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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux4 * (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net>5 *6 * Based in the radio Maestro PCI driver. Actually it uses the same chip7 * for radio but different pci controller.8 *9 * I didn't have any specs I reversed engineered the protocol from10 * the windows driver (radio.dll).11 *12 * The card uses the TEA5757 chip that includes a search function but it13 * is useless as I haven't found any way to read back the frequency. If14 * anybody does please mail me.15 *16 * For the pdf file see:17 * http://www.nxp.com/acrobat_download2/expired_datasheets/TEA5757_5759_3.pdf18 *19 *20 * CHANGES:21 * 0.75b22 * - better pci interface thanks to Francois Romieu <romieu@cogenit.fr>23 *24 * 0.75 Sun Feb 4 22:51:27 EET 200125 * - tiding up26 * - removed support for multiple devices as it didn't work anyway27 *28 * BUGS:29 * - card unmutes if you change frequency30 *31 * (c) 2006, 2007 by Mauro Carvalho Chehab <mchehab@kernel.org>:32 * - Conversion to V4L2 API33 * - Uses video_ioctl2 for parsing and to add debug support34 */35 36 37#include <linux/module.h>38#include <linux/init.h>39#include <linux/ioport.h>40#include <linux/delay.h>41#include <linux/mutex.h>42#include <linux/pci.h>43#include <linux/videodev2.h>44#include <linux/io.h>45#include <linux/slab.h>46#include <media/drv-intf/tea575x.h>47#include <media/v4l2-device.h>48#include <media/v4l2-ioctl.h>49#include <media/v4l2-fh.h>50#include <media/v4l2-ctrls.h>51#include <media/v4l2-event.h>52 53MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");54MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000.");55MODULE_LICENSE("GPL");56MODULE_VERSION("1.0.0");57 58static int radio_nr = -1;59module_param(radio_nr, int, 0644);60MODULE_PARM_DESC(radio_nr, "Radio device number");61 62/* TEA5757 pin mappings */63static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16;64 65static atomic_t maxiradio_instance = ATOMIC_INIT(0);66 67#define PCI_VENDOR_ID_GUILLEMOT 0x504668#define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x100169 70struct maxiradio71{72 struct snd_tea575x tea;73 struct v4l2_device v4l2_dev;74 struct pci_dev *pdev;75 76 u16 io; /* base of radio io */77};78 79static inline struct maxiradio *to_maxiradio(struct v4l2_device *v4l2_dev)80{81 return container_of(v4l2_dev, struct maxiradio, v4l2_dev);82}83 84static void maxiradio_tea575x_set_pins(struct snd_tea575x *tea, u8 pins)85{86 struct maxiradio *dev = tea->private_data;87 u8 bits = 0;88 89 bits |= (pins & TEA575X_DATA) ? data : 0;90 bits |= (pins & TEA575X_CLK) ? clk : 0;91 bits |= (pins & TEA575X_WREN) ? wren : 0;92 bits |= power;93 94 outb(bits, dev->io);95}96 97/* Note: this card cannot read out the data of the shift registers,98 only the mono/stereo pin works. */99static u8 maxiradio_tea575x_get_pins(struct snd_tea575x *tea)100{101 struct maxiradio *dev = tea->private_data;102 u8 bits = inb(dev->io);103 104 return ((bits & data) ? TEA575X_DATA : 0) |105 ((bits & mo_st) ? TEA575X_MOST : 0);106}107 108static void maxiradio_tea575x_set_direction(struct snd_tea575x *tea, bool output)109{110}111 112static const struct snd_tea575x_ops maxiradio_tea_ops = {113 .set_pins = maxiradio_tea575x_set_pins,114 .get_pins = maxiradio_tea575x_get_pins,115 .set_direction = maxiradio_tea575x_set_direction,116};117 118static int maxiradio_probe(struct pci_dev *pdev,119 const struct pci_device_id *ent)120{121 struct maxiradio *dev;122 struct v4l2_device *v4l2_dev;123 int retval = -ENOMEM;124 125 dev = kzalloc(sizeof(*dev), GFP_KERNEL);126 if (dev == NULL) {127 dev_err(&pdev->dev, "not enough memory\n");128 return -ENOMEM;129 }130 131 v4l2_dev = &dev->v4l2_dev;132 v4l2_device_set_name(v4l2_dev, "maxiradio", &maxiradio_instance);133 134 retval = v4l2_device_register(&pdev->dev, v4l2_dev);135 if (retval < 0) {136 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");137 goto errfr;138 }139 dev->tea.private_data = dev;140 dev->tea.ops = &maxiradio_tea_ops;141 /* The data pin cannot be read. This may be a hardware limitation, or142 we just don't know how to read it. */143 dev->tea.cannot_read_data = true;144 dev->tea.v4l2_dev = v4l2_dev;145 dev->tea.radio_nr = radio_nr;146 strscpy(dev->tea.card, "Maxi Radio FM2000", sizeof(dev->tea.card));147 148 retval = -ENODEV;149 150 if (!request_region(pci_resource_start(pdev, 0),151 pci_resource_len(pdev, 0), v4l2_dev->name)) {152 dev_err(&pdev->dev, "can't reserve I/O ports\n");153 goto err_hdl;154 }155 156 if (pci_enable_device(pdev))157 goto err_out_free_region;158 159 dev->io = pci_resource_start(pdev, 0);160 if (snd_tea575x_init(&dev->tea, THIS_MODULE)) {161 printk(KERN_ERR "radio-maxiradio: Unable to detect TEA575x tuner\n");162 goto err_out_free_region;163 }164 return 0;165 166err_out_free_region:167 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));168err_hdl:169 v4l2_device_unregister(v4l2_dev);170errfr:171 kfree(dev);172 return retval;173}174 175static void maxiradio_remove(struct pci_dev *pdev)176{177 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);178 struct maxiradio *dev = to_maxiradio(v4l2_dev);179 180 snd_tea575x_exit(&dev->tea);181 /* Turn off power */182 outb(0, dev->io);183 v4l2_device_unregister(v4l2_dev);184 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));185 kfree(dev);186}187 188static const struct pci_device_id maxiradio_pci_tbl[] = {189 { PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,190 PCI_ANY_ID, PCI_ANY_ID, },191 { 0 }192};193 194MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);195 196static struct pci_driver maxiradio_driver = {197 .name = "radio-maxiradio",198 .id_table = maxiradio_pci_tbl,199 .probe = maxiradio_probe,200 .remove = maxiradio_remove,201};202 203module_pci_driver(maxiradio_driver);204