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// SPDX-License-Identifier: GPL-2.0-only
/*
* Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux
* (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net>
*
* Based in the radio Maestro PCI driver. Actually it uses the same chip
* for radio but different pci controller.
*
* I didn't have any specs I reversed engineered the protocol from
* the windows driver (radio.dll).
*
* The card uses the TEA5757 chip that includes a search function but it
* is useless as I haven't found any way to read back the frequency. If
* anybody does please mail me.
*
* For the pdf file see:
* http://www.nxp.com/acrobat_download2/expired_datasheets/TEA5757_5759_3.pdf
*
*
* CHANGES:
* 0.75b
* - better pci interface thanks to Francois Romieu <romieu@cogenit.fr>
*
* 0.75 Sun Feb 4 22:51:27 EET 2001
* - tiding up
* - removed support for multiple devices as it didn't work anyway
*
* BUGS:
* - card unmutes if you change frequency
*
* (c) 2006, 2007 by Mauro Carvalho Chehab <mchehab@kernel.org>:
* - Conversion to V4L2 API
* - Uses video_ioctl2 for parsing and to add debug support
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/videodev2.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <media/drv-intf/tea575x.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000.");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.0.0");
static int radio_nr = -1;
module_param(radio_nr, int, 0644);
MODULE_PARM_DESC(radio_nr, "Radio device number");
/* TEA5757 pin mappings */
static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16;
static atomic_t maxiradio_instance = ATOMIC_INIT(0);
#define PCI_VENDOR_ID_GUILLEMOT 0x5046
#define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
struct maxiradio
{
struct snd_tea575x tea;
struct v4l2_device v4l2_dev;
struct pci_dev *pdev;
u16 io; /* base of radio io */
};
static inline struct maxiradio *to_maxiradio(struct v4l2_device *v4l2_dev)
{
return container_of(v4l2_dev, struct maxiradio, v4l2_dev);
}
static void maxiradio_tea575x_set_pins(struct snd_tea575x *tea, u8 pins)
{
struct maxiradio *dev = tea->private_data;
u8 bits = 0;
bits |= (pins & TEA575X_DATA) ? data : 0;
bits |= (pins & TEA575X_CLK) ? clk : 0;
bits |= (pins & TEA575X_WREN) ? wren : 0;
bits |= power;
outb(bits, dev->io);
}
/* Note: this card cannot read out the data of the shift registers,
only the mono/stereo pin works. */
static u8 maxiradio_tea575x_get_pins(struct snd_tea575x *tea)
{
struct maxiradio *dev = tea->private_data;
u8 bits = inb(dev->io);
return ((bits & data) ? TEA575X_DATA : 0) |
((bits & mo_st) ? TEA575X_MOST : 0);
}
static void maxiradio_tea575x_set_direction(struct snd_tea575x *tea, bool output)
{
}
static const struct snd_tea575x_ops maxiradio_tea_ops = {
.set_pins = maxiradio_tea575x_set_pins,
.get_pins = maxiradio_tea575x_get_pins,
.set_direction = maxiradio_tea575x_set_direction,
};
static int maxiradio_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct maxiradio *dev;
struct v4l2_device *v4l2_dev;
int retval = -ENOMEM;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
dev_err(&pdev->dev, "not enough memory\n");
return -ENOMEM;
}
v4l2_dev = &dev->v4l2_dev;
v4l2_device_set_name(v4l2_dev, "maxiradio", &maxiradio_instance);
retval = v4l2_device_register(&pdev->dev, v4l2_dev);
if (retval < 0) {
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
goto errfr;
}
dev->tea.private_data = dev;
dev->tea.ops = &maxiradio_tea_ops;
/* The data pin cannot be read. This may be a hardware limitation, or
we just don't know how to read it. */
dev->tea.cannot_read_data = true;
dev->tea.v4l2_dev = v4l2_dev;
dev->tea.radio_nr = radio_nr;
strscpy(dev->tea.card, "Maxi Radio FM2000", sizeof(dev->tea.card));
snprintf(dev->tea.bus_info, sizeof(dev->tea.bus_info),
"PCI:%s", pci_name(pdev));
retval = -ENODEV;
if (!request_region(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0), v4l2_dev->name)) {
dev_err(&pdev->dev, "can't reserve I/O ports\n");
goto err_hdl;
}
if (pci_enable_device(pdev))
goto err_out_free_region;
dev->io = pci_resource_start(pdev, 0);
if (snd_tea575x_init(&dev->tea, THIS_MODULE)) {
printk(KERN_ERR "radio-maxiradio: Unable to detect TEA575x tuner\n");
goto err_out_free_region;
}
return 0;
err_out_free_region:
release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
err_hdl:
v4l2_device_unregister(v4l2_dev);
errfr:
kfree(dev);
return retval;
}
static void maxiradio_remove(struct pci_dev *pdev)
{
struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
struct maxiradio *dev = to_maxiradio(v4l2_dev);
snd_tea575x_exit(&dev->tea);
/* Turn off power */
outb(0, dev->io);
v4l2_device_unregister(v4l2_dev);
release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
kfree(dev);
}
static const struct pci_device_id maxiradio_pci_tbl[] = {
{ PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
PCI_ANY_ID, PCI_ANY_ID, },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
static struct pci_driver maxiradio_driver = {
.name = "radio-maxiradio",
.id_table = maxiradio_pci_tbl,
.probe = maxiradio_probe,
.remove = maxiradio_remove,
};
module_pci_driver(maxiradio_driver);
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