// SPDX-License-Identifier: GPL-2.0
/*
* Xilinx Zynq MPSoC Firmware layer
*
* Copyright (C) 2014-2022 Xilinx, Inc.
* Copyright (C) 2022 - 2023, Advanced Micro Devices, Inc.
*
* Michal Simek <[email protected]>
* Davorin Mista <[email protected]>
* Jolly Shah <[email protected]>
* Rajan Vaja <[email protected]>
*/
#include <linux/arm-smccc.h>
#include <linux/compiler.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/hashtable.h>
#include <linux/firmware/xlnx-zynqmp.h>
#include <linux/firmware/xlnx-event-manager.h>
#include "zynqmp-debug.h"
/* Max HashMap Order for PM API feature check (1<<7 = 128) */
#define PM_API_FEATURE_CHECK_MAX_ORDER 7
/* CRL registers and bitfields */
#define CRL_APB_BASE 0xFF5E0000U
/* BOOT_PIN_CTRL- Used to control the mode pins after boot */
#define CRL_APB_BOOT_PIN_CTRL (CRL_APB_BASE + (0x250U))
/* BOOT_PIN_CTRL_MASK- out_val[11:8], out_en[3:0] */
#define CRL_APB_BOOTPIN_CTRL_MASK 0xF0FU
/* IOCTL/QUERY feature payload size */
#define FEATURE_PAYLOAD_SIZE 2
static bool feature_check_enabled;
static DEFINE_HASHTABLE(pm_api_features_map, PM_API_FEATURE_CHECK_MAX_ORDER);
static u32 ioctl_features[FEATURE_PAYLOAD_SIZE];
static u32 query_features[FEATURE_PAYLOAD_SIZE];
static struct platform_device *em_dev;
/**
* struct zynqmp_devinfo - Structure for Zynqmp device instance
* @dev: Device Pointer
* @feature_conf_id: Feature conf id
*/
struct zynqmp_devinfo {
struct device *dev;
u32 feature_conf_id;
};
/**
* struct pm_api_feature_data - PM API Feature data
* @pm_api_id: PM API Id, used as key to index into hashmap
* @feature_status: status of PM API feature: valid, invalid
* @hentry: hlist_node that hooks this entry into hashtable
*/
struct pm_api_feature_data {
u32 pm_api_id;
int feature_status;
struct hlist_node hentry;
};
static const struct mfd_cell firmware_devs[] = {
{
.name = "zynqmp_power_controller",
},
};
/**
* zynqmp_pm_ret_code() - Convert PMU-FW error codes to Linux error codes
* @ret_status: PMUFW return code
*
* Return: corresponding Linux error code
*/
static int zynqmp_pm_ret_code(u32 ret_status)
{
switch (ret_status) {
case XST_PM_SUCCESS:
case XST_PM_DOUBLE_REQ:
return 0;
case XST_PM_NO_FEATURE:
return -ENOTSUPP;
case XST_PM_INVALID_VERSION:
return -EOPNOTSUPP;
case XST_PM_NO_ACCESS:
return -EACCES;
case XST_PM_ABORT_SUSPEND:
return -ECANCELED;
case XST_PM_MULT_USER:
return -EUSERS;
case XST_PM_INTERNAL:
case XST_PM_CONFLICT:
case XST_PM_INVALID_NODE:
case XST_PM_INVALID_CRC:
default:
return -EINVAL;
}
}
static noinline int do_fw_call_fail(u32 *ret_payload, u32 num_args, ...)
{
return -ENODEV;
}
/*
* PM function call wrapper
* Invoke do_fw_call_smc or do_fw_call_hvc, depending on the configuration
*/
static int (*do_fw_call)(u32 *ret_payload, u32, ...) = do_fw_call_fail;
/**
* do_fw_call_smc() - Call system-level platform management layer (SMC)
* @num_args: Number of variable arguments should be <= 8
* @ret_payload: Returned value array
*
* Invoke platform management function via SMC call (no hypervisor present).
*
* Return: Returns status, either success or error+reason
*/
static noinline int do_fw_call_smc(u32 *ret_payload, u32 num_args, ...)
{
struct arm_smccc_res res;
u64 args[8] = {0};
va_list arg_list;
u8 i;
if (num_args > 8)
return -EINVAL;
va_start(arg_list, num_args);
for (i = 0; i < num_args; i++)
args[i] = va_arg(arg_list, u64);
va_end(arg_list);
arm_smccc_smc(args[0], args[1], args[2], args[3], args[4], args[5], args[6], args[7], &res);
if (ret_payload) {
ret_payload[0] = lower_32_bits(res.a0);
ret_payload[1] = upper_32_bits(res.a0);
ret_payload[2] = lower_32_bits(res.a1);
ret_payload[3] = upper_32_bits(res.a1);
}
return zynqmp_pm_ret_code((enum pm_ret_status)res.a0);
}
/**
* do_fw_call_hvc() - Call system-level platform management layer (HVC)
* @num_args: Number of variable arguments should be <= 8
* @ret_payload: Returned value array
*
* Invoke platform management function via HVC
* HVC-based for communication through hypervisor
* (no direct communication with ATF).
*
* Return: Returns status, either success or error+reason
*/
static noinline int do_fw_call_hvc(u32 *ret_payload, u32 num_args, ...)
{
struct arm_smccc_res res;
u64 args[8] = {0};
va_list arg_list;
u8 i;
if (num_args > 8)
return -EINVAL;
va_start(arg_list, num_args);
for (i = 0; i < num_args; i++)
args[i] = va_arg(arg_list, u64);
va_end(arg_list);
arm_smccc_hvc(args[0], args[1], args[2], args[3], args[4], args[5], args[6], args[7], &res);
if (ret_payload) {
ret_payload[0] = lower_32_bits(res.a0);
ret_payload[1] = upper_32_bits(res.a0);
ret_payload[2] = lower_32_bits(res.a1);
ret_payload[3] = upper_32_bits(res.a1);
}
return zynqmp_pm_ret_code((enum pm_ret_status)res.a0);
}
static int __do_feature_check_call(const u32 api_id, u32 *ret_payload)
{
int ret;
u64 smc_arg[2];
u32 module_id;
u32 feature_check_api_id;
module_id = FIELD_GET(MODULE_ID_MASK, api_id);
/*
* Feature check of APIs belonging to PM, XSEM, and TF-A are handled by calling
* PM_FEATURE_CHECK API. For other modules, call PM_API_FEATURES API.
*/
if (module_id == PM_MODULE_ID || module_id == XSEM_MODULE_ID || module_id == TF_A_MODULE_ID)
feature_check_api_id = PM_FEATURE_CHECK;
else
feature_check_api_id = PM_API_FEATURES;
/*
* Feature check of TF-A APIs is done in the TF-A layer and it expects for
* MODULE_ID_MASK bits of SMC's arg[0] to be the same as PM_MODULE_ID.
*/
if (module_id == TF_A_MODULE_ID)
module_id = PM_MODULE_ID;
smc_arg[0] = PM_SIP_SVC | FIELD_PREP(MODULE_ID_MASK, module_id) | feature_check_api_id;
smc_arg[1] = (api_id & API_ID_MASK);
ret = do_fw_call(ret_payload, 2, smc_arg[0], smc_arg[1]);
if (ret)
ret = -EOPNOTSUPP;
else
ret = ret_payload[1];
return ret;
}
static int do_feature_check_call(const u32 api_id)
{
int ret;
u32 ret_payload[PAYLOAD_ARG_CNT];
struct pm_api_feature_data *feature_data;
/* Check for existing entry in hash table for given api */
hash_for_each_possible(pm_api_features_map, feature_data, hentry,
api_id) {
if (feature_data->pm_api_id == api_id)
return feature_data->feature_status;
}
/* Add new entry if not present */
feature_data = kmalloc(sizeof(*feature_data), GFP_ATOMIC);
if (!feature_data)
return -ENOMEM;
feature_data->pm_api_id = api_id;
ret = __do_feature_check_call(api_id, ret_payload);
feature_data->feature_status = ret;
hash_add(pm_api_features_map, &feature_data->hentry, api_id);
if (api_id == PM_IOCTL)
/* Store supported IOCTL IDs mask */
memcpy(ioctl_features, &ret_payload[2], FEATURE_PAYLOAD_SIZE * 4);
else if (api_id == PM_QUERY_DATA)
/* Store supported QUERY IDs mask */
memcpy(query_features, &ret_payload[2], FEATURE_PAYLOAD_SIZE * 4);
return ret;
}
/**
* zynqmp_pm_feature() - Check whether given feature is supported or not and
* store supported IOCTL/QUERY ID mask
* @api_id: API ID to check
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_feature(const u32 api_id)
{
int ret;
if (!feature_check_enabled)
return 0;
ret = do_feature_check_call(api_id);
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_feature);
/**
* zynqmp_pm_is_function_supported() - Check whether given IOCTL/QUERY function
* is supported or not
* @api_id: PM_IOCTL or PM_QUERY_DATA
* @id: IOCTL or QUERY function IDs
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_is_function_supported(const u32 api_id, const u32 id)
{
int ret;
u32 *bit_mask;
/* Input arguments validation */
if (id >= 64 || (api_id != PM_IOCTL && api_id != PM_QUERY_DATA))
return -EINVAL;
/* Check feature check API version */
ret = do_feature_check_call(PM_FEATURE_CHECK);
if (ret < 0)
return ret;
/* Check if feature check version 2 is supported or not */
if ((ret & FIRMWARE_VERSION_MASK) == PM_API_VERSION_2) {
/*
* Call feature check for IOCTL/QUERY API to get IOCTL ID or
* QUERY ID feature status.
*/
ret = do_feature_check_call(api_id);
if (ret < 0)
return ret;
bit_mask = (api_id == PM_IOCTL) ? ioctl_features : query_features;
if ((bit_mask[(id / 32)] & BIT((id % 32))) == 0U)
return -EOPNOTSUPP;
} else {
return -ENODATA;
}
return 0;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_is_function_supported);
/**
* zynqmp_pm_invoke_fn() - Invoke the system-level platform management layer
* caller function depending on the configuration
* @pm_api_id: Requested PM-API call
* @ret_payload: Returned value array
* @num_args: Number of arguments to requested PM-API call
*
* Invoke platform management function for SMC or HVC call, depending on
* configuration.
* Following SMC Calling Convention (SMCCC) for SMC64:
* Pm Function Identifier,
* PM_SIP_SVC + PM_API_ID =
* ((SMC_TYPE_FAST << FUNCID_TYPE_SHIFT)
* ((SMC_64) << FUNCID_CC_SHIFT)
* ((SIP_START) << FUNCID_OEN_SHIFT)
* ((PM_API_ID) & FUNCID_NUM_MASK))
*
* PM_SIP_SVC - Registered ZynqMP SIP Service Call.
* PM_API_ID - Platform Management API ID.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_invoke_fn(u32 pm_api_id, u32 *ret_payload, u32 num_args, ...)
{
/*
* Added SIP service call Function Identifier
* Make sure to stay in x0 register
*/
u64 smc_arg[8];
int ret, i;
va_list arg_list;
u32 args[14] = {0};
if (num_args > 14)
return -EINVAL;
va_start(arg_list, num_args);
/* Check if feature is supported or not */
ret = zynqmp_pm_feature(pm_api_id);
if (ret < 0)
return ret;
for (i = 0; i < num_args; i++)
args[i] = va_arg(arg_list, u32);
va_end(arg_list);
smc_arg[0] = PM_SIP_SVC | pm_api_id;
for (i = 0; i < 7; i++)
smc_arg[i + 1] = ((u64)args[(i * 2) + 1] << 32) | args[i * 2];
return do_fw_call(ret_payload, 8, smc_arg[0], smc_arg[1], smc_arg[2], smc_arg[3],
smc_arg[4], smc_arg[5], smc_arg[6], smc_arg[7]);
}
static u32 pm_api_version;
static u32 pm_tz_version;
static u32 pm_family_code;
static u32 pm_sub_family_code;
int zynqmp_pm_register_sgi(u32 sgi_num, u32 reset)
{
int ret;
ret = zynqmp_pm_invoke_fn(TF_A_PM_REGISTER_SGI, NULL, 2, sgi_num, reset);
if (ret != -EOPNOTSUPP && !ret)
return ret;
/* try old implementation as fallback strategy if above fails */
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 3, IOCTL_REGISTER_SGI, sgi_num, reset);
}
/**
* zynqmp_pm_get_api_version() - Get version number of PMU PM firmware
* @version: Returned version value
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_get_api_version(u32 *version)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!version)
return -EINVAL;
/* Check is PM API version already verified */
if (pm_api_version > 0) {
*version = pm_api_version;
return 0;
}
ret = zynqmp_pm_invoke_fn(PM_GET_API_VERSION, ret_payload, 0);
*version = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_get_api_version);
/**
* zynqmp_pm_get_chipid - Get silicon ID registers
* @idcode: IDCODE register
* @version: version register
*
* Return: Returns the status of the operation and the idcode and version
* registers in @idcode and @version.
*/
int zynqmp_pm_get_chipid(u32 *idcode, u32 *version)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!idcode || !version)
return -EINVAL;
ret = zynqmp_pm_invoke_fn(PM_GET_CHIPID, ret_payload, 0);
*idcode = ret_payload[1];
*version = ret_payload[2];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_get_chipid);
/**
* zynqmp_pm_get_family_info() - Get family info of platform
* @family: Returned family code value
* @subfamily: Returned sub-family code value
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_get_family_info(u32 *family, u32 *subfamily)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
u32 idcode;
int ret;
/* Check is family or sub-family code already received */
if (pm_family_code && pm_sub_family_code) {
*family = pm_family_code;
*subfamily = pm_sub_family_code;
return 0;
}
ret = zynqmp_pm_invoke_fn(PM_GET_CHIPID, ret_payload, 0);
if (ret < 0)
return ret;
idcode = ret_payload[1];
pm_family_code = FIELD_GET(FAMILY_CODE_MASK, idcode);
pm_sub_family_code = FIELD_GET(SUB_FAMILY_CODE_MASK, idcode);
*family = pm_family_code;
*subfamily = pm_sub_family_code;
return 0;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_get_family_info);
/**
* zynqmp_pm_get_trustzone_version() - Get secure trustzone firmware version
* @version: Returned version value
*
* Return: Returns status, either success or error+reason
*/
static int zynqmp_pm_get_trustzone_version(u32 *version)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!version)
return -EINVAL;
/* Check is PM trustzone version already verified */
if (pm_tz_version > 0) {
*version = pm_tz_version;
return 0;
}
ret = zynqmp_pm_invoke_fn(PM_GET_TRUSTZONE_VERSION, ret_payload, 0);
*version = ret_payload[1];
return ret;
}
/**
* get_set_conduit_method() - Choose SMC or HVC based communication
* @np: Pointer to the device_node structure
*
* Use SMC or HVC-based functions to communicate with EL2/EL3.
*
* Return: Returns 0 on success or error code
*/
static int get_set_conduit_method(struct device_node *np)
{
const char *method;
if (of_property_read_string(np, "method", &method)) {
pr_warn("%s missing \"method\" property\n", __func__);
return -ENXIO;
}
if (!strcmp("hvc", method)) {
do_fw_call = do_fw_call_hvc;
} else if (!strcmp("smc", method)) {
do_fw_call = do_fw_call_smc;
} else {
pr_warn("%s Invalid \"method\" property: %s\n",
__func__, method);
return -EINVAL;
}
return 0;
}
/**
* zynqmp_pm_query_data() - Get query data from firmware
* @qdata: Variable to the zynqmp_pm_query_data structure
* @out: Returned output value
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_query_data(struct zynqmp_pm_query_data qdata, u32 *out)
{
int ret;
ret = zynqmp_pm_invoke_fn(PM_QUERY_DATA, out, 4, qdata.qid, qdata.arg1, qdata.arg2,
qdata.arg3);
/*
* For clock name query, all bytes in SMC response are clock name
* characters and return code is always success. For invalid clocks,
* clock name bytes would be zeros.
*/
return qdata.qid == PM_QID_CLOCK_GET_NAME ? 0 : ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_query_data);
/**
* zynqmp_pm_clock_enable() - Enable the clock for given id
* @clock_id: ID of the clock to be enabled
*
* This function is used by master to enable the clock
* including peripherals and PLL clocks.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_clock_enable(u32 clock_id)
{
return zynqmp_pm_invoke_fn(PM_CLOCK_ENABLE, NULL, 1, clock_id);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_clock_enable);
/**
* zynqmp_pm_clock_disable() - Disable the clock for given id
* @clock_id: ID of the clock to be disable
*
* This function is used by master to disable the clock
* including peripherals and PLL clocks.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_clock_disable(u32 clock_id)
{
return zynqmp_pm_invoke_fn(PM_CLOCK_DISABLE, NULL, 1, clock_id);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_clock_disable);
/**
* zynqmp_pm_clock_getstate() - Get the clock state for given id
* @clock_id: ID of the clock to be queried
* @state: 1/0 (Enabled/Disabled)
*
* This function is used by master to get the state of clock
* including peripherals and PLL clocks.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_clock_getstate(u32 clock_id, u32 *state)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
ret = zynqmp_pm_invoke_fn(PM_CLOCK_GETSTATE, ret_payload, 1, clock_id);
*state = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_clock_getstate);
/**
* zynqmp_pm_clock_setdivider() - Set the clock divider for given id
* @clock_id: ID of the clock
* @divider: divider value
*
* This function is used by master to set divider for any clock
* to achieve desired rate.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_clock_setdivider(u32 clock_id, u32 divider)
{
return zynqmp_pm_invoke_fn(PM_CLOCK_SETDIVIDER, NULL, 2, clock_id, divider);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_clock_setdivider);
/**
* zynqmp_pm_clock_getdivider() - Get the clock divider for given id
* @clock_id: ID of the clock
* @divider: divider value
*
* This function is used by master to get divider values
* for any clock.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_clock_getdivider(u32 clock_id, u32 *divider)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
ret = zynqmp_pm_invoke_fn(PM_CLOCK_GETDIVIDER, ret_payload, 1, clock_id);
*divider = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_clock_getdivider);
/**
* zynqmp_pm_clock_setparent() - Set the clock parent for given id
* @clock_id: ID of the clock
* @parent_id: parent id
*
* This function is used by master to set parent for any clock.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_clock_setparent(u32 clock_id, u32 parent_id)
{
return zynqmp_pm_invoke_fn(PM_CLOCK_SETPARENT, NULL, 2, clock_id, parent_id);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_clock_setparent);
/**
* zynqmp_pm_clock_getparent() - Get the clock parent for given id
* @clock_id: ID of the clock
* @parent_id: parent id
*
* This function is used by master to get parent index
* for any clock.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_clock_getparent(u32 clock_id, u32 *parent_id)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
ret = zynqmp_pm_invoke_fn(PM_CLOCK_GETPARENT, ret_payload, 1, clock_id);
*parent_id = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_clock_getparent);
/**
* zynqmp_pm_set_pll_frac_mode() - PM API for set PLL mode
*
* @clk_id: PLL clock ID
* @mode: PLL mode (PLL_MODE_FRAC/PLL_MODE_INT)
*
* This function sets PLL mode
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_set_pll_frac_mode(u32 clk_id, u32 mode)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 4, 0, IOCTL_SET_PLL_FRAC_MODE, clk_id, mode);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_pll_frac_mode);
/**
* zynqmp_pm_get_pll_frac_mode() - PM API for get PLL mode
*
* @clk_id: PLL clock ID
* @mode: PLL mode
*
* This function return current PLL mode
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_get_pll_frac_mode(u32 clk_id, u32 *mode)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, mode, 3, 0, IOCTL_GET_PLL_FRAC_MODE, clk_id);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_get_pll_frac_mode);
/**
* zynqmp_pm_set_pll_frac_data() - PM API for setting pll fraction data
*
* @clk_id: PLL clock ID
* @data: fraction data
*
* This function sets fraction data.
* It is valid for fraction mode only.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_set_pll_frac_data(u32 clk_id, u32 data)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 4, 0, IOCTL_SET_PLL_FRAC_DATA, clk_id, data);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_pll_frac_data);
/**
* zynqmp_pm_get_pll_frac_data() - PM API for getting pll fraction data
*
* @clk_id: PLL clock ID
* @data: fraction data
*
* This function returns fraction data value.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_get_pll_frac_data(u32 clk_id, u32 *data)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, data, 3, 0, IOCTL_GET_PLL_FRAC_DATA, clk_id);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_get_pll_frac_data);
/**
* zynqmp_pm_set_sd_tapdelay() - Set tap delay for the SD device
*
* @node_id: Node ID of the device
* @type: Type of tap delay to set (input/output)
* @value: Value to set fot the tap delay
*
* This function sets input/output tap delay for the SD device.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_set_sd_tapdelay(u32 node_id, u32 type, u32 value)
{
u32 reg = (type == PM_TAPDELAY_INPUT) ? SD_ITAPDLY : SD_OTAPDLYSEL;
u32 mask = (node_id == NODE_SD_0) ? GENMASK(15, 0) : GENMASK(31, 16);
if (value) {
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 4, node_id, IOCTL_SET_SD_TAPDELAY, type,
value);
}
/*
* Work around completely misdesigned firmware API on Xilinx ZynqMP.
* The IOCTL_SET_SD_TAPDELAY firmware call allows the caller to only
* ever set IOU_SLCR SD_ITAPDLY Register SD0_ITAPDLYENA/SD1_ITAPDLYENA
* bits, but there is no matching call to clear those bits. If those
* bits are not cleared, SDMMC tuning may fail.
*
* Luckily, there are PM_MMIO_READ/PM_MMIO_WRITE calls which seem to
* allow complete unrestricted access to all address space, including
* IOU_SLCR SD_ITAPDLY Register and all the other registers, access
* to which was supposed to be protected by the current firmware API.
*
* Use PM_MMIO_READ/PM_MMIO_WRITE to re-implement the missing counter
* part of IOCTL_SET_SD_TAPDELAY which clears SDx_ITAPDLYENA bits.
*/
return zynqmp_pm_invoke_fn(PM_MMIO_WRITE, NULL, 2, reg, mask);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_sd_tapdelay);
/**
* zynqmp_pm_sd_dll_reset() - Reset DLL logic
*
* @node_id: Node ID of the device
* @type: Reset type
*
* This function resets DLL logic for the SD device.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_sd_dll_reset(u32 node_id, u32 type)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 3, node_id, IOCTL_SD_DLL_RESET, type);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_sd_dll_reset);
/**
* zynqmp_pm_ospi_mux_select() - OSPI Mux selection
*
* @dev_id: Device Id of the OSPI device.
* @select: OSPI Mux select value.
*
* This function select the OSPI Mux.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_ospi_mux_select(u32 dev_id, u32 select)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 3, dev_id, IOCTL_OSPI_MUX_SELECT, select);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_ospi_mux_select);
/**
* zynqmp_pm_write_ggs() - PM API for writing global general storage (ggs)
* @index: GGS register index
* @value: Register value to be written
*
* This function writes value to GGS register.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_write_ggs(u32 index, u32 value)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 4, 0, IOCTL_WRITE_GGS, index, value);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_write_ggs);
/**
* zynqmp_pm_read_ggs() - PM API for reading global general storage (ggs)
* @index: GGS register index
* @value: Register value to be written
*
* This function returns GGS register value.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_read_ggs(u32 index, u32 *value)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, value, 3, 0, IOCTL_READ_GGS, index);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_read_ggs);
/**
* zynqmp_pm_write_pggs() - PM API for writing persistent global general
* storage (pggs)
* @index: PGGS register index
* @value: Register value to be written
*
* This function writes value to PGGS register.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_write_pggs(u32 index, u32 value)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 4, 0, IOCTL_WRITE_PGGS, index, value);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_write_pggs);
/**
* zynqmp_pm_read_pggs() - PM API for reading persistent global general
* storage (pggs)
* @index: PGGS register index
* @value: Register value to be written
*
* This function returns PGGS register value.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_read_pggs(u32 index, u32 *value)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, value, 3, 0, IOCTL_READ_PGGS, index);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_read_pggs);
int zynqmp_pm_set_tapdelay_bypass(u32 index, u32 value)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 4, 0, IOCTL_SET_TAPDELAY_BYPASS, index, value);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_tapdelay_bypass);
/**
* zynqmp_pm_set_boot_health_status() - PM API for setting healthy boot status
* @value: Status value to be written
*
* This function sets healthy bit value to indicate boot health status
* to firmware.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_set_boot_health_status(u32 value)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 3, 0, IOCTL_SET_BOOT_HEALTH_STATUS, value);
}
/**
* zynqmp_pm_reset_assert - Request setting of reset (1 - assert, 0 - release)
* @reset: Reset to be configured
* @assert_flag: Flag stating should reset be asserted (1) or
* released (0)
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_reset_assert(const enum zynqmp_pm_reset reset,
const enum zynqmp_pm_reset_action assert_flag)
{
return zynqmp_pm_invoke_fn(PM_RESET_ASSERT, NULL, 2, reset, assert_flag);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_reset_assert);
/**
* zynqmp_pm_reset_get_status - Get status of the reset
* @reset: Reset whose status should be returned
* @status: Returned status
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_reset_get_status(const enum zynqmp_pm_reset reset, u32 *status)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!status)
return -EINVAL;
ret = zynqmp_pm_invoke_fn(PM_RESET_GET_STATUS, ret_payload, 1, reset);
*status = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_reset_get_status);
/**
* zynqmp_pm_fpga_load - Perform the fpga load
* @address: Address to write to
* @size: pl bitstream size
* @flags: Bitstream type
* -XILINX_ZYNQMP_PM_FPGA_FULL: FPGA full reconfiguration
* -XILINX_ZYNQMP_PM_FPGA_PARTIAL: FPGA partial reconfiguration
*
* This function provides access to pmufw. To transfer
* the required bitstream into PL.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_fpga_load(const u64 address, const u32 size, const u32 flags)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
ret = zynqmp_pm_invoke_fn(PM_FPGA_LOAD, ret_payload, 4, lower_32_bits(address),
upper_32_bits(address), size, flags);
if (ret_payload[0])
return -ret_payload[0];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_load);
/**
* zynqmp_pm_fpga_get_status - Read value from PCAP status register
* @value: Value to read
*
* This function provides access to the pmufw to get the PCAP
* status
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_fpga_get_status(u32 *value)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!value)
return -EINVAL;
ret = zynqmp_pm_invoke_fn(PM_FPGA_GET_STATUS, ret_payload, 0);
*value = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status);
/**
* zynqmp_pm_fpga_get_config_status - Get the FPGA configuration status.
* @value: Buffer to store FPGA configuration status.
*
* This function provides access to the pmufw to get the FPGA configuration
* status
*
* Return: 0 on success, a negative value on error
*/
int zynqmp_pm_fpga_get_config_status(u32 *value)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
u32 buf, lower_addr, upper_addr;
int ret;
if (!value)
return -EINVAL;
lower_addr = lower_32_bits((u64)&buf);
upper_addr = upper_32_bits((u64)&buf);
ret = zynqmp_pm_invoke_fn(PM_FPGA_READ, ret_payload, 4,
XILINX_ZYNQMP_PM_FPGA_CONFIG_STAT_OFFSET, lower_addr, upper_addr,
XILINX_ZYNQMP_PM_FPGA_READ_CONFIG_REG);
*value = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_config_status);
/**
* zynqmp_pm_pinctrl_request - Request Pin from firmware
* @pin: Pin number to request
*
* This function requests pin from firmware.
*
* Return: Returns status, either success or error+reason.
*/
int zynqmp_pm_pinctrl_request(const u32 pin)
{
return zynqmp_pm_invoke_fn(PM_PINCTRL_REQUEST, NULL, 1, pin);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_request);
/**
* zynqmp_pm_pinctrl_release - Inform firmware that Pin control is released
* @pin: Pin number to release
*
* This function release pin from firmware.
*
* Return: Returns status, either success or error+reason.
*/
int zynqmp_pm_pinctrl_release(const u32 pin)
{
return zynqmp_pm_invoke_fn(PM_PINCTRL_RELEASE, NULL, 1, pin);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_release);
/**
* zynqmp_pm_pinctrl_set_function - Set requested function for the pin
* @pin: Pin number
* @id: Function ID to set
*
* This function sets requested function for the given pin.
*
* Return: Returns status, either success or error+reason.
*/
int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id)
{
return zynqmp_pm_invoke_fn(PM_PINCTRL_SET_FUNCTION, NULL, 2, pin, id);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_function);
/**
* zynqmp_pm_pinctrl_get_config - Get configuration parameter for the pin
* @pin: Pin number
* @param: Parameter to get
* @value: Buffer to store parameter value
*
* This function gets requested configuration parameter for the given pin.
*
* Return: Returns status, either success or error+reason.
*/
int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param,
u32 *value)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!value)
return -EINVAL;
ret = zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_GET, ret_payload, 2, pin, param);
*value = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_config);
/**
* zynqmp_pm_pinctrl_set_config - Set configuration parameter for the pin
* @pin: Pin number
* @param: Parameter to set
* @value: Parameter value to set
*
* This function sets requested configuration parameter for the given pin.
*
* Return: Returns status, either success or error+reason.
*/
int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,
u32 value)
{
int ret;
if (pm_family_code == ZYNQMP_FAMILY_CODE &&
param == PM_PINCTRL_CONFIG_TRI_STATE) {
ret = zynqmp_pm_feature(PM_PINCTRL_CONFIG_PARAM_SET);
if (ret < PM_PINCTRL_PARAM_SET_VERSION)
return -EOPNOTSUPP;
}
return zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_SET, NULL, 3, pin, param, value);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_config);
/**
* zynqmp_pm_bootmode_read() - PM Config API for read bootpin status
* @ps_mode: Returned output value of ps_mode
*
* This API function is to be used for notify the power management controller
* to read bootpin status.
*
* Return: status, either success or error+reason
*/
unsigned int zynqmp_pm_bootmode_read(u32 *ps_mode)
{
unsigned int ret;
u32 ret_payload[PAYLOAD_ARG_CNT];
ret = zynqmp_pm_invoke_fn(PM_MMIO_READ, ret_payload, 1, CRL_APB_BOOT_PIN_CTRL);
*ps_mode = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_bootmode_read);
/**
* zynqmp_pm_bootmode_write() - PM Config API for Configure bootpin
* @ps_mode: Value to be written to the bootpin ctrl register
*
* This API function is to be used for notify the power management controller
* to configure bootpin.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_bootmode_write(u32 ps_mode)
{
return zynqmp_pm_invoke_fn(PM_MMIO_WRITE, NULL, 3, CRL_APB_BOOT_PIN_CTRL,
CRL_APB_BOOTPIN_CTRL_MASK, ps_mode);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_bootmode_write);
/**
* zynqmp_pm_init_finalize() - PM call to inform firmware that the caller
* master has initialized its own power management
*
* Return: Returns status, either success or error+reason
*
* This API function is to be used for notify the power management controller
* about the completed power management initialization.
*/
int zynqmp_pm_init_finalize(void)
{
return zynqmp_pm_invoke_fn(PM_PM_INIT_FINALIZE, NULL, 0);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_init_finalize);
/**
* zynqmp_pm_set_suspend_mode() - Set system suspend mode
* @mode: Mode to set for system suspend
*
* This API function is used to set mode of system suspend.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_set_suspend_mode(u32 mode)
{
return zynqmp_pm_invoke_fn(PM_SET_SUSPEND_MODE, NULL, 1, mode);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_suspend_mode);
/**
* zynqmp_pm_request_node() - Request a node with specific capabilities
* @node: Node ID of the slave
* @capabilities: Requested capabilities of the slave
* @qos: Quality of service (not supported)
* @ack: Flag to specify whether acknowledge is requested
*
* This function is used by master to request particular node from firmware.
* Every master must request node before using it.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_request_node(const u32 node, const u32 capabilities,
const u32 qos, const enum zynqmp_pm_request_ack ack)
{
return zynqmp_pm_invoke_fn(PM_REQUEST_NODE, NULL, 4, node, capabilities, qos, ack);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_request_node);
/**
* zynqmp_pm_release_node() - Release a node
* @node: Node ID of the slave
*
* This function is used by master to inform firmware that master
* has released node. Once released, master must not use that node
* without re-request.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_release_node(const u32 node)
{
return zynqmp_pm_invoke_fn(PM_RELEASE_NODE, NULL, 1, node);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_release_node);
/**
* zynqmp_pm_get_rpu_mode() - Get RPU mode
* @node_id: Node ID of the device
* @rpu_mode: return by reference value
* either split or lockstep
*
* Return: return 0 on success or error+reason.
* if success, then rpu_mode will be set
* to current rpu mode.
*/
int zynqmp_pm_get_rpu_mode(u32 node_id, enum rpu_oper_mode *rpu_mode)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
ret = zynqmp_pm_invoke_fn(PM_IOCTL, ret_payload, 2, node_id, IOCTL_GET_RPU_OPER_MODE);
/* only set rpu_mode if no error */
if (ret == XST_PM_SUCCESS)
*rpu_mode = ret_payload[0];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_get_rpu_mode);
/**
* zynqmp_pm_set_rpu_mode() - Set RPU mode
* @node_id: Node ID of the device
* @rpu_mode: Argument 1 to requested IOCTL call. either split or lockstep
*
* This function is used to set RPU mode to split or
* lockstep
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_set_rpu_mode(u32 node_id, enum rpu_oper_mode rpu_mode)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 3, node_id, IOCTL_SET_RPU_OPER_MODE,
(u32)rpu_mode);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_rpu_mode);
/**
* zynqmp_pm_set_tcm_config - configure TCM
* @node_id: Firmware specific TCM subsystem ID
* @tcm_mode: Argument 1 to requested IOCTL call
* either PM_RPU_TCM_COMB or PM_RPU_TCM_SPLIT
*
* This function is used to set RPU mode to split or combined
*
* Return: status: 0 for success, else failure
*/
int zynqmp_pm_set_tcm_config(u32 node_id, enum rpu_tcm_comb tcm_mode)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 3, node_id, IOCTL_TCM_COMB_CONFIG,
(u32)tcm_mode);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_tcm_config);
/**
* zynqmp_pm_force_pwrdwn - PM call to request for another PU or subsystem to
* be powered down forcefully
* @node: Node ID of the targeted PU or subsystem
* @ack: Flag to specify whether acknowledge is requested
*
* Return: status, either success or error+reason
*/
int zynqmp_pm_force_pwrdwn(const u32 node,
const enum zynqmp_pm_request_ack ack)
{
return zynqmp_pm_invoke_fn(PM_FORCE_POWERDOWN, NULL, 2, node, ack);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_force_pwrdwn);
/**
* zynqmp_pm_request_wake - PM call to wake up selected master or subsystem
* @node: Node ID of the master or subsystem
* @set_addr: Specifies whether the address argument is relevant
* @address: Address from which to resume when woken up
* @ack: Flag to specify whether acknowledge requested
*
* Return: status, either success or error+reason
*/
int zynqmp_pm_request_wake(const u32 node,
const bool set_addr,
const u64 address,
const enum zynqmp_pm_request_ack ack)
{
/* set_addr flag is encoded into 1st bit of address */
return zynqmp_pm_invoke_fn(PM_REQUEST_WAKEUP, NULL, 4, node, address | set_addr,
address >> 32, ack);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_request_wake);
/**
* zynqmp_pm_set_requirement() - PM call to set requirement for PM slaves
* @node: Node ID of the slave
* @capabilities: Requested capabilities of the slave
* @qos: Quality of service (not supported)
* @ack: Flag to specify whether acknowledge is requested
*
* This API function is to be used for slaves a PU already has requested
* to change its capabilities.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
const u32 qos,
const enum zynqmp_pm_request_ack ack)
{
return zynqmp_pm_invoke_fn(PM_SET_REQUIREMENT, NULL, 4, node, capabilities, qos, ack);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_requirement);
/**
* zynqmp_pm_load_pdi - Load and process PDI
* @src: Source device where PDI is located
* @address: PDI src address
*
* This function provides support to load PDI from linux
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_load_pdi(const u32 src, const u64 address)
{
return zynqmp_pm_invoke_fn(PM_LOAD_PDI, NULL, 3, src, lower_32_bits(address),
upper_32_bits(address));
}
EXPORT_SYMBOL_GPL(zynqmp_pm_load_pdi);
/**
* zynqmp_pm_aes_engine - Access AES hardware to encrypt/decrypt the data using
* AES-GCM core.
* @address: Address of the AesParams structure.
* @out: Returned output value
*
* Return: Returns status, either success or error code.
*/
int zynqmp_pm_aes_engine(const u64 address, u32 *out)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!out)
return -EINVAL;
ret = zynqmp_pm_invoke_fn(PM_SECURE_AES, ret_payload, 2, upper_32_bits(address),
lower_32_bits(address));
*out = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_aes_engine);
/**
* zynqmp_pm_efuse_access - Provides access to efuse memory.
* @address: Address of the efuse params structure
* @out: Returned output value
*
* Return: Returns status, either success or error code.
*/
int zynqmp_pm_efuse_access(const u64 address, u32 *out)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!out)
return -EINVAL;
ret = zynqmp_pm_invoke_fn(PM_EFUSE_ACCESS, ret_payload, 2,
upper_32_bits(address),
lower_32_bits(address));
*out = ret_payload[1];
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_efuse_access);
/**
* zynqmp_pm_sha_hash - Access the SHA engine to calculate the hash
* @address: Address of the data/ Address of output buffer where
* hash should be stored.
* @size: Size of the data.
* @flags:
* BIT(0) - for initializing csudma driver and SHA3(Here address
* and size inputs can be NULL).
* BIT(1) - to call Sha3_Update API which can be called multiple
* times when data is not contiguous.
* BIT(2) - to get final hash of the whole updated data.
* Hash will be overwritten at provided address with
* 48 bytes.
*
* Return: Returns status, either success or error code.
*/
int zynqmp_pm_sha_hash(const u64 address, const u32 size, const u32 flags)
{
u32 lower_addr = lower_32_bits(address);
u32 upper_addr = upper_32_bits(address);
return zynqmp_pm_invoke_fn(PM_SECURE_SHA, NULL, 4, upper_addr, lower_addr, size, flags);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_sha_hash);
/**
* zynqmp_pm_register_notifier() - PM API for register a subsystem
* to be notified about specific
* event/error.
* @node: Node ID to which the event is related.
* @event: Event Mask of Error events for which wants to get notified.
* @wake: Wake subsystem upon capturing the event if value 1
* @enable: Enable the registration for value 1, disable for value 0
*
* This function is used to register/un-register for particular node-event
* combination in firmware.
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_register_notifier(const u32 node, const u32 event,
const u32 wake, const u32 enable)
{
return zynqmp_pm_invoke_fn(PM_REGISTER_NOTIFIER, NULL, 4, node, event, wake, enable);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_register_notifier);
/**
* zynqmp_pm_system_shutdown - PM call to request a system shutdown or restart
* @type: Shutdown or restart? 0 for shutdown, 1 for restart
* @subtype: Specifies which system should be restarted or shut down
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype)
{
return zynqmp_pm_invoke_fn(PM_SYSTEM_SHUTDOWN, NULL, 2, type, subtype);
}
/**
* zynqmp_pm_set_feature_config - PM call to request IOCTL for feature config
* @id: The config ID of the feature to be configured
* @value: The config value of the feature to be configured
*
* Return: Returns 0 on success or error value on failure.
*/
int zynqmp_pm_set_feature_config(enum pm_feature_config_id id, u32 value)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 4, 0, IOCTL_SET_FEATURE_CONFIG, id, value);
}
/**
* zynqmp_pm_get_feature_config - PM call to get value of configured feature
* @id: The config id of the feature to be queried
* @payload: Returned value array
*
* Return: Returns 0 on success or error value on failure.
*/
int zynqmp_pm_get_feature_config(enum pm_feature_config_id id,
u32 *payload)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, payload, 3, 0, IOCTL_GET_FEATURE_CONFIG, id);
}
/**
* zynqmp_pm_set_sd_config - PM call to set value of SD config registers
* @node: SD node ID
* @config: The config type of SD registers
* @value: Value to be set
*
* Return: Returns 0 on success or error value on failure.
*/
int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 4, node, IOCTL_SET_SD_CONFIG, config, value);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_sd_config);
/**
* zynqmp_pm_set_gem_config - PM call to set value of GEM config registers
* @node: GEM node ID
* @config: The config type of GEM registers
* @value: Value to be set
*
* Return: Returns 0 on success or error value on failure.
*/
int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config,
u32 value)
{
return zynqmp_pm_invoke_fn(PM_IOCTL, NULL, 4, node, IOCTL_SET_GEM_CONFIG, config, value);
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_gem_config);
/**
* struct zynqmp_pm_shutdown_scope - Struct for shutdown scope
* @subtype: Shutdown subtype
* @name: Matching string for scope argument
*
* This struct encapsulates mapping between shutdown scope ID and string.
*/
struct zynqmp_pm_shutdown_scope {
const enum zynqmp_pm_shutdown_subtype subtype;
const char *name;
};
static struct zynqmp_pm_shutdown_scope shutdown_scopes[] = {
[ZYNQMP_PM_SHUTDOWN_SUBTYPE_SUBSYSTEM] = {
.subtype = ZYNQMP_PM_SHUTDOWN_SUBTYPE_SUBSYSTEM,
.name = "subsystem",
},
[ZYNQMP_PM_SHUTDOWN_SUBTYPE_PS_ONLY] = {
.subtype = ZYNQMP_PM_SHUTDOWN_SUBTYPE_PS_ONLY,
.name = "ps_only",
},
[ZYNQMP_PM_SHUTDOWN_SUBTYPE_SYSTEM] = {
.subtype = ZYNQMP_PM_SHUTDOWN_SUBTYPE_SYSTEM,
.name = "system",
},
};
static struct zynqmp_pm_shutdown_scope *selected_scope =
&shutdown_scopes[ZYNQMP_PM_SHUTDOWN_SUBTYPE_SYSTEM];
/**
* zynqmp_pm_is_shutdown_scope_valid - Check if shutdown scope string is valid
* @scope_string: Shutdown scope string
*
* Return: Return pointer to matching shutdown scope struct from
* array of available options in system if string is valid,
* otherwise returns NULL.
*/
static struct zynqmp_pm_shutdown_scope*
zynqmp_pm_is_shutdown_scope_valid(const char *scope_string)
{
int count;
for (count = 0; count < ARRAY_SIZE(shutdown_scopes); count++)
if (sysfs_streq(scope_string, shutdown_scopes[count].name))
return &shutdown_scopes[count];
return NULL;
}
static ssize_t shutdown_scope_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
int i;
for (i = 0; i < ARRAY_SIZE(shutdown_scopes); i++) {
if (&shutdown_scopes[i] == selected_scope) {
strcat(buf, "[");
strcat(buf, shutdown_scopes[i].name);
strcat(buf, "]");
} else {
strcat(buf, shutdown_scopes[i].name);
}
strcat(buf, " ");
}
strcat(buf, "\n");
return strlen(buf);
}
static ssize_t shutdown_scope_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
struct zynqmp_pm_shutdown_scope *scope;
scope = zynqmp_pm_is_shutdown_scope_valid(buf);
if (!scope)
return -EINVAL;
ret = zynqmp_pm_system_shutdown(ZYNQMP_PM_SHUTDOWN_TYPE_SETSCOPE_ONLY,
scope->subtype);
if (ret) {
pr_err("unable to set shutdown scope %s\n", buf);
return ret;
}
selected_scope = scope;
return count;
}
static DEVICE_ATTR_RW(shutdown_scope);
static ssize_t health_status_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
unsigned int value;
ret = kstrtouint(buf, 10, &value);
if (ret)
return ret;
ret = zynqmp_pm_set_boot_health_status(value);
if (ret) {
dev_err(device, "unable to set healthy bit value to %u\n",
value);
return ret;
}
return count;
}
static DEVICE_ATTR_WO(health_status);
static ssize_t ggs_show(struct device *device,
struct device_attribute *attr,
char *buf,
u32 reg)
{
int ret;
u32 ret_payload[PAYLOAD_ARG_CNT];
ret = zynqmp_pm_read_ggs(reg, ret_payload);
if (ret)
return ret;
return sprintf(buf, "0x%x\n", ret_payload[1]);
}
static ssize_t ggs_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count,
u32 reg)
{
long value;
int ret;
if (reg >= GSS_NUM_REGS)
return -EINVAL;
ret = kstrtol(buf, 16, &value);
if (ret) {
count = -EFAULT;
goto err;
}
ret = zynqmp_pm_write_ggs(reg, value);
if (ret)
count = -EFAULT;
err:
return count;
}
/* GGS register show functions */
#define GGS0_SHOW(N) \
ssize_t ggs##N##_show(struct device *device, \
struct device_attribute *attr, \
char *buf) \
{ \
return ggs_show(device, attr, buf, N); \
}
static GGS0_SHOW(0);
static GGS0_SHOW(1);
static GGS0_SHOW(2);
static GGS0_SHOW(3);
/* GGS register store function */
#define GGS0_STORE(N) \
ssize_t ggs##N##_store(struct device *device, \
struct device_attribute *attr, \
const char *buf, \
size_t count) \
{ \
return ggs_store(device, attr, buf, count, N); \
}
static GGS0_STORE(0);
static GGS0_STORE(1);
static GGS0_STORE(2);
static GGS0_STORE(3);
static ssize_t pggs_show(struct device *device,
struct device_attribute *attr,
char *buf,
u32 reg)
{
int ret;
u32 ret_payload[PAYLOAD_ARG_CNT];
ret = zynqmp_pm_read_pggs(reg, ret_payload);
if (ret)
return ret;
return sprintf(buf, "0x%x\n", ret_payload[1]);
}
static ssize_t pggs_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count,
u32 reg)
{
long value;
int ret;
if (reg >= GSS_NUM_REGS)
return -EINVAL;
ret = kstrtol(buf, 16, &value);
if (ret) {
count = -EFAULT;
goto err;
}
ret = zynqmp_pm_write_pggs(reg, value);
if (ret)
count = -EFAULT;
err:
return count;
}
#define PGGS0_SHOW(N) \
ssize_t pggs##N##_show(struct device *device, \
struct device_attribute *attr, \
char *buf) \
{ \
return pggs_show(device, attr, buf, N); \
}
#define PGGS0_STORE(N) \
ssize_t pggs##N##_store(struct device *device, \
struct device_attribute *attr, \
const char *buf, \
size_t count) \
{ \
return pggs_store(device, attr, buf, count, N); \
}
/* PGGS register show functions */
static PGGS0_SHOW(0);
static PGGS0_SHOW(1);
static PGGS0_SHOW(2);
static PGGS0_SHOW(3);
/* PGGS register store functions */
static PGGS0_STORE(0);
static PGGS0_STORE(1);
static PGGS0_STORE(2);
static PGGS0_STORE(3);
/* GGS register attributes */
static DEVICE_ATTR_RW(ggs0);
static DEVICE_ATTR_RW(ggs1);
static DEVICE_ATTR_RW(ggs2);
static DEVICE_ATTR_RW(ggs3);
/* PGGS register attributes */
static DEVICE_ATTR_RW(pggs0);
static DEVICE_ATTR_RW(pggs1);
static DEVICE_ATTR_RW(pggs2);
static DEVICE_ATTR_RW(pggs3);
static ssize_t feature_config_id_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct zynqmp_devinfo *devinfo = dev_get_drvdata(device);
return sysfs_emit(buf, "%d\n", devinfo->feature_conf_id);
}
static ssize_t feature_config_id_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
u32 config_id;
int ret;
struct zynqmp_devinfo *devinfo = dev_get_drvdata(device);
if (!buf)
return -EINVAL;
ret = kstrtou32(buf, 10, &config_id);
if (ret)
return ret;
devinfo->feature_conf_id = config_id;
return count;
}
static DEVICE_ATTR_RW(feature_config_id);
static ssize_t feature_config_value_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
int ret;
u32 ret_payload[PAYLOAD_ARG_CNT];
struct zynqmp_devinfo *devinfo = dev_get_drvdata(device);
ret = zynqmp_pm_get_feature_config(devinfo->feature_conf_id,
ret_payload);
if (ret)
return ret;
return sysfs_emit(buf, "%d\n", ret_payload[1]);
}
static ssize_t feature_config_value_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
u32 value;
int ret;
struct zynqmp_devinfo *devinfo = dev_get_drvdata(device);
if (!buf)
return -EINVAL;
ret = kstrtou32(buf, 10, &value);
if (ret)
return ret;
ret = zynqmp_pm_set_feature_config(devinfo->feature_conf_id,
value);
if (ret)
return ret;
return count;
}
static DEVICE_ATTR_RW(feature_config_value);
static struct attribute *zynqmp_firmware_attrs[] = {
&dev_attr_ggs0.attr,
&dev_attr_ggs1.attr,
&dev_attr_ggs2.attr,
&dev_attr_ggs3.attr,
&dev_attr_pggs0.attr,
&dev_attr_pggs1.attr,
&dev_attr_pggs2.attr,
&dev_attr_pggs3.attr,
&dev_attr_shutdown_scope.attr,
&dev_attr_health_status.attr,
&dev_attr_feature_config_id.attr,
&dev_attr_feature_config_value.attr,
NULL,
};
ATTRIBUTE_GROUPS(zynqmp_firmware);
static int zynqmp_firmware_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct zynqmp_devinfo *devinfo;
int ret;
ret = get_set_conduit_method(dev->of_node);
if (ret)
return ret;
ret = do_feature_check_call(PM_FEATURE_CHECK);
if (ret >= 0 && ((ret & FIRMWARE_VERSION_MASK) >= PM_API_VERSION_1))
feature_check_enabled = true;
devinfo = devm_kzalloc(dev, sizeof(*devinfo), GFP_KERNEL);
if (!devinfo)
return -ENOMEM;
devinfo->dev = dev;
platform_set_drvdata(pdev, devinfo);
/* Check PM API version number */
ret = zynqmp_pm_get_api_version(&pm_api_version);
if (ret)
return ret;
if (pm_api_version < ZYNQMP_PM_VERSION) {
panic("%s Platform Management API version error. Expected: v%d.%d - Found: v%d.%d\n",
__func__,
ZYNQMP_PM_VERSION_MAJOR, ZYNQMP_PM_VERSION_MINOR,
pm_api_version >> 16, pm_api_version & 0xFFFF);
}
pr_info("%s Platform Management API v%d.%d\n", __func__,
pm_api_version >> 16, pm_api_version & 0xFFFF);
/* Get the Family code and sub family code of platform */
ret = zynqmp_pm_get_family_info(&pm_family_code, &pm_sub_family_code);
if (ret < 0)
return ret;
/* Check trustzone version number */
ret = zynqmp_pm_get_trustzone_version(&pm_tz_version);
if (ret)
panic("Legacy trustzone found without version support\n");
if (pm_tz_version < ZYNQMP_TZ_VERSION)
panic("%s Trustzone version error. Expected: v%d.%d - Found: v%d.%d\n",
__func__,
ZYNQMP_TZ_VERSION_MAJOR, ZYNQMP_TZ_VERSION_MINOR,
pm_tz_version >> 16, pm_tz_version & 0xFFFF);
pr_info("%s Trustzone version v%d.%d\n", __func__,
pm_tz_version >> 16, pm_tz_version & 0xFFFF);
ret = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, firmware_devs,
ARRAY_SIZE(firmware_devs), NULL, 0, NULL);
if (ret) {
dev_err(&pdev->dev, "failed to add MFD devices %d\n", ret);
return ret;
}
zynqmp_pm_api_debugfs_init();
if (pm_family_code == VERSAL_FAMILY_CODE) {
em_dev = platform_device_register_data(&pdev->dev, "xlnx_event_manager",
-1, NULL, 0);
if (IS_ERR(em_dev))
dev_err_probe(&pdev->dev, PTR_ERR(em_dev), "EM register fail with error\n");
}
return of_platform_populate(dev->of_node, NULL, NULL, dev);
}
static void zynqmp_firmware_remove(struct platform_device *pdev)
{
struct pm_api_feature_data *feature_data;
struct hlist_node *tmp;
int i;
mfd_remove_devices(&pdev->dev);
zynqmp_pm_api_debugfs_exit();
hash_for_each_safe(pm_api_features_map, i, tmp, feature_data, hentry) {
hash_del(&feature_data->hentry);
kfree(feature_data);
}
platform_device_unregister(em_dev);
}
static const struct of_device_id zynqmp_firmware_of_match[] = {
{.compatible = "xlnx,zynqmp-firmware"},
{.compatible = "xlnx,versal-firmware"},
{},
};
MODULE_DEVICE_TABLE(of, zynqmp_firmware_of_match);
static struct platform_driver zynqmp_firmware_driver = {
.driver = {
.name = "zynqmp_firmware",
.of_match_table = zynqmp_firmware_of_match,
.dev_groups = zynqmp_firmware_groups,
},
.probe = zynqmp_firmware_probe,
.remove_new = zynqmp_firmware_remove,
};
module_platform_driver(zynqmp_firmware_driver);
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