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// SPDX-License-Identifier: GPL-2.0
/*
* ddbridge-mci.c: Digital Devices microcode interface
*
* Copyright (C) 2017-2018 Digital Devices GmbH
* Ralph Metzler <rjkm@metzlerbros.de>
* Marcus Metzler <mocm@metzlerbros.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "ddbridge.h"
#include "ddbridge-io.h"
#include "ddbridge-mci.h"
static LIST_HEAD(mci_list);
static int mci_reset(struct mci *state)
{
struct ddb_link *link = state->base->link;
u32 status = 0;
u32 timeout = 40;
ddblwritel(link, MCI_CONTROL_RESET, MCI_CONTROL);
ddblwritel(link, 0, MCI_CONTROL + 4); /* 1= no internal init */
msleep(300);
ddblwritel(link, 0, MCI_CONTROL);
while (1) {
status = ddblreadl(link, MCI_CONTROL);
if ((status & MCI_CONTROL_READY) == MCI_CONTROL_READY)
break;
if (--timeout == 0)
break;
msleep(50);
}
if ((status & MCI_CONTROL_READY) == 0)
return -1;
if (link->ids.device == 0x0009)
ddblwritel(link, SX8_TSCONFIG_MODE_NORMAL, SX8_TSCONFIG);
return 0;
}
int ddb_mci_config(struct mci *state, u32 config)
{
struct ddb_link *link = state->base->link;
if (link->ids.device != 0x0009)
return -EINVAL;
ddblwritel(link, config, SX8_TSCONFIG);
return 0;
}
static int _mci_cmd_unlocked(struct mci *state,
u32 *cmd, u32 cmd_len,
u32 *res, u32 res_len)
{
struct ddb_link *link = state->base->link;
u32 i, val;
unsigned long stat;
val = ddblreadl(link, MCI_CONTROL);
if (val & (MCI_CONTROL_RESET | MCI_CONTROL_START_COMMAND))
return -EIO;
if (cmd && cmd_len)
for (i = 0; i < cmd_len; i++)
ddblwritel(link, cmd[i], MCI_COMMAND + i * 4);
val |= (MCI_CONTROL_START_COMMAND | MCI_CONTROL_ENABLE_DONE_INTERRUPT);
ddblwritel(link, val, MCI_CONTROL);
stat = wait_for_completion_timeout(&state->base->completion, HZ);
if (stat == 0) {
dev_warn(state->base->dev, "MCI-%d: MCI timeout\n", state->nr);
return -EIO;
}
if (res && res_len)
for (i = 0; i < res_len; i++)
res[i] = ddblreadl(link, MCI_RESULT + i * 4);
return 0;
}
int ddb_mci_cmd(struct mci *state,
struct mci_command *command,
struct mci_result *result)
{
int stat;
mutex_lock(&state->base->mci_lock);
stat = _mci_cmd_unlocked(state,
(u32 *)command, sizeof(*command) / sizeof(u32),
(u32 *)result, sizeof(*result) / sizeof(u32));
mutex_unlock(&state->base->mci_lock);
return stat;
}
static void mci_handler(void *priv)
{
struct mci_base *base = (struct mci_base *)priv;
complete(&base->completion);
}
static struct mci_base *match_base(void *key)
{
struct mci_base *p;
list_for_each_entry(p, &mci_list, mci_list)
if (p->key == key)
return p;
return NULL;
}
static int probe(struct mci *state)
{
mci_reset(state);
return 0;
}
struct dvb_frontend
*ddb_mci_attach(struct ddb_input *input, struct mci_cfg *cfg, int nr,
int (**fn_set_input)(struct dvb_frontend *fe, int input))
{
struct ddb_port *port = input->port;
struct ddb *dev = port->dev;
struct ddb_link *link = &dev->link[port->lnr];
struct mci_base *base;
struct mci *state;
void *key = cfg->type ? (void *)port : (void *)link;
state = kzalloc(cfg->state_size, GFP_KERNEL);
if (!state)
return NULL;
base = match_base(key);
if (base) {
base->count++;
state->base = base;
} else {
base = kzalloc(cfg->base_size, GFP_KERNEL);
if (!base)
goto fail;
base->key = key;
base->count = 1;
base->link = link;
base->dev = dev->dev;
mutex_init(&base->mci_lock);
mutex_init(&base->tuner_lock);
ddb_irq_set(dev, link->nr, 0, mci_handler, base);
init_completion(&base->completion);
state->base = base;
if (probe(state) < 0) {
kfree(base);
goto fail;
}
list_add(&base->mci_list, &mci_list);
if (cfg->base_init)
cfg->base_init(base);
}
memcpy(&state->fe.ops, cfg->fe_ops, sizeof(struct dvb_frontend_ops));
state->fe.demodulator_priv = state;
state->nr = nr;
*fn_set_input = cfg->set_input;
state->tuner = nr;
state->demod = nr;
if (cfg->init)
cfg->init(state);
return &state->fe;
fail:
kfree(state);
return NULL;
}
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