852 lines
24 KiB
C
852 lines
24 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for Midiman Portman2x4 parallel port midi interface
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*
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* Copyright (c) by Levent Guendogdu <levon@feature-it.com>
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*
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* ChangeLog
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* Jan 24 2007 Matthias Koenig <mkoenig@suse.de>
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* - cleanup and rewrite
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* Sep 30 2004 Tobias Gehrig <tobias@gehrig.tk>
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* - source code cleanup
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* Sep 03 2004 Tobias Gehrig <tobias@gehrig.tk>
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* - fixed compilation problem with alsa 1.0.6a (removed MODULE_CLASSES,
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* MODULE_PARM_SYNTAX and changed MODULE_DEVICES to
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* MODULE_SUPPORTED_DEVICE)
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* Mar 24 2004 Tobias Gehrig <tobias@gehrig.tk>
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* - added 2.6 kernel support
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* Mar 18 2004 Tobias Gehrig <tobias@gehrig.tk>
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* - added parport_unregister_driver to the startup routine if the driver fails to detect a portman
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* - added support for all 4 output ports in portman_putmidi
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* Mar 17 2004 Tobias Gehrig <tobias@gehrig.tk>
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* - added checks for opened input device in interrupt handler
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* Feb 20 2004 Tobias Gehrig <tobias@gehrig.tk>
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* - ported from alsa 0.5 to 1.0
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*/
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/parport.h>
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#include <linux/spinlock.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include <sound/rawmidi.h>
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#include <sound/control.h>
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#define CARD_NAME "Portman 2x4"
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#define DRIVER_NAME "portman"
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#define PLATFORM_DRIVER "snd_portman2x4"
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
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static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
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static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
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static struct platform_device *platform_devices[SNDRV_CARDS];
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static int device_count;
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module_param_array(index, int, NULL, 0444);
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MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
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module_param_array(id, charp, NULL, 0444);
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MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
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module_param_array(enable, bool, NULL, 0444);
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MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
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MODULE_AUTHOR("Levent Guendogdu, Tobias Gehrig, Matthias Koenig");
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MODULE_DESCRIPTION("Midiman Portman2x4");
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MODULE_LICENSE("GPL");
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/*********************************************************************
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* Chip specific
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*********************************************************************/
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#define PORTMAN_NUM_INPUT_PORTS 2
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#define PORTMAN_NUM_OUTPUT_PORTS 4
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struct portman {
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spinlock_t reg_lock;
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struct snd_card *card;
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struct snd_rawmidi *rmidi;
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struct pardevice *pardev;
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int open_count;
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int mode[PORTMAN_NUM_INPUT_PORTS];
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struct snd_rawmidi_substream *midi_input[PORTMAN_NUM_INPUT_PORTS];
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};
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static int portman_free(struct portman *pm)
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{
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kfree(pm);
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return 0;
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}
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static int portman_create(struct snd_card *card,
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struct pardevice *pardev,
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struct portman **rchip)
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{
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struct portman *pm;
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*rchip = NULL;
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pm = kzalloc(sizeof(struct portman), GFP_KERNEL);
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if (pm == NULL)
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return -ENOMEM;
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/* Init chip specific data */
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spin_lock_init(&pm->reg_lock);
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pm->card = card;
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pm->pardev = pardev;
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*rchip = pm;
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return 0;
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}
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/*********************************************************************
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* HW related constants
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*********************************************************************/
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/* Standard PC parallel port status register equates. */
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#define PP_STAT_BSY 0x80 /* Busy status. Inverted. */
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#define PP_STAT_ACK 0x40 /* Acknowledge. Non-Inverted. */
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#define PP_STAT_POUT 0x20 /* Paper Out. Non-Inverted. */
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#define PP_STAT_SEL 0x10 /* Select. Non-Inverted. */
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#define PP_STAT_ERR 0x08 /* Error. Non-Inverted. */
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/* Standard PC parallel port command register equates. */
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#define PP_CMD_IEN 0x10 /* IRQ Enable. Non-Inverted. */
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#define PP_CMD_SELI 0x08 /* Select Input. Inverted. */
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#define PP_CMD_INIT 0x04 /* Init Printer. Non-Inverted. */
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#define PP_CMD_FEED 0x02 /* Auto Feed. Inverted. */
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#define PP_CMD_STB 0x01 /* Strobe. Inverted. */
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/* Parallel Port Command Register as implemented by PCP2x4. */
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#define INT_EN PP_CMD_IEN /* Interrupt enable. */
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#define STROBE PP_CMD_STB /* Command strobe. */
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/* The parallel port command register field (b1..b3) selects the
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* various "registers" within the PC/P 2x4. These are the internal
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* address of these "registers" that must be written to the parallel
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* port command register.
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*/
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#define RXDATA0 (0 << 1) /* PCP RxData channel 0. */
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#define RXDATA1 (1 << 1) /* PCP RxData channel 1. */
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#define GEN_CTL (2 << 1) /* PCP General Control Register. */
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#define SYNC_CTL (3 << 1) /* PCP Sync Control Register. */
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#define TXDATA0 (4 << 1) /* PCP TxData channel 0. */
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#define TXDATA1 (5 << 1) /* PCP TxData channel 1. */
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#define TXDATA2 (6 << 1) /* PCP TxData channel 2. */
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#define TXDATA3 (7 << 1) /* PCP TxData channel 3. */
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/* Parallel Port Status Register as implemented by PCP2x4. */
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#define ESTB PP_STAT_POUT /* Echoed strobe. */
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#define INT_REQ PP_STAT_ACK /* Input data int request. */
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#define BUSY PP_STAT_ERR /* Interface Busy. */
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/* Parallel Port Status Register BUSY and SELECT lines are multiplexed
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* between several functions. Depending on which 2x4 "register" is
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* currently selected (b1..b3), the BUSY and SELECT lines are
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* assigned as follows:
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*
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* SELECT LINE: A3 A2 A1
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* --------
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*/
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#define RXAVAIL PP_STAT_SEL /* Rx Available, channel 0. 0 0 0 */
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// RXAVAIL1 PP_STAT_SEL /* Rx Available, channel 1. 0 0 1 */
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#define SYNC_STAT PP_STAT_SEL /* Reserved - Sync Status. 0 1 0 */
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// /* Reserved. 0 1 1 */
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#define TXEMPTY PP_STAT_SEL /* Tx Empty, channel 0. 1 0 0 */
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// TXEMPTY1 PP_STAT_SEL /* Tx Empty, channel 1. 1 0 1 */
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// TXEMPTY2 PP_STAT_SEL /* Tx Empty, channel 2. 1 1 0 */
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// TXEMPTY3 PP_STAT_SEL /* Tx Empty, channel 3. 1 1 1 */
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/* BUSY LINE: A3 A2 A1
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* --------
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*/
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#define RXDATA PP_STAT_BSY /* Rx Input Data, channel 0. 0 0 0 */
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// RXDATA1 PP_STAT_BSY /* Rx Input Data, channel 1. 0 0 1 */
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#define SYNC_DATA PP_STAT_BSY /* Reserved - Sync Data. 0 1 0 */
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/* Reserved. 0 1 1 */
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#define DATA_ECHO PP_STAT_BSY /* Parallel Port Data Echo. 1 0 0 */
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#define A0_ECHO PP_STAT_BSY /* Address 0 Echo. 1 0 1 */
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#define A1_ECHO PP_STAT_BSY /* Address 1 Echo. 1 1 0 */
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#define A2_ECHO PP_STAT_BSY /* Address 2 Echo. 1 1 1 */
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#define PORTMAN2X4_MODE_INPUT_TRIGGERED 0x01
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/*********************************************************************
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* Hardware specific functions
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*********************************************************************/
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static inline void portman_write_command(struct portman *pm, u8 value)
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{
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parport_write_control(pm->pardev->port, value);
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}
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static inline u8 portman_read_status(struct portman *pm)
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{
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return parport_read_status(pm->pardev->port);
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}
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static inline void portman_write_data(struct portman *pm, u8 value)
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{
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parport_write_data(pm->pardev->port, value);
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}
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static void portman_write_midi(struct portman *pm,
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int port, u8 mididata)
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{
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int command = ((port + 4) << 1);
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/* Get entering data byte and port number in BL and BH respectively.
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* Set up Tx Channel address field for use with PP Cmd Register.
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* Store address field in BH register.
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* Inputs: AH = Output port number (0..3).
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* AL = Data byte.
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* command = TXDATA0 | INT_EN;
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* Align port num with address field (b1...b3),
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* set address for TXDatax, Strobe=0
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*/
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command |= INT_EN;
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/* Disable interrupts so that the process is not interrupted, then
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* write the address associated with the current Tx channel to the
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* PP Command Reg. Do not set the Strobe signal yet.
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*/
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do {
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portman_write_command(pm, command);
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/* While the address lines settle, write parallel output data to
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* PP Data Reg. This has no effect until Strobe signal is asserted.
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*/
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portman_write_data(pm, mididata);
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/* If PCP channel's TxEmpty is set (TxEmpty is read through the PP
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* Status Register), then go write data. Else go back and wait.
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*/
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} while ((portman_read_status(pm) & TXEMPTY) != TXEMPTY);
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/* TxEmpty is set. Maintain PC/P destination address and assert
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* Strobe through the PP Command Reg. This will Strobe data into
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* the PC/P transmitter and set the PC/P BUSY signal.
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*/
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portman_write_command(pm, command | STROBE);
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/* Wait for strobe line to settle and echo back through hardware.
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* Once it has echoed back, assume that the address and data lines
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* have settled!
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*/
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while ((portman_read_status(pm) & ESTB) == 0)
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cpu_relax();
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/* Release strobe and immediately re-allow interrupts. */
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portman_write_command(pm, command);
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while ((portman_read_status(pm) & ESTB) == ESTB)
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cpu_relax();
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/* PC/P BUSY is now set. We must wait until BUSY resets itself.
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* We'll reenable ints while we're waiting.
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*/
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while ((portman_read_status(pm) & BUSY) == BUSY)
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cpu_relax();
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/* Data sent. */
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}
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/*
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* Read MIDI byte from port
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* Attempt to read input byte from specified hardware input port (0..).
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* Return -1 if no data
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*/
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static int portman_read_midi(struct portman *pm, int port)
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{
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unsigned char midi_data = 0;
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unsigned char cmdout; /* Saved address+IE bit. */
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/* Make sure clocking edge is down before starting... */
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portman_write_data(pm, 0); /* Make sure edge is down. */
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/* Set destination address to PCP. */
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cmdout = (port << 1) | INT_EN; /* Address + IE + No Strobe. */
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portman_write_command(pm, cmdout);
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while ((portman_read_status(pm) & ESTB) == ESTB)
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cpu_relax(); /* Wait for strobe echo. */
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/* After the address lines settle, check multiplexed RxAvail signal.
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* If data is available, read it.
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*/
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if ((portman_read_status(pm) & RXAVAIL) == 0)
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return -1; /* No data. */
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/* Set the Strobe signal to enable the Rx clocking circuitry. */
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portman_write_command(pm, cmdout | STROBE); /* Write address+IE+Strobe. */
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while ((portman_read_status(pm) & ESTB) == 0)
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cpu_relax(); /* Wait for strobe echo. */
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/* The first data bit (msb) is already sitting on the input line. */
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midi_data = (portman_read_status(pm) & 128);
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portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
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/* Data bit 6. */
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portman_write_data(pm, 0); /* Cause falling edge while data settles. */
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midi_data |= (portman_read_status(pm) >> 1) & 64;
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portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
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/* Data bit 5. */
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portman_write_data(pm, 0); /* Cause falling edge while data settles. */
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midi_data |= (portman_read_status(pm) >> 2) & 32;
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portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
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/* Data bit 4. */
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portman_write_data(pm, 0); /* Cause falling edge while data settles. */
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midi_data |= (portman_read_status(pm) >> 3) & 16;
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portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
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/* Data bit 3. */
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portman_write_data(pm, 0); /* Cause falling edge while data settles. */
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midi_data |= (portman_read_status(pm) >> 4) & 8;
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portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
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/* Data bit 2. */
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portman_write_data(pm, 0); /* Cause falling edge while data settles. */
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midi_data |= (portman_read_status(pm) >> 5) & 4;
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portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
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/* Data bit 1. */
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portman_write_data(pm, 0); /* Cause falling edge while data settles. */
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midi_data |= (portman_read_status(pm) >> 6) & 2;
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portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
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/* Data bit 0. */
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portman_write_data(pm, 0); /* Cause falling edge while data settles. */
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midi_data |= (portman_read_status(pm) >> 7) & 1;
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portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
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portman_write_data(pm, 0); /* Return data clock low. */
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/* De-assert Strobe and return data. */
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portman_write_command(pm, cmdout); /* Output saved address+IE. */
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/* Wait for strobe echo. */
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while ((portman_read_status(pm) & ESTB) == ESTB)
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cpu_relax();
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return (midi_data & 255); /* Shift back and return value. */
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}
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/*
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* Checks if any input data on the given channel is available
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* Checks RxAvail
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*/
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static int portman_data_avail(struct portman *pm, int channel)
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{
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int command = INT_EN;
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switch (channel) {
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case 0:
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command |= RXDATA0;
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break;
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case 1:
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command |= RXDATA1;
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break;
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}
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/* Write hardware (assumme STROBE=0) */
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portman_write_command(pm, command);
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/* Check multiplexed RxAvail signal */
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if ((portman_read_status(pm) & RXAVAIL) == RXAVAIL)
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return 1; /* Data available */
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/* No Data available */
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return 0;
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}
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/*
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* Flushes any input
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*/
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static void portman_flush_input(struct portman *pm, unsigned char port)
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{
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/* Local variable for counting things */
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unsigned int i = 0;
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unsigned char command = 0;
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switch (port) {
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case 0:
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command = RXDATA0;
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break;
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case 1:
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command = RXDATA1;
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break;
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default:
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snd_printk(KERN_WARNING
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"portman_flush_input() Won't flush port %i\n",
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port);
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return;
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}
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/* Set address for specified channel in port and allow to settle. */
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portman_write_command(pm, command);
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/* Assert the Strobe and wait for echo back. */
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portman_write_command(pm, command | STROBE);
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/* Wait for ESTB */
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while ((portman_read_status(pm) & ESTB) == 0)
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cpu_relax();
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/* Output clock cycles to the Rx circuitry. */
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portman_write_data(pm, 0);
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/* Flush 250 bits... */
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for (i = 0; i < 250; i++) {
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portman_write_data(pm, 1);
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portman_write_data(pm, 0);
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}
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/* Deassert the Strobe signal of the port and wait for it to settle. */
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portman_write_command(pm, command | INT_EN);
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/* Wait for settling */
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while ((portman_read_status(pm) & ESTB) == ESTB)
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cpu_relax();
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}
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static int portman_probe(struct parport *p)
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{
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/* Initialize the parallel port data register. Will set Rx clocks
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* low in case we happen to be addressing the Rx ports at this time.
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*/
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/* 1 */
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parport_write_data(p, 0);
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/* Initialize the parallel port command register, thus initializing
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* hardware handshake lines to midi box:
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*
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* Strobe = 0
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* Interrupt Enable = 0
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*/
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/* 2 */
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parport_write_control(p, 0);
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/* Check if Portman PC/P 2x4 is out there. */
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/* 3 */
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parport_write_control(p, RXDATA0); /* Write Strobe=0 to command reg. */
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/* Check for ESTB to be clear */
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/* 4 */
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if ((parport_read_status(p) & ESTB) == ESTB)
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return 1; /* CODE 1 - Strobe Failure. */
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/* Set for RXDATA0 where no damage will be done. */
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/* 5 */
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parport_write_control(p, RXDATA0 | STROBE); /* Write Strobe=1 to command reg. */
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/* 6 */
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if ((parport_read_status(p) & ESTB) != ESTB)
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return 1; /* CODE 1 - Strobe Failure. */
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/* 7 */
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parport_write_control(p, 0); /* Reset Strobe=0. */
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/* Check if Tx circuitry is functioning properly. If initialized
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* unit TxEmpty is false, send out char and see if it goes true.
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*/
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/* 8 */
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parport_write_control(p, TXDATA0); /* Tx channel 0, strobe off. */
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/* If PCP channel's TxEmpty is set (TxEmpty is read through the PP
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* Status Register), then go write data. Else go back and wait.
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*/
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/* 9 */
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if ((parport_read_status(p) & TXEMPTY) == 0)
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return 2;
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/* Return OK status. */
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return 0;
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}
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static int portman_device_init(struct portman *pm)
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{
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portman_flush_input(pm, 0);
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portman_flush_input(pm, 1);
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return 0;
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}
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/*********************************************************************
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* Rawmidi
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*********************************************************************/
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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 const 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 const 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 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 int snd_portman_dev_probe(struct pardevice *pardev)
|
|
{
|
|
if (strcmp(pardev->name, DRIVER_NAME))
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct parport_driver portman_parport_driver = {
|
|
.name = "portman2x4",
|
|
.probe = snd_portman_dev_probe,
|
|
.match_port = snd_portman_attach,
|
|
.detach = snd_portman_detach,
|
|
.devmodel = true,
|
|
};
|
|
|
|
/*********************************************************************
|
|
* 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) {
|
|
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;
|
|
struct pardev_cb portman_cb = {
|
|
.preempt = NULL,
|
|
.wakeup = NULL,
|
|
.irq_func = snd_portman_interrupt, /* ISR */
|
|
.flags = PARPORT_DEV_EXCL, /* flags */
|
|
};
|
|
|
|
p = platform_get_drvdata(pdev);
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
if (dev >= SNDRV_CARDS)
|
|
return -ENODEV;
|
|
if (!enable[dev])
|
|
return -ENOENT;
|
|
|
|
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);
|
|
|
|
portman_cb.private = card; /* private */
|
|
pardev = parport_register_dev_model(p, /* port */
|
|
DRIVER_NAME, /* name */
|
|
&portman_cb, /* callbacks */
|
|
pdev->id); /* device number */
|
|
if (pardev == NULL) {
|
|
snd_printd("Cannot register pardevice\n");
|
|
err = -EIO;
|
|
goto __err;
|
|
}
|
|
|
|
/* claim parport */
|
|
if (parport_claim(pardev)) {
|
|
snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
|
|
err = -EIO;
|
|
goto free_pardev;
|
|
}
|
|
|
|
err = portman_create(card, pardev, &pm);
|
|
if (err < 0) {
|
|
snd_printd("Cannot create main component\n");
|
|
goto release_pardev;
|
|
}
|
|
card->private_data = pm;
|
|
card->private_free = snd_portman_card_private_free;
|
|
|
|
err = portman_probe(p);
|
|
if (err) {
|
|
err = -EIO;
|
|
goto __err;
|
|
}
|
|
|
|
err = snd_portman_rawmidi_create(card);
|
|
if (err < 0) {
|
|
snd_printd("Creating Rawmidi component failed\n");
|
|
goto __err;
|
|
}
|
|
|
|
/* init device */
|
|
err = portman_device_init(pm);
|
|
if (err < 0)
|
|
goto __err;
|
|
|
|
platform_set_drvdata(pdev, card);
|
|
|
|
/* At this point card will be usable */
|
|
err = snd_card_register(card);
|
|
if (err < 0) {
|
|
snd_printd("Cannot register card\n");
|
|
goto __err;
|
|
}
|
|
|
|
snd_printk(KERN_INFO "Portman 2x4 on 0x%lx\n", p->base);
|
|
return 0;
|
|
|
|
release_pardev:
|
|
parport_release(pardev);
|
|
free_pardev:
|
|
parport_unregister_device(pardev);
|
|
__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;
|
|
|
|
err = platform_driver_register(&snd_portman_driver);
|
|
if (err < 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);
|