--- /dev/null
+/*
+ * Driver for Midiman Portman2x4 parallel port midi interface
+ *
+ * Copyright (c) by Levent Guendogdu <levon@feature-it.com>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * ChangeLog
+ * Jan 24 2007 Matthias Koenig <mkoenig@suse.de>
+ * - cleanup and rewrite
+ * Sep 30 2004 Tobias Gehrig <tobias@gehrig.tk>
+ * - source code cleanup
+ * Sep 03 2004 Tobias Gehrig <tobias@gehrig.tk>
+ * - fixed compilation problem with alsa 1.0.6a (removed MODULE_CLASSES,
+ * MODULE_PARM_SYNTAX and changed MODULE_DEVICES to
+ * MODULE_SUPPORTED_DEVICE)
+ * Mar 24 2004 Tobias Gehrig <tobias@gehrig.tk>
+ * - added 2.6 kernel support
+ * Mar 18 2004 Tobias Gehrig <tobias@gehrig.tk>
+ * - added parport_unregister_driver to the startup routine if the driver fails to detect a portman
+ * - added support for all 4 output ports in portman_putmidi
+ * Mar 17 2004 Tobias Gehrig <tobias@gehrig.tk>
+ * - added checks for opened input device in interrupt handler
+ * Feb 20 2004 Tobias Gehrig <tobias@gehrig.tk>
+ * - ported from alsa 0.5 to 1.0
+ */
+
+#include <sound/driver.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/parport.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/rawmidi.h>
+#include <sound/control.h>
+
+#define CARD_NAME "Portman 2x4"
+#define DRIVER_NAME "portman"
+#define PLATFORM_DRIVER "snd_portman2x4"
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
+
+static struct platform_device *platform_devices[SNDRV_CARDS];
+static int device_count;
+
+module_param_array(index, int, NULL, S_IRUGO);
+MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
+module_param_array(id, charp, NULL, S_IRUGO);
+MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
+module_param_array(enable, bool, NULL, S_IRUGO);
+MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
+
+MODULE_AUTHOR("Levent Guendogdu, Tobias Gehrig, Matthias Koenig");
+MODULE_DESCRIPTION("Midiman Portman2x4");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{Midiman,Portman2x4}}");
+
+/*********************************************************************
+ * Chip specific
+ *********************************************************************/
+#define PORTMAN_NUM_INPUT_PORTS 2
+#define PORTMAN_NUM_OUTPUT_PORTS 4
+
+struct portman {
+ spinlock_t reg_lock;
+ struct snd_card *card;
+ struct snd_rawmidi *rmidi;
+ struct pardevice *pardev;
+ int pardev_claimed;
+
+ int open_count;
+ int mode[PORTMAN_NUM_INPUT_PORTS];
+ struct snd_rawmidi_substream *midi_input[PORTMAN_NUM_INPUT_PORTS];
+};
+
+static int portman_free(struct portman *pm)
+{
+ kfree(pm);
+ return 0;
+}
+
+static int __devinit portman_create(struct snd_card *card,
+ struct pardevice *pardev,
+ struct portman **rchip)
+{
+ struct portman *pm;
+
+ *rchip = NULL;
+
+ pm = kzalloc(sizeof(struct portman), GFP_KERNEL);
+ if (pm == NULL)
+ return -ENOMEM;
+
+ /* Init chip specific data */
+ spin_lock_init(&pm->reg_lock);
+ pm->card = card;
+ pm->pardev = pardev;
+
+ *rchip = pm;
+
+ return 0;
+}
+
+/*********************************************************************
+ * HW related constants
+ *********************************************************************/
+
+/* Standard PC parallel port status register equates. */
+#define PP_STAT_BSY 0x80 /* Busy status. Inverted. */
+#define PP_STAT_ACK 0x40 /* Acknowledge. Non-Inverted. */
+#define PP_STAT_POUT 0x20 /* Paper Out. Non-Inverted. */
+#define PP_STAT_SEL 0x10 /* Select. Non-Inverted. */
+#define PP_STAT_ERR 0x08 /* Error. Non-Inverted. */
+
+/* Standard PC parallel port command register equates. */
+#define PP_CMD_IEN 0x10 /* IRQ Enable. Non-Inverted. */
+#define PP_CMD_SELI 0x08 /* Select Input. Inverted. */
+#define PP_CMD_INIT 0x04 /* Init Printer. Non-Inverted. */
+#define PP_CMD_FEED 0x02 /* Auto Feed. Inverted. */
+#define PP_CMD_STB 0x01 /* Strobe. Inverted. */
+
+/* Parallel Port Command Register as implemented by PCP2x4. */
+#define INT_EN PP_CMD_IEN /* Interrupt enable. */
+#define STROBE PP_CMD_STB /* Command strobe. */
+
+/* The parallel port command register field (b1..b3) selects the
+ * various "registers" within the PC/P 2x4. These are the internal
+ * address of these "registers" that must be written to the parallel
+ * port command register.
+ */
+#define RXDATA0 (0 << 1) /* PCP RxData channel 0. */
+#define RXDATA1 (1 << 1) /* PCP RxData channel 1. */
+#define GEN_CTL (2 << 1) /* PCP General Control Register. */
+#define SYNC_CTL (3 << 1) /* PCP Sync Control Register. */
+#define TXDATA0 (4 << 1) /* PCP TxData channel 0. */
+#define TXDATA1 (5 << 1) /* PCP TxData channel 1. */
+#define TXDATA2 (6 << 1) /* PCP TxData channel 2. */
+#define TXDATA3 (7 << 1) /* PCP TxData channel 3. */
+
+/* Parallel Port Status Register as implemented by PCP2x4. */
+#define ESTB PP_STAT_POUT /* Echoed strobe. */
+#define INT_REQ PP_STAT_ACK /* Input data int request. */
+#define BUSY PP_STAT_ERR /* Interface Busy. */
+
+/* Parallel Port Status Register BUSY and SELECT lines are multiplexed
+ * between several functions. Depending on which 2x4 "register" is
+ * currently selected (b1..b3), the BUSY and SELECT lines are
+ * assigned as follows:
+ *
+ * SELECT LINE: A3 A2 A1
+ * --------
+ */
+#define RXAVAIL PP_STAT_SEL /* Rx Available, channel 0. 0 0 0 */
+// RXAVAIL1 PP_STAT_SEL /* Rx Available, channel 1. 0 0 1 */
+#define SYNC_STAT PP_STAT_SEL /* Reserved - Sync Status. 0 1 0 */
+// /* Reserved. 0 1 1 */
+#define TXEMPTY PP_STAT_SEL /* Tx Empty, channel 0. 1 0 0 */
+// TXEMPTY1 PP_STAT_SEL /* Tx Empty, channel 1. 1 0 1 */
+// TXEMPTY2 PP_STAT_SEL /* Tx Empty, channel 2. 1 1 0 */
+// TXEMPTY3 PP_STAT_SEL /* Tx Empty, channel 3. 1 1 1 */
+
+/* BUSY LINE: A3 A2 A1
+ * --------
+ */
+#define RXDATA PP_STAT_BSY /* Rx Input Data, channel 0. 0 0 0 */
+// RXDATA1 PP_STAT_BSY /* Rx Input Data, channel 1. 0 0 1 */
+#define SYNC_DATA PP_STAT_BSY /* Reserved - Sync Data. 0 1 0 */
+ /* Reserved. 0 1 1 */
+#define DATA_ECHO PP_STAT_BSY /* Parallel Port Data Echo. 1 0 0 */
+#define A0_ECHO PP_STAT_BSY /* Address 0 Echo. 1 0 1 */
+#define A1_ECHO PP_STAT_BSY /* Address 1 Echo. 1 1 0 */
+#define A2_ECHO PP_STAT_BSY /* Address 2 Echo. 1 1 1 */
+
+#define PORTMAN2X4_MODE_INPUT_TRIGGERED 0x01
+
+/*********************************************************************
+ * Hardware specific functions
+ *********************************************************************/
+static inline void portman_write_command(struct portman *pm, u8 value)
+{
+ parport_write_control(pm->pardev->port, value);
+}
+
+static inline u8 portman_read_command(struct portman *pm)
+{
+ return parport_read_control(pm->pardev->port);
+}
+
+static inline u8 portman_read_status(struct portman *pm)
+{
+ return parport_read_status(pm->pardev->port);
+}
+
+static inline u8 portman_read_data(struct portman *pm)
+{
+ return parport_read_data(pm->pardev->port);
+}
+
+static inline void portman_write_data(struct portman *pm, u8 value)
+{
+ parport_write_data(pm->pardev->port, value);
+}
+
+static void portman_write_midi(struct portman *pm,
+ int port, u8 mididata)
+{
+ int command = ((port + 4) << 1);
+
+ /* Get entering data byte and port number in BL and BH respectively.
+ * Set up Tx Channel address field for use with PP Cmd Register.
+ * Store address field in BH register.
+ * Inputs: AH = Output port number (0..3).
+ * AL = Data byte.
+ * command = TXDATA0 | INT_EN;
+ * Align port num with address field (b1...b3),
+ * set address for TXDatax, Strobe=0
+ */
+ command |= INT_EN;
+
+ /* Disable interrupts so that the process is not interrupted, then
+ * write the address associated with the current Tx channel to the
+ * PP Command Reg. Do not set the Strobe signal yet.
+ */
+
+ do {
+ portman_write_command(pm, command);
+
+ /* While the address lines settle, write parallel output data to
+ * PP Data Reg. This has no effect until Strobe signal is asserted.
+ */
+
+ portman_write_data(pm, mididata);
+
+ /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP
+ * Status Register), then go write data. Else go back and wait.
+ */
+ } while ((portman_read_status(pm) & TXEMPTY) != TXEMPTY);
+
+ /* TxEmpty is set. Maintain PC/P destination address and assert
+ * Strobe through the PP Command Reg. This will Strobe data into
+ * the PC/P transmitter and set the PC/P BUSY signal.
+ */
+
+ portman_write_command(pm, command | STROBE);
+
+ /* Wait for strobe line to settle and echo back through hardware.
+ * Once it has echoed back, assume that the address and data lines
+ * have settled!
+ */
+
+ while ((portman_read_status(pm) & ESTB) == 0)
+ cpu_relax();
+
+ /* Release strobe and immediately re-allow interrupts. */
+ portman_write_command(pm, command);
+
+ while ((portman_read_status(pm) & ESTB) == ESTB)
+ cpu_relax();
+
+ /* PC/P BUSY is now set. We must wait until BUSY resets itself.
+ * We'll reenable ints while we're waiting.
+ */
+
+ while ((portman_read_status(pm) & BUSY) == BUSY)
+ cpu_relax();
+
+ /* Data sent. */
+}
+
+
+/*
+ * Read MIDI byte from port
+ * Attempt to read input byte from specified hardware input port (0..).
+ * Return -1 if no data
+ */
+static int portman_read_midi(struct portman *pm, int port)
+{
+ unsigned char midi_data = 0;
+ unsigned char cmdout; /* Saved address+IE bit. */
+
+ /* Make sure clocking edge is down before starting... */
+ portman_write_data(pm, 0); /* Make sure edge is down. */
+
+ /* Set destination address to PCP. */
+ cmdout = (port << 1) | INT_EN; /* Address + IE + No Strobe. */
+ portman_write_command(pm, cmdout);
+
+ while ((portman_read_status(pm) & ESTB) == ESTB)
+ cpu_relax(); /* Wait for strobe echo. */
+
+ /* After the address lines settle, check multiplexed RxAvail signal.
+ * If data is available, read it.
+ */
+ if ((portman_read_status(pm) & RXAVAIL) == 0)
+ return -1; /* No data. */
+
+ /* Set the Strobe signal to enable the Rx clocking circuitry. */
+ portman_write_command(pm, cmdout | STROBE); /* Write address+IE+Strobe. */
+
+ while ((portman_read_status(pm) & ESTB) == 0)
+ cpu_relax(); /* Wait for strobe echo. */
+
+ /* The first data bit (msb) is already sitting on the input line. */
+ midi_data = (portman_read_status(pm) & 128);
+ portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
+
+ /* Data bit 6. */
+ portman_write_data(pm, 0); /* Cause falling edge while data settles. */
+ midi_data |= (portman_read_status(pm) >> 1) & 64;
+ portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
+
+ /* Data bit 5. */
+ portman_write_data(pm, 0); /* Cause falling edge while data settles. */
+ midi_data |= (portman_read_status(pm) >> 2) & 32;
+ portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
+
+ /* Data bit 4. */
+ portman_write_data(pm, 0); /* Cause falling edge while data settles. */
+ midi_data |= (portman_read_status(pm) >> 3) & 16;
+ portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
+
+ /* Data bit 3. */
+ portman_write_data(pm, 0); /* Cause falling edge while data settles. */
+ midi_data |= (portman_read_status(pm) >> 4) & 8;
+ portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
+
+ /* Data bit 2. */
+ portman_write_data(pm, 0); /* Cause falling edge while data settles. */
+ midi_data |= (portman_read_status(pm) >> 5) & 4;
+ portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
+
+ /* Data bit 1. */
+ portman_write_data(pm, 0); /* Cause falling edge while data settles. */
+ midi_data |= (portman_read_status(pm) >> 6) & 2;
+ portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
+
+ /* Data bit 0. */
+ portman_write_data(pm, 0); /* Cause falling edge while data settles. */
+ midi_data |= (portman_read_status(pm) >> 7) & 1;
+ portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
+ portman_write_data(pm, 0); /* Return data clock low. */
+
+
+ /* De-assert Strobe and return data. */
+ portman_write_command(pm, cmdout); /* Output saved address+IE. */
+
+ /* Wait for strobe echo. */
+ while ((portman_read_status(pm) & ESTB) == ESTB)
+ cpu_relax();
+
+ return (midi_data & 255); /* Shift back and return value. */
+}
+
+/*
+ * Checks if any input data on the given channel is available
+ * Checks RxAvail
+ */
+static int portman_data_avail(struct portman *pm, int channel)
+{
+ int command = INT_EN;
+ switch (channel) {
+ case 0:
+ command |= RXDATA0;
+ break;
+ case 1:
+ command |= RXDATA1;
+ break;
+ }
+ /* Write hardware (assumme STROBE=0) */
+ portman_write_command(pm, command);
+ /* Check multiplexed RxAvail signal */
+ if ((portman_read_status(pm) & RXAVAIL) == RXAVAIL)
+ return 1; /* Data available */
+
+ /* No Data available */
+ return 0;
+}
+
+
+/*
+ * Flushes any input
+ */
+static void portman_flush_input(struct portman *pm, unsigned char port)
+{
+ /* Local variable for counting things */
+ unsigned int i = 0;
+ unsigned char command = 0;
+
+ switch (port) {
+ case 0:
+ command = RXDATA0;
+ break;
+ case 1:
+ command = RXDATA1;
+ break;
+ default:
+ snd_printk(KERN_WARNING
+ "portman_flush_input() Won't flush port %i\n",
+ port);
+ return;
+ }
+
+ /* Set address for specified channel in port and allow to settle. */
+ portman_write_command(pm, command);
+
+ /* Assert the Strobe and wait for echo back. */
+ portman_write_command(pm, command | STROBE);
+
+ /* Wait for ESTB */
+ while ((portman_read_status(pm) & ESTB) == 0)
+ cpu_relax();
+
+ /* Output clock cycles to the Rx circuitry. */
+ portman_write_data(pm, 0);
+
+ /* Flush 250 bits... */
+ for (i = 0; i < 250; i++) {
+ portman_write_data(pm, 1);
+ portman_write_data(pm, 0);
+ }
+
+ /* Deassert the Strobe signal of the port and wait for it to settle. */
+ portman_write_command(pm, command | INT_EN);
+
+ /* Wait for settling */
+ while ((portman_read_status(pm) & ESTB) == ESTB)
+ cpu_relax();
+}
+
+static int portman_probe(struct parport *p)
+{
+ /* Initialize the parallel port data register. Will set Rx clocks
+ * low in case we happen to be addressing the Rx ports at this time.
+ */
+ /* 1 */
+ parport_write_data(p, 0);
+
+ /* Initialize the parallel port command register, thus initializing
+ * hardware handshake lines to midi box:
+ *
+ * Strobe = 0
+ * Interrupt Enable = 0
+ */
+ /* 2 */
+ parport_write_control(p, 0);
+
+ /* Check if Portman PC/P 2x4 is out there. */
+ /* 3 */
+ parport_write_control(p, RXDATA0); /* Write Strobe=0 to command reg. */
+
+ /* Check for ESTB to be clear */
+ /* 4 */
+ if ((parport_read_status(p) & ESTB) == ESTB)
+ return 1; /* CODE 1 - Strobe Failure. */
+
+ /* Set for RXDATA0 where no damage will be done. */
+ /* 5 */
+ parport_write_control(p, RXDATA0 + STROBE); /* Write Strobe=1 to command reg. */
+
+ /* 6 */
+ if ((parport_read_status(p) & ESTB) != ESTB)
+ return 1; /* CODE 1 - Strobe Failure. */
+
+ /* 7 */
+ parport_write_control(p, 0); /* Reset Strobe=0. */
+
+ /* Check if Tx circuitry is functioning properly. If initialized
+ * unit TxEmpty is false, send out char and see if if goes true.
+ */
+ /* 8 */
+ parport_write_control(p, TXDATA0); /* Tx channel 0, strobe off. */
+
+ /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP
+ * Status Register), then go write data. Else go back and wait.
+ */
+ /* 9 */
+ if ((parport_read_status(p) & TXEMPTY) == 0)
+ return 2;
+
+ /* Return OK status. */
+ return 0;
+}
+
+static int portman_device_init(struct portman *pm)
+{
+ portman_flush_input(pm, 0);
+ portman_flush_input(pm, 1);
+
+ return 0;
+}
+
+/*********************************************************************
+ * Rawmidi
+ *********************************************************************/
+static int snd_portman_midi_open(struct snd_rawmidi_substream *substream)
+{
+ return 0;
+}
+
+static int snd_portman_midi_close(struct snd_rawmidi_substream *substream)
+{
+ return 0;
+}
+
+static void snd_portman_midi_input_trigger(struct snd_rawmidi_substream *substream,
+ int up)
+{
+ struct portman *pm = substream->rmidi->private_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&pm->reg_lock, flags);
+ if (up)
+ pm->mode[substream->number] |= PORTMAN2X4_MODE_INPUT_TRIGGERED;
+ else
+ pm->mode[substream->number] &= ~PORTMAN2X4_MODE_INPUT_TRIGGERED;
+ spin_unlock_irqrestore(&pm->reg_lock, flags);
+}
+
+static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substream,
+ int up)
+{
+ struct portman *pm = substream->rmidi->private_data;
+ unsigned long flags;
+ unsigned char byte;
+
+ spin_lock_irqsave(&pm->reg_lock, flags);
+ if (up) {
+ while ((snd_rawmidi_transmit(substream, &byte, 1) == 1))
+ portman_write_midi(pm, substream->number, byte);
+ }
+ spin_unlock_irqrestore(&pm->reg_lock, flags);
+}
+
+static struct snd_rawmidi_ops snd_portman_midi_output = {
+ .open = snd_portman_midi_open,
+ .close = snd_portman_midi_close,
+ .trigger = snd_portman_midi_output_trigger,
+};
+
+static struct snd_rawmidi_ops snd_portman_midi_input = {
+ .open = snd_portman_midi_open,
+ .close = snd_portman_midi_close,
+ .trigger = snd_portman_midi_input_trigger,
+};
+
+/* Create and initialize the rawmidi component */
+static int __devinit snd_portman_rawmidi_create(struct snd_card *card)
+{
+ struct portman *pm = card->private_data;
+ struct snd_rawmidi *rmidi;
+ struct snd_rawmidi_substream *substream;
+ int err;
+
+ err = snd_rawmidi_new(card, CARD_NAME, 0,
+ PORTMAN_NUM_OUTPUT_PORTS,
+ PORTMAN_NUM_INPUT_PORTS,
+ &rmidi);
+ if (err < 0)
+ return err;
+
+ rmidi->private_data = pm;
+ strcpy(rmidi->name, CARD_NAME);
+ rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
+ SNDRV_RAWMIDI_INFO_INPUT |
+ SNDRV_RAWMIDI_INFO_DUPLEX;
+
+ pm->rmidi = rmidi;
+
+ /* register rawmidi ops */
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
+ &snd_portman_midi_output);
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
+ &snd_portman_midi_input);
+
+ /* name substreams */
+ /* output */
+ list_for_each_entry(substream,
+ &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
+ list) {
+ sprintf(substream->name,
+ "Portman2x4 %d", substream->number+1);
+ }
+ /* input */
+ list_for_each_entry(substream,
+ &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
+ list) {
+ pm->midi_input[substream->number] = substream;
+ sprintf(substream->name,
+ "Portman2x4 %d", substream->number+1);
+ }
+
+ return err;
+}
+
+/*********************************************************************
+ * parport stuff
+ *********************************************************************/
+static void snd_portman_interrupt(int irq, void *userdata)
+{
+ unsigned char midivalue = 0;
+ struct portman *pm = ((struct snd_card*)userdata)->private_data;
+
+ spin_lock(&pm->reg_lock);
+
+ /* While any input data is waiting */
+ while ((portman_read_status(pm) & INT_REQ) == INT_REQ) {
+ /* If data available on channel 0,
+ read it and stuff it into the queue. */
+ if (portman_data_avail(pm, 0)) {
+ /* Read Midi */
+ midivalue = portman_read_midi(pm, 0);
+ /* put midi into queue... */
+ if (pm->mode[0] & PORTMAN2X4_MODE_INPUT_TRIGGERED)
+ snd_rawmidi_receive(pm->midi_input[0],
+ &midivalue, 1);
+
+ }
+ /* If data available on channel 1,
+ read it and stuff it into the queue. */
+ if (portman_data_avail(pm, 1)) {
+ /* Read Midi */
+ midivalue = portman_read_midi(pm, 1);
+ /* put midi into queue... */
+ if (pm->mode[1] & PORTMAN2X4_MODE_INPUT_TRIGGERED)
+ snd_rawmidi_receive(pm->midi_input[1],
+ &midivalue, 1);
+ }
+
+ }
+
+ spin_unlock(&pm->reg_lock);
+}
+
+static int __devinit snd_portman_probe_port(struct parport *p)
+{
+ struct pardevice *pardev;
+ int res;
+
+ pardev = parport_register_device(p, DRIVER_NAME,
+ NULL, NULL, NULL,
+ 0, NULL);
+ if (!pardev)
+ return -EIO;
+
+ if (parport_claim(pardev)) {
+ parport_unregister_device(pardev);
+ return -EIO;
+ }
+
+ res = portman_probe(p);
+
+ parport_release(pardev);
+ parport_unregister_device(pardev);
+
+ return res;
+}
+
+static void __devinit snd_portman_attach(struct parport *p)
+{
+ struct platform_device *device;
+
+ device = platform_device_alloc(PLATFORM_DRIVER, device_count);
+ if (!device)
+ return;
+
+ /* Temporary assignment to forward the parport */
+ platform_set_drvdata(device, p);
+
+ if (platform_device_register(device) < 0) {
+ platform_device_put(device);
+ return;
+ }
+
+ /* Since we dont get the return value of probe
+ * We need to check if device probing succeeded or not */
+ if (!platform_get_drvdata(device)) {
+ platform_device_unregister(device);
+ return;
+ }
+
+ /* register device in global table */
+ platform_devices[device_count] = device;
+ device_count++;
+}
+
+static void snd_portman_detach(struct parport *p)
+{
+ /* nothing to do here */
+}
+
+static struct parport_driver portman_parport_driver = {
+ .name = "portman2x4",
+ .attach = snd_portman_attach,
+ .detach = snd_portman_detach
+};
+
+/*********************************************************************
+ * platform stuff
+ *********************************************************************/
+static void snd_portman_card_private_free(struct snd_card *card)
+{
+ struct portman *pm = card->private_data;
+ struct pardevice *pardev = pm->pardev;
+
+ if (pardev) {
+ if (pm->pardev_claimed)
+ parport_release(pardev);
+ parport_unregister_device(pardev);
+ }
+
+ portman_free(pm);
+}
+
+static int __devinit snd_portman_probe(struct platform_device *pdev)
+{
+ struct pardevice *pardev;
+ struct parport *p;
+ int dev = pdev->id;
+ struct snd_card *card = NULL;
+ struct portman *pm = NULL;
+ int err;
+
+ p = platform_get_drvdata(pdev);
+ platform_set_drvdata(pdev, NULL);
+
+ if (dev >= SNDRV_CARDS)
+ return -ENODEV;
+ if (!enable[dev])
+ return -ENOENT;
+
+ if ((err = snd_portman_probe_port(p)) < 0)
+ return err;
+
+ card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
+ if (card == NULL) {
+ snd_printd("Cannot create card\n");
+ return -ENOMEM;
+ }
+ strcpy(card->driver, DRIVER_NAME);
+ strcpy(card->shortname, CARD_NAME);
+ sprintf(card->longname, "%s at 0x%lx, irq %i",
+ card->shortname, p->base, p->irq);
+
+ pardev = parport_register_device(p, /* port */
+ DRIVER_NAME, /* name */
+ NULL, /* preempt */
+ NULL, /* wakeup */
+ snd_portman_interrupt, /* ISR */
+ PARPORT_DEV_EXCL, /* flags */
+ (void *)card); /* private */
+ if (pardev == NULL) {
+ snd_printd("Cannot register pardevice\n");
+ err = -EIO;
+ goto __err;
+ }
+
+ if ((err = portman_create(card, pardev, &pm)) < 0) {
+ snd_printd("Cannot create main component\n");
+ parport_unregister_device(pardev);
+ goto __err;
+ }
+ card->private_data = pm;
+ card->private_free = snd_portman_card_private_free;
+
+ if ((err = snd_portman_rawmidi_create(card)) < 0) {
+ snd_printd("Creating Rawmidi component failed\n");
+ goto __err;
+ }
+
+ /* claim parport */
+ if (parport_claim(pardev)) {
+ snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
+ err = -EIO;
+ goto __err;
+ }
+ pm->pardev_claimed = 1;
+
+ /* init device */
+ if ((err = portman_device_init(pm)) < 0)
+ goto __err;
+
+ platform_set_drvdata(pdev, card);
+
+ /* At this point card will be usable */
+ if ((err = snd_card_register(card)) < 0) {
+ snd_printd("Cannot register card\n");
+ goto __err;
+ }
+
+ snd_printk(KERN_INFO "Portman 2x4 on 0x%lx\n", p->base);
+ return 0;
+
+__err:
+ snd_card_free(card);
+ return err;
+}
+
+static int snd_portman_remove(struct platform_device *pdev)
+{
+ struct snd_card *card = platform_get_drvdata(pdev);
+
+ if (card)
+ snd_card_free(card);
+
+ return 0;
+}
+
+
+static struct platform_driver snd_portman_driver = {
+ .probe = snd_portman_probe,
+ .remove = snd_portman_remove,
+ .driver = {
+ .name = PLATFORM_DRIVER
+ }
+};
+
+/*********************************************************************
+ * module init stuff
+ *********************************************************************/
+static void snd_portman_unregister_all(void)
+{
+ int i;
+
+ for (i = 0; i < SNDRV_CARDS; ++i) {
+ if (platform_devices[i]) {
+ platform_device_unregister(platform_devices[i]);
+ platform_devices[i] = NULL;
+ }
+ }
+ platform_driver_unregister(&snd_portman_driver);
+ parport_unregister_driver(&portman_parport_driver);
+}
+
+static int __init snd_portman_module_init(void)
+{
+ int err;
+
+ if ((err = platform_driver_register(&snd_portman_driver)) < 0)
+ return err;
+
+ if (parport_register_driver(&portman_parport_driver) != 0) {
+ platform_driver_unregister(&snd_portman_driver);
+ return -EIO;
+ }
+
+ if (device_count == 0) {
+ snd_portman_unregister_all();
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void __exit snd_portman_module_exit(void)
+{
+ snd_portman_unregister_all();
+}
+
+module_init(snd_portman_module_init);
+module_exit(snd_portman_module_exit);
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff