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/*
* this is only for , adopt to other must change the m and n.
*/
#include "../platform-msgbox.h"
#include "hal_msgbox.h"
#include "hal_interrupt.h"
#include "aw_io.h"
#include "hal_clk.h"
#include "hal_reset.h"
static struct msg_endpoint *it_edp = NULL;
#define MSGBOX_MAX_QUEUE 8
static inline int calculte_n(int local, int remote)
{
if (remote < local)
return remote;
else
return remote - 1;
}
static void irq_msgbox_channel_handler(struct msg_endpoint *medp)
{
void *msg_sts, *msg_reg, *msg_irq_s;
u32 data;
msg_sts = (void *)MSGBOX_MSG_STA_REG(
medp->local_amp, calculte_n(medp->local_amp, medp->remote_amp),
medp->read_ch);
msg_reg = (void *)MSGBOX_MSG_REG(
medp->local_amp, calculte_n(medp->local_amp, medp->remote_amp),
medp->read_ch);
msg_irq_s = (void *)MSGBOX_RD_IRQ_STA_REG(
medp->local_amp, calculte_n(medp->local_amp, medp->remote_amp));
while (readl(msg_sts)) {
data = readl(msg_reg);
if (medp->rec)
medp->rec(data, medp->private);
}
writel(1 << (medp->read_ch * 2), msg_irq_s);
}
static int irq_msgbox_handler(int i, void *p)
{
struct msg_endpoint *t;
for (t = it_edp; t != NULL; t = t->next) {
irq_msgbox_channel_handler(t);
}
return 0;
}
uint32_t hal_msgbox_init(void)
{
struct reset_control *rst;
hal_clk_t clk;
rst = hal_reset_control_get(HAL_SUNXI_RESET, RST_MSGBOX);
hal_reset_control_deassert(rst);
hal_reset_control_put(rst);
clk = hal_clock_get(HAL_SUNXI_CCU, CLK_MSGBOX);
hal_clock_enable(clk);
hal_clock_put(clk);
irq_request(IRQ_MSGBOX, irq_msgbox_handler, it_edp);
irq_enable(IRQ_MSGBOX);
return 0;
}
static void msgbox_enable_rec_int(struct msg_endpoint *medp)
{
void *msg_irq_e;
msg_irq_e = (void *)MSGBOX_RD_IRQ_EN_REG(
medp->local_amp, calculte_n(medp->local_amp, medp->remote_amp));
writel(1 << (medp->read_ch * 2), msg_irq_e);
}
uint32_t hal_msgbox_alloc_channel(struct msg_endpoint *edp, uint32_t remote,
uint32_t read, uint32_t write)
{
edp->local_amp = THIS_MSGBOX_USE;
edp->remote_amp = remote;
edp->read_ch = read;
edp->write_ch = write;
/* add to global list */
if (it_edp == NULL) {
it_edp = edp;
} else {
struct msg_endpoint *t = it_edp;
while (t) {
if (t->next == NULL) {
t->next = edp;
break;
}
t = t->next;
}
}
edp->next = NULL;
msgbox_enable_rec_int(edp);
return 0;
}
static void msgbox_channel_send_data(struct msg_endpoint *medp, u32 data)
{
void *msg_sts, *msg_reg;
msg_sts = (void *)MSGBOX_MSG_STA_REG(
medp->remote_amp, calculte_n(medp->remote_amp, medp->local_amp),
medp->write_ch);
msg_reg = (void *)MSGBOX_MSG_REG(
medp->remote_amp, calculte_n(medp->remote_amp, medp->local_amp),
medp->write_ch);
while (readl(msg_sts) == MSGBOX_MAX_QUEUE);
writel(data, msg_reg);
}
u32 hal_msgbox_channel_send(struct msg_endpoint *medp, uint8_t *bf,
uint32_t len)
{
u32 data, i;
for (i = 0; i < len; i++) {
if (!(i % 4))
data = 0;
data |= *bf++ << ((i % 4) << 3);
if ((i % 4) == 3 || i == len - 1) {
msgbox_channel_send_data(medp, data);
}
}
return 0;
}
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