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/* SPDX-License-Identifier: MIT */
#include "dcp_iboot.h"
#include "afk.h"
#include "assert.h"
#include "malloc.h"
#include "string.h"
#include "utils.h"
#define DCP_IBOOT_ENDPOINT 0x23
#define TXBUF_LEN 0x4000
#define RXBUF_LEN 0x4000
struct txcmd {
u32 op;
u32 len;
u32 unk1;
u32 unk2;
u8 payload[];
};
struct rxcmd {
u32 op;
u32 len;
u8 payload[];
};
struct dcp_iboot_if {
dcp_dev_t *dcp;
afk_epic_ep_t *epic;
int channel;
union {
u8 txbuf[TXBUF_LEN];
struct txcmd txcmd;
};
union {
u8 rxbuf[RXBUF_LEN];
struct rxcmd rxcmd;
};
};
enum IBootCmd {
IBOOT_SET_POWER = 2,
IBOOT_GET_HPD = 3,
IBOOT_GET_TIMING_MODES = 4,
IBOOT_GET_COLOR_MODES = 5,
IBOOT_SET_MODE = 6,
IBOOT_SWAP_BEGIN = 15,
IBOOT_SWAP_SET_LAYER = 16,
IBOOT_SWAP_END = 18,
};
struct get_hpd_resp {
u8 hpd;
u8 pad[3];
u32 timing_cnt;
u32 color_cnt;
};
struct get_tmode_resp {
u32 count;
dcp_timing_mode_t modes[];
};
struct get_cmode_resp {
u32 count;
dcp_color_mode_t modes[];
};
struct swap_start_resp {
u32 unk1, unk2, unk3;
u32 swap_id;
u32 unk4;
};
struct swap_set_layer_cmd {
u32 unk;
u32 layer_id;
dcp_layer_t layer;
dcp_rect_t src;
dcp_rect_t dst;
u32 unk2;
} PACKED;
dcp_iboot_if_t *dcp_ib_init(dcp_dev_t *dcp)
{
dcp_iboot_if_t *iboot = malloc(sizeof(dcp_iboot_if_t));
if (!iboot)
return NULL;
iboot->dcp = dcp;
iboot->epic = afk_epic_init(dcp->rtkit, DCP_IBOOT_ENDPOINT);
if (!iboot->epic) {
printf("dcp-iboot: failed to initialize EPIC\n");
goto err_free;
}
iboot->channel = afk_epic_start_interface(iboot->epic, "disp0-service", TXBUF_LEN, RXBUF_LEN);
if (iboot->channel < 0) {
printf("dcp-iboot: failed to initialize disp0 service\n");
goto err_shutdown;
}
return iboot;
err_shutdown:
afk_epic_shutdown(iboot->epic);
err_free:
free(iboot);
return NULL;
}
int dcp_ib_shutdown(dcp_iboot_if_t *iboot)
{
afk_epic_shutdown(iboot->epic);
free(iboot);
return 0;
}
static int dcp_ib_cmd(dcp_iboot_if_t *iboot, int op, size_t in_size)
{
size_t rxsize = RXBUF_LEN;
assert(in_size <= TXBUF_LEN - sizeof(struct txcmd));
iboot->txcmd.op = op;
iboot->txcmd.len = sizeof(struct txcmd) + in_size;
return afk_epic_command(iboot->epic, iboot->channel, 0xc0, iboot->txbuf,
sizeof(struct txcmd) + in_size, iboot->rxbuf, &rxsize);
}
int dcp_ib_set_power(dcp_iboot_if_t *iboot, bool power)
{
u32 *pwr = (void *)iboot->txcmd.payload;
*pwr = power;
return dcp_ib_cmd(iboot, IBOOT_SET_POWER, 1);
}
int dcp_ib_get_hpd(dcp_iboot_if_t *iboot, int *timing_cnt, int *color_cnt)
{
struct get_hpd_resp *resp = (void *)iboot->rxcmd.payload;
int ret = dcp_ib_cmd(iboot, IBOOT_GET_HPD, 0);
if (ret < 0)
return ret;
if (timing_cnt)
*timing_cnt = resp->timing_cnt;
if (color_cnt)
*color_cnt = resp->color_cnt;
return !!resp->hpd;
}
int dcp_ib_get_timing_modes(dcp_iboot_if_t *iboot, dcp_timing_mode_t **modes)
{
struct get_tmode_resp *resp = (void *)iboot->rxcmd.payload;
int ret = dcp_ib_cmd(iboot, IBOOT_GET_TIMING_MODES, 0);
if (ret < 0)
return ret;
*modes = resp->modes;
return resp->count;
}
int dcp_ib_get_color_modes(dcp_iboot_if_t *iboot, dcp_color_mode_t **modes)
{
struct get_cmode_resp *resp = (void *)iboot->rxcmd.payload;
int ret = dcp_ib_cmd(iboot, IBOOT_GET_COLOR_MODES, 0);
if (ret < 0)
return ret;
*modes = resp->modes;
return resp->count;
}
int dcp_ib_set_mode(dcp_iboot_if_t *iboot, dcp_timing_mode_t *tmode, dcp_color_mode_t *cmode)
{
struct {
dcp_timing_mode_t tmode;
dcp_color_mode_t cmode;
} *cmd = (void *)iboot->txcmd.payload;
cmd->tmode = *tmode;
cmd->cmode = *cmode;
return dcp_ib_cmd(iboot, IBOOT_SET_MODE, sizeof(*cmd));
}
int dcp_ib_swap_begin(dcp_iboot_if_t *iboot)
{
struct swap_start_resp *resp = (void *)iboot->rxcmd.payload;
int ret = dcp_ib_cmd(iboot, IBOOT_SWAP_BEGIN, 0);
if (ret < 0)
return ret;
return resp->swap_id;
}
int dcp_ib_swap_set_layer(dcp_iboot_if_t *iboot, int layer_id, dcp_layer_t *layer,
dcp_rect_t *src_rect, dcp_rect_t *dst_rect)
{
struct swap_set_layer_cmd *cmd = (void *)iboot->txcmd.payload;
memset(cmd, 0, sizeof(*cmd));
cmd->layer_id = layer_id;
cmd->layer = *layer;
cmd->src = *src_rect;
cmd->dst = *dst_rect;
return dcp_ib_cmd(iboot, IBOOT_SWAP_SET_LAYER, sizeof(*cmd));
}
int dcp_ib_swap_end(dcp_iboot_if_t *iboot)
{
memset(iboot->txcmd.payload, 0, 12);
return dcp_ib_cmd(iboot, IBOOT_SWAP_END, 12);
}
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