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