_AUTHOR("Dong Aisheng <aisheng.dong@nxp.com>");
129 MODULE_DESCRIPTION("NXP i.MX SCU common pinctrl driver");
130 MODULE_LICENSE("GPL v2");
131