diff options
Diffstat (limited to 'kernel/sound/drivers/portman2x4.c')
| -rw-r--r-- | kernel/sound/drivers/portman2x4.c | 878 |
1 files changed, 878 insertions, 0 deletions
diff --git a/kernel/sound/drivers/portman2x4.c b/kernel/sound/drivers/portman2x4.c new file mode 100644 index 000000000..464385a48 --- /dev/null +++ b/kernel/sound/drivers/portman2x4.c @@ -0,0 +1,878 @@ +/* + * 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 <linux/init.h> +#include <linux/platform_device.h> +#include <linux/parport.h> +#include <linux/spinlock.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/module.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 bool 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 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 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(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 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 ? -EIO : 0; +} + +static void 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_add(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 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; + + err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE, + 0, &card); + if (err < 0) { + snd_printd("Cannot create card\n"); + return err; + } + 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); |