cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

pinctrl-scu.c (3146B)

      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
     18enum pad_func_e {
     19	IMX_SC_PAD_FUNC_SET = 15,
     20	IMX_SC_PAD_FUNC_GET = 16,
     21};
     22
     23struct imx_sc_msg_req_pad_set {
     24	struct imx_sc_rpc_msg hdr;
     25	u32 val;
     26	u16 pad;
     27} __packed __aligned(4);
     28
     29struct imx_sc_msg_req_pad_get {
     30	struct imx_sc_rpc_msg hdr;
     31	u16 pad;
     32} __packed __aligned(4);
     33
     34struct imx_sc_msg_resp_pad_get {
     35	struct imx_sc_rpc_msg hdr;
     36	u32 val;
     37} __packed;
     38
     39static struct imx_sc_ipc *pinctrl_ipc_handle;
     40
     41int imx_pinctrl_sc_ipc_init(struct platform_device *pdev)
     42{
     43	return imx_scu_get_handle(&pinctrl_ipc_handle);
     44}
     45EXPORT_SYMBOL_GPL(imx_pinctrl_sc_ipc_init);
     46
     47int 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}
     71EXPORT_SYMBOL_GPL(imx_pinconf_get_scu);
     72
     73int 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}
    107EXPORT_SYMBOL_GPL(imx_pinconf_set_scu);
    108
    109void 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}
    126EXPORT_SYMBOL_GPL(imx_pinctrl_parse_pin_scu);
    127
    128MODULE_AUTHOR("Dong Aisheng <aisheng.dong@nxp.com>");
    129MODULE_DESCRIPTION("NXP i.MX SCU common pinctrl driver");
    130MODULE_LICENSE("GPL v2");