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linux/drivers/media/dvb-frontends/sp2.c

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 Based on 3 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version 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 this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] 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 this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-26 23:55:06 -07:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* CIMaX SP2/SP2HF (Atmel T90FJR) CI driver
*
* Copyright (C) 2014 Olli Salonen <olli.salonen@iki.fi>
*
* Heavily based on CIMax2(R) SP2 driver in conjunction with NetUp Dual
* DVB-S2 CI card (cimax2) with following copyrights:
*
* Copyright (C) 2009 NetUP Inc.
* Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
* Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
*/
#include "sp2_priv.h"
static int sp2_read_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)
{
int ret;
struct i2c_client *client = s->client;
struct i2c_adapter *adap = client->adapter;
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = 0,
.buf = &reg,
.len = 1
}, {
.addr = client->addr,
.flags = I2C_M_RD,
.buf = buf,
.len = len
}
};
ret = i2c_transfer(adap, msg, 2);
if (ret != 2) {
dev_err(&client->dev, "i2c read error, reg = 0x%02x, status = %d\n",
reg, ret);
if (ret < 0)
return ret;
else
return -EIO;
}
dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %02x\n",
client->addr, reg, buf[0]);
return 0;
}
static int sp2_write_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)
{
int ret;
u8 buffer[35];
struct i2c_client *client = s->client;
struct i2c_adapter *adap = client->adapter;
struct i2c_msg msg = {
.addr = client->addr,
.flags = 0,
.buf = &buffer[0],
.len = len + 1
};
if ((len + 1) > sizeof(buffer)) {
dev_err(&client->dev, "i2c wr reg=%02x: len=%d is too big!\n",
reg, len);
return -EINVAL;
}
buffer[0] = reg;
memcpy(&buffer[1], buf, len);
ret = i2c_transfer(adap, &msg, 1);
if (ret != 1) {
dev_err(&client->dev, "i2c write error, reg = 0x%02x, status = %d\n",
reg, ret);
if (ret < 0)
return ret;
else
return -EIO;
}
dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %*ph\n",
client->addr, reg, len, buf);
return 0;
}
static int sp2_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot, u8 acs,
u8 read, int addr, u8 data)
{
struct sp2 *s = en50221->data;
u8 store;
int mem, ret;
int (*ci_op_cam)(void*, u8, int, u8, int*) = s->ci_control;
if (slot != 0)
return -EINVAL;
/*
* change module access type between IO space and attribute memory
* when needed
*/
if (s->module_access_type != acs) {
ret = sp2_read_i2c(s, 0x00, &store, 1);
if (ret)
return ret;
store &= ~(SP2_MOD_CTL_ACS1 | SP2_MOD_CTL_ACS0);
store |= acs;
ret = sp2_write_i2c(s, 0x00, &store, 1);
if (ret)
return ret;
}
s->module_access_type = acs;
/* implementation of ci_op_cam is device specific */
if (ci_op_cam) {
ret = ci_op_cam(s->priv, read, addr, data, &mem);
} else {
dev_err(&s->client->dev, "callback not defined");
return -EINVAL;
}
if (ret)
return ret;
dev_dbg(&s->client->dev, "%s: slot=%d, addr=0x%04x, %s, data=%x",
(read) ? "read" : "write", slot, addr,
(acs == SP2_CI_ATTR_ACS) ? "attr" : "io",
(read) ? mem : data);
if (read)
return mem;
else
return 0;
}
int sp2_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
int slot, int addr)
{
return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
SP2_CI_RD, addr, 0);
}
int sp2_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
int slot, int addr, u8 data)
{
return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
SP2_CI_WR, addr, data);
}
int sp2_ci_read_cam_control(struct dvb_ca_en50221 *en50221,
int slot, u8 addr)
{
return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
SP2_CI_RD, addr, 0);
}
int sp2_ci_write_cam_control(struct dvb_ca_en50221 *en50221,
int slot, u8 addr, u8 data)
{
return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
SP2_CI_WR, addr, data);
}
int sp2_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
{
struct sp2 *s = en50221->data;
u8 buf;
int ret;
dev_dbg(&s->client->dev, "slot: %d\n", slot);
if (slot != 0)
return -EINVAL;
/* RST on */
buf = SP2_MOD_CTL_RST;
ret = sp2_write_i2c(s, 0x00, &buf, 1);
if (ret)
return ret;
usleep_range(500, 600);
/* RST off */
buf = 0x00;
ret = sp2_write_i2c(s, 0x00, &buf, 1);
if (ret)
return ret;
msleep(1000);
return 0;
}
int sp2_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
{
struct sp2 *s = en50221->data;
dev_dbg(&s->client->dev, "slot:%d\n", slot);
/* not implemented */
return 0;
}
int sp2_ci_slot_ts_enable(struct dvb_ca_en50221 *en50221, int slot)
{
struct sp2 *s = en50221->data;
u8 buf;
dev_dbg(&s->client->dev, "slot:%d\n", slot);
if (slot != 0)
return -EINVAL;
sp2_read_i2c(s, 0x00, &buf, 1);
/* disable bypass and enable TS */
buf |= (SP2_MOD_CTL_TSOEN | SP2_MOD_CTL_TSIEN);
return sp2_write_i2c(s, 0, &buf, 1);
}
int sp2_ci_poll_slot_status(struct dvb_ca_en50221 *en50221,
int slot, int open)
{
struct sp2 *s = en50221->data;
u8 buf[2];
int ret;
dev_dbg(&s->client->dev, "slot:%d open:%d\n", slot, open);
/*
* CAM module INSERT/REMOVE processing. Slow operation because of i2c
* transfers. Throttle read to one per sec.
*/
if (time_after(jiffies, s->next_status_checked_time)) {
ret = sp2_read_i2c(s, 0x00, buf, 1);
s->next_status_checked_time = jiffies + msecs_to_jiffies(1000);
if (ret)
return 0;
if (buf[0] & SP2_MOD_CTL_DET)
s->status = DVB_CA_EN50221_POLL_CAM_PRESENT |
DVB_CA_EN50221_POLL_CAM_READY;
else
s->status = 0;
}
return s->status;
}
static int sp2_init(struct sp2 *s)
{
int ret = 0;
u8 buf;
u8 cimax_init[34] = {
0x00, /* module A control*/
0x00, /* auto select mask high A */
0x00, /* auto select mask low A */
0x00, /* auto select pattern high A */
0x00, /* auto select pattern low A */
0x44, /* memory access time A, 600 ns */
0x00, /* invert input A */
0x00, /* RFU */
0x00, /* RFU */
0x00, /* module B control*/
0x00, /* auto select mask high B */
0x00, /* auto select mask low B */
0x00, /* auto select pattern high B */
0x00, /* auto select pattern low B */
0x44, /* memory access time B, 600 ns */
0x00, /* invert input B */
0x00, /* RFU */
0x00, /* RFU */
0x00, /* auto select mask high Ext */
0x00, /* auto select mask low Ext */
0x00, /* auto select pattern high Ext */
0x00, /* auto select pattern low Ext */
0x00, /* RFU */
0x02, /* destination - module A */
0x01, /* power control reg, VCC power on */
0x00, /* RFU */
0x00, /* int status read only */
0x00, /* Interrupt Mask Register */
0x05, /* EXTINT=active-high, INT=push-pull */
0x00, /* USCG1 */
0x04, /* ack active low */
0x00, /* LOCK = 0 */
0x22, /* unknown */
0x00, /* synchronization? */
};
dev_dbg(&s->client->dev, "\n");
s->ca.owner = THIS_MODULE;
s->ca.read_attribute_mem = sp2_ci_read_attribute_mem;
s->ca.write_attribute_mem = sp2_ci_write_attribute_mem;
s->ca.read_cam_control = sp2_ci_read_cam_control;
s->ca.write_cam_control = sp2_ci_write_cam_control;
s->ca.slot_reset = sp2_ci_slot_reset;
s->ca.slot_shutdown = sp2_ci_slot_shutdown;
s->ca.slot_ts_enable = sp2_ci_slot_ts_enable;
s->ca.poll_slot_status = sp2_ci_poll_slot_status;
s->ca.data = s;
s->module_access_type = 0;
/* initialize all regs */
ret = sp2_write_i2c(s, 0x00, &cimax_init[0], 34);
if (ret)
goto err;
/* lock registers */
buf = 1;
ret = sp2_write_i2c(s, 0x1f, &buf, 1);
if (ret)
goto err;
/* power on slots */
ret = sp2_write_i2c(s, 0x18, &buf, 1);
if (ret)
goto err;
ret = dvb_ca_en50221_init(s->dvb_adap, &s->ca, 0, 1);
if (ret)
goto err;
return 0;
err:
dev_dbg(&s->client->dev, "init failed=%d\n", ret);
return ret;
}
static int sp2_exit(struct i2c_client *client)
{
struct sp2 *s;
dev_dbg(&client->dev, "\n");
if (!client)
return 0;
s = i2c_get_clientdata(client);
if (!s)
return 0;
if (!s->ca.data)
return 0;
dvb_ca_en50221_release(&s->ca);
return 0;
}
static int sp2_probe(struct i2c_client *client)
{
struct sp2_config *cfg = client->dev.platform_data;
struct sp2 *s;
int ret;
dev_dbg(&client->dev, "\n");
s = kzalloc(sizeof(*s), GFP_KERNEL);
if (!s) {
ret = -ENOMEM;
goto err;
}
s->client = client;
s->dvb_adap = cfg->dvb_adap;
s->priv = cfg->priv;
s->ci_control = cfg->ci_control;
i2c_set_clientdata(client, s);
ret = sp2_init(s);
if (ret)
goto err;
dev_info(&s->client->dev, "CIMaX SP2 successfully attached\n");
return 0;
err:
dev_dbg(&client->dev, "init failed=%d\n", ret);
kfree(s);
return ret;
}
i2c: Make remove callback return void The value returned by an i2c driver's remove function is mostly ignored. (Only an error message is printed if the value is non-zero that the error is ignored.) So change the prototype of the remove function to return no value. This way driver authors are not tempted to assume that passing an error to the upper layer is a good idea. All drivers are adapted accordingly. There is no intended change of behaviour, all callbacks were prepared to return 0 before. Reviewed-by: Peter Senna Tschudin <peter.senna@gmail.com> Reviewed-by: Jeremy Kerr <jk@codeconstruct.com.au> Reviewed-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Crt Mori <cmo@melexis.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Marek Behún <kabel@kernel.org> # for leds-turris-omnia Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Petr Machata <petrm@nvidia.com> # for mlxsw Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com> # for surface3_power Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> # for bmc150-accel-i2c + kxcjk-1013 Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> # for media/* + staging/media/* Acked-by: Miguel Ojeda <ojeda@kernel.org> # for auxdisplay/ht16k33 + auxdisplay/lcd2s Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # for versaclock5 Reviewed-by: Ajay Gupta <ajayg@nvidia.com> # for ucsi_ccg Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # for iio Acked-by: Peter Rosin <peda@axentia.se> # for i2c-mux-*, max9860 Acked-by: Adrien Grassein <adrien.grassein@gmail.com> # for lontium-lt8912b Reviewed-by: Jean Delvare <jdelvare@suse.de> # for hwmon, i2c-core and i2c/muxes Acked-by: Corey Minyard <cminyard@mvista.com> # for IPMI Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> # for drivers/power Acked-by: Krzysztof Hałasa <khalasa@piap.pl> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-15 01:02:30 -07:00
static void sp2_remove(struct i2c_client *client)
{
struct sp2 *s = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
sp2_exit(client);
kfree(s);
}
static const struct i2c_device_id sp2_id[] = {
{ "sp2" },
{}
};
MODULE_DEVICE_TABLE(i2c, sp2_id);
static struct i2c_driver sp2_driver = {
.driver = {
.name = "sp2",
},
.probe = sp2_probe,
.remove = sp2_remove,
.id_table = sp2_id,
};
module_i2c_driver(sp2_driver);
MODULE_DESCRIPTION("CIMaX SP2/HF CI driver");
MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>");
MODULE_LICENSE("GPL");