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dddvb/ddbridge/ddbridge-mci.c
Ralph Metzler 9d8c7d4a63 - separate MCI and SX8 code
- move SX8 code to ddbridge-sx8.c
- adjust SX8 code to latest version from upstream
- add file with skeleton driver for M4
2018-05-15 23:01:39 +02:00

225 lines
5.3 KiB
C

/*
* 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.
*
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, point your browser to
* http://www.gnu.org/copyleft/gpl.html
*/
#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 ddb_mci_cmd_raw_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) {
printk("MCI timeout\n");
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_unlocked(struct mci *state,
struct mci_command *command,
struct mci_result *result)
{
u32 *cmd = (u32 *) command;
u32 *res = (u32 *) result;
return ddb_mci_cmd_raw_unlocked(state, cmd, sizeof(*command)/sizeof(u32),
res, sizeof(*result)/sizeof(u32));
}
int ddb_mci_cmd(struct mci *state,
struct mci_command *command,
struct mci_result *result)
{
int stat;
mutex_lock(&state->base->mci_lock);
stat = ddb_mci_cmd_raw_unlocked(state,
(u32 *)command, sizeof(*command)/sizeof(u32),
(u32 *)result, sizeof(*result)/sizeof(u32));
mutex_unlock(&state->base->mci_lock);
return stat;
}
int ddb_mci_cmd_raw(struct mci *state,
struct mci_command *command, u32 command_len,
struct mci_result *result, u32 result_len)
{
int stat;
mutex_lock(&state->base->mci_lock);
stat = ddb_mci_cmd_raw_unlocked(state,
(u32 *)command, command_len,
(u32 *)result, result_len);
mutex_unlock(&state->base->mci_lock);
return stat;
}
static int ddb_mci_get_iq(struct mci *mci, u32 demod, s16 *i, s16 *q)
{
int stat;
struct mci_command cmd;
struct mci_result res;
memset(&cmd, 0, sizeof(cmd));
memset(&res, 0, sizeof(res));
cmd.command = MCI_CMD_GET_IQSYMBOL;
cmd.demod = demod;
stat = ddb_mci_cmd(mci, &cmd, &res);
if (!stat) {
*i = res.iq_symbol.i;
*q = res.iq_symbol.q;
}
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)
{
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;
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;
state->tuner = nr;
state->demod = nr;
if (cfg->init)
cfg->init(state);
return &state->fe;
fail:
kfree(state);
return NULL;
}