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zephyr/drivers/mbox/mbox_nxp_s32_mru.c

324 lines
9.4 KiB
C
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/*
* Copyright 2022 NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/drivers/mbox.h>
#include <zephyr/irq.h>
#include <zephyr/sys/util_macro.h>
#include <Mru_Ip.h>
#define LOG_LEVEL CONFIG_MBOX_LOG_LEVEL
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(nxp_s32_mru);
#define MRU_MAX_INT_GROUPS 2
#define MRU_MAX_CHANNELS 12
#define MRU_MAX_MBOX_PER_CHAN 1
#define MRU_MBOX_SIZE 4
#define MRU_CHANNEL_OFFSET 0x1000
#define MRU_NODE(n) DT_NODELABEL(mru##n)
#define MRU_BASE(n) ((RTU_MRU_Type *)DT_REG_ADDR(MRU_NODE(n)))
#define MRU_RX_CHANNELS(n) DT_PROP_OR(MRU_NODE(n), rx_channels, 0)
#define MRU_MBOX_ADDR(n, ch, mb) \
(DT_REG_ADDR(MRU_NODE(n)) + ((ch + 1) * MRU_CHANNEL_OFFSET) + (MRU_MBOX_SIZE * mb))
/* Utility macros to convert from GIC index to interrupt group index */
#define _MRU_IRQ_17 MRU_IP_INT_GROUP_0
#define _MRU_IRQ_18 MRU_IP_INT_GROUP_1
#define MRU_INT_GROUP(irq) _CONCAT(_MRU_IRQ_, irq)
#define _CONCAT7(...) DT_CAT7(__VA_ARGS__)
#define MRU_ISR_FUNC(n) \
_CONCAT7(Mru_Ip_RTU, CONFIG_NXP_S32_RTU_INDEX, _MRU, n, _Int, \
MRU_INT_GROUP(DT_IRQN(MRU_NODE(n))), _IRQHandler)
struct nxp_s32_mru_data {
mbox_callback_t cb[MRU_MAX_CHANNELS];
void *user_data[MRU_MAX_CHANNELS];
};
struct nxp_s32_mru_config {
RTU_MRU_Type *base;
Mru_Ip_ConfigType hw_cfg;
void (*config_irq)(void);
};
static inline bool is_rx_channel_valid(const struct device *dev, uint32_t ch)
{
const struct nxp_s32_mru_config *cfg = dev->config;
return ((ch < MRU_MAX_CHANNELS) && (ch < cfg->hw_cfg.NumChannel));
}
/* Get a channel's mailbox address, no boundaries validation */
static inline uintptr_t get_mbox_addr(const struct device *dev, uint32_t channel,
uint32_t mbox)
{
const struct nxp_s32_mru_config *cfg = dev->config;
return ((uintptr_t)cfg->base + (channel + 1) * MRU_CHANNEL_OFFSET
+ mbox * MRU_MBOX_SIZE);
}
static int nxp_s32_mru_send(const struct device *dev, uint32_t channel,
const struct mbox_msg *msg)
{
const struct nxp_s32_mru_config *cfg = dev->config;
uint32_t *tx_mbox_addr[MRU_MAX_MBOX_PER_CHAN];
Mru_Ip_TransmitChannelType tx_cfg;
Mru_Ip_StatusType status;
if (channel >= MRU_MAX_CHANNELS) {
return -EINVAL;
}
if (msg == NULL) {
return -EINVAL;
} else if (msg->size > (MRU_MBOX_SIZE * MRU_MAX_MBOX_PER_CHAN)) {
return -EMSGSIZE;
}
for (int i = 0; i < MRU_MAX_MBOX_PER_CHAN; i++) {
tx_mbox_addr[i] = (uint32_t *)get_mbox_addr(dev, channel, i);
}
tx_cfg.NumTxMB = MRU_MAX_MBOX_PER_CHAN,
tx_cfg.LastTxMBIndex = MRU_MAX_MBOX_PER_CHAN - 1,
tx_cfg.MBAddList = (volatile uint32 * const *)tx_mbox_addr,
tx_cfg.ChMBSTATAdd = &cfg->base->CHXCONFIG[channel].CH_MBSTAT,
status = Mru_Ip_Transmit(&tx_cfg, (const uint32_t *)msg->data);
return (status == MRU_IP_STATUS_SUCCESS ? 0 : -EBUSY);
}
static int nxp_s32_mru_register_callback(const struct device *dev, uint32_t channel,
mbox_callback_t cb, void *user_data)
{
struct nxp_s32_mru_data *data = dev->data;
if (!is_rx_channel_valid(dev, channel)) {
return -EINVAL;
}
data->cb[channel] = cb;
data->user_data[channel] = user_data;
return 0;
}
static int nxp_s32_mru_mtu_get(const struct device *dev)
{
return (MRU_MBOX_SIZE * MRU_MAX_MBOX_PER_CHAN);
}
static uint32_t nxp_s32_mru_max_channels_get(const struct device *dev)
{
return MRU_MAX_CHANNELS;
}
static int nxp_s32_mru_set_enabled(const struct device *dev, uint32_t channel,
bool enable)
{
struct nxp_s32_mru_data *data = dev->data;
const struct nxp_s32_mru_config *cfg = dev->config;
const Mru_Ip_ChannelCfgType *ch_cfg = cfg->hw_cfg.ChannelCfg;
if (!is_rx_channel_valid(dev, channel)) {
return -EINVAL;
}
if (enable && (data->cb[channel] == NULL)) {
LOG_WRN("Enabling channel without a registered callback\n");
}
if (enable) {
/*
* Make the channel's registers writable and then once again after
* enabling interrupts and mailboxes so remote can transmit
*/
*ch_cfg[channel].ChCFG0Add = RTU_MRU_CH_CFG0_CHE(1);
*ch_cfg[channel].ChCFG0Add = RTU_MRU_CH_CFG0_IE(1)
| RTU_MRU_CH_CFG0_MBE0(1)
| RTU_MRU_CH_CFG0_CHE(1);
} else {
/*
* Disable interrupts and mailboxes on this channel, making
* the channel's registers not writable afterwards
*/
*ch_cfg[channel].ChCFG0Add = RTU_MRU_CH_CFG0_IE(0)
| RTU_MRU_CH_CFG0_MBE0(0);
}
return 0;
}
static int nxp_s32_mru_init(const struct device *dev)
{
const struct nxp_s32_mru_config *cfg = dev->config;
if (cfg->hw_cfg.NumChannel == 0) {
/* Nothing to do if no Rx channels are configured */
return 0;
}
/* All configured Rx channels will be disabled after this call */
Mru_Ip_Init(&cfg->hw_cfg);
/*
* Configure and enable interrupt group, but channel's interrupt are
* disabled until calling .set_enabled()
*/
cfg->config_irq();
return 0;
}
static const struct mbox_driver_api nxp_s32_mru_driver_api = {
.send = nxp_s32_mru_send,
.register_callback = nxp_s32_mru_register_callback,
.mtu_get = nxp_s32_mru_mtu_get,
.max_channels_get = nxp_s32_mru_max_channels_get,
.set_enabled = nxp_s32_mru_set_enabled,
};
#define MRU_ISR_FUNC_DECLARE(n) extern void MRU_ISR_FUNC(n)(void)
#define MRU_INIT_IRQ_FUNC(n) \
MRU_ISR_FUNC_DECLARE(n); \
static void nxp_s32_mru_##n##_init_irq(void) \
{ \
IRQ_CONNECT(DT_IRQN(MRU_NODE(n)), \
DT_IRQ(MRU_NODE(n), priority), \
MRU_ISR_FUNC(n), \
NULL, \
DT_IRQ(MRU_NODE(n), flags)); \
irq_enable(DT_IRQN(MRU_NODE(n))); \
}
#define MRU_CH_RX_CFG(i, n) \
static volatile const uint32_t * const \
nxp_s32_mru_##n##_ch_##i##_rx_mbox_addr[MRU_MAX_MBOX_PER_CHAN] = { \
(uint32_t *const)MRU_MBOX_ADDR(n, i, 0), \
}; \
static uint32_t nxp_s32_mru_##n##_ch_##i##_buf[MRU_MAX_MBOX_PER_CHAN]; \
static const Mru_Ip_ReceiveChannelType nxp_s32_mru_##n##_ch_##i##_rx_cfg = { \
.ChannelId = i, \
.InstanceId = n, \
.ChannelIndex = i, \
.NumRxMB = MRU_MAX_MBOX_PER_CHAN, \
.MBAddList = nxp_s32_mru_##n##_ch_##i##_rx_mbox_addr, \
.RxBuffer = nxp_s32_mru_##n##_ch_##i##_buf, \
.ReceiveNotification = nxp_s32_mru_##n##_cb \
}
#define MRU_CH_RX_LINK_CFG_MBOX(i, n, chan, intgroup) \
{ \
[intgroup] = { &nxp_s32_mru_##n##_ch_##chan##_rx_cfg } \
}
#define MRU_CH_RX_LINK_CFG(i, n) \
static const Mru_Ip_MBLinkReceiveChannelType \
nxp_s32_mru_##n##_ch_##i##_rx_link_cfg[MRU_MAX_MBOX_PER_CHAN][MRU_MAX_INT_GROUPS] = {\
MRU_CH_RX_LINK_CFG_MBOX(0, n, i, MRU_INT_GROUP(DT_IRQN(MRU_NODE(n)))) \
}
#define MRU_CH_CFG(i, n) \
{ \
.ChCFG0Add = &MRU_BASE(n)->CHXCONFIG[i].CH_CFG0, \
.ChCFG0 = RTU_MRU_CH_CFG0_IE(0) | RTU_MRU_CH_CFG0_MBE0(0), \
.ChCFG1Add = &MRU_BASE(n)->CHXCONFIG[i].CH_CFG1, \
.ChCFG1 = RTU_MRU_CH_CFG1_MBIC0(MRU_INT_GROUP(DT_IRQN(MRU_NODE(n)))), \
.ChMBSTATAdd = &MRU_BASE(n)->CHXCONFIG[i].CH_MBSTAT, \
.NumMailbox = MRU_MAX_MBOX_PER_CHAN, \
.MBLinkReceiveChCfg = nxp_s32_mru_##n##_ch_##i##_rx_link_cfg \
}
/* Callback wrapper to adapt MRU's baremetal driver callback to Zephyr's mbox driver callback */
#define MRU_CALLBACK_WRAPPER_FUNC(n) \
void nxp_s32_mru_##n##_cb(uint8_t channel, const uint32_t *buf, uint8_t mbox_count) \
{ \
const struct device *dev = DEVICE_DT_GET(MRU_NODE(n)); \
struct nxp_s32_mru_data *data = dev->data; \
\
if (is_rx_channel_valid(dev, channel)) { \
if (data->cb[channel] != NULL) { \
struct mbox_msg msg = { \
.data = (const void *)buf, \
.size = mbox_count * MRU_MBOX_SIZE \
}; \
data->cb[channel](dev, channel, data->user_data[channel], &msg);\
} \
} \
}
#define MRU_CH_RX_DEFINITIONS(n) \
MRU_CALLBACK_WRAPPER_FUNC(n) \
MRU_INIT_IRQ_FUNC(n) \
LISTIFY(MRU_RX_CHANNELS(n), MRU_CH_RX_CFG, (;), n); \
LISTIFY(MRU_RX_CHANNELS(n), MRU_CH_RX_LINK_CFG, (;), n); \
static const Mru_Ip_ChannelCfgType nxp_s32_mru_##n##_ch_cfg[] = { \
LISTIFY(MRU_RX_CHANNELS(n), MRU_CH_CFG, (,), n) \
}
#define MRU_INSTANCE_DEFINE(n) \
COND_CODE_0(MRU_RX_CHANNELS(n), (EMPTY), (MRU_CH_RX_DEFINITIONS(n))); \
static struct nxp_s32_mru_data nxp_s32_mru_##n##_data; \
static struct nxp_s32_mru_config nxp_s32_mru_##n##_config = { \
.base = MRU_BASE(n), \
.hw_cfg = { \
.InstanceId = n, \
.StateIndex = n, \
.NumChannel = MRU_RX_CHANNELS(n), \
.ChannelCfg = COND_CODE_0(MRU_RX_CHANNELS(n), \
(NULL), (nxp_s32_mru_##n##_ch_cfg)), \
.NOTIFYAdd = { \
&MRU_BASE(n)->NOTIFY0, \
&MRU_BASE(n)->NOTIFY1 \
}, \
}, \
.config_irq = COND_CODE_0(MRU_RX_CHANNELS(n), \
(NULL), (nxp_s32_mru_##n##_init_irq)), \
}; \
\
DEVICE_DT_DEFINE(MRU_NODE(n), nxp_s32_mru_init, NULL, \
&nxp_s32_mru_##n##_data, &nxp_s32_mru_##n##_config, \
POST_KERNEL, CONFIG_MBOX_INIT_PRIORITY, \
&nxp_s32_mru_driver_api)
#if DT_NODE_HAS_STATUS(MRU_NODE(0), okay)
MRU_INSTANCE_DEFINE(0);
#endif
#if DT_NODE_HAS_STATUS(MRU_NODE(1), okay)
MRU_INSTANCE_DEFINE(1);
#endif
#if DT_NODE_HAS_STATUS(MRU_NODE(2), okay)
MRU_INSTANCE_DEFINE(2);
#endif
#if DT_NODE_HAS_STATUS(MRU_NODE(3), okay)
MRU_INSTANCE_DEFINE(3);
#endif
#if DT_NODE_HAS_STATUS(MRU_NODE(4), okay)
MRU_INSTANCE_DEFINE(4);
#endif
#if DT_NODE_HAS_STATUS(MRU_NODE(5), okay)
MRU_INSTANCE_DEFINE(5);
#endif
#if DT_NODE_HAS_STATUS(MRU_NODE(6), okay)
MRU_INSTANCE_DEFINE(6);
#endif
#if DT_NODE_HAS_STATUS(MRU_NODE(7), okay)
MRU_INSTANCE_DEFINE(7);
#endif
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