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856 lines
24 KiB
856 lines
24 KiB
// 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 <[email protected]> |
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* |
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* ChangeLog |
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* Jan 24 2007 Matthias Koenig <[email protected]> |
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* - cleanup and rewrite |
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* Sep 30 2004 Tobias Gehrig <[email protected]> |
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* - source code cleanup |
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* Sep 03 2004 Tobias Gehrig <[email protected]> |
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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 <[email protected]> |
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* - added 2.6 kernel support |
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* Mar 18 2004 Tobias Gehrig <[email protected]> |
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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 <[email protected]> |
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* - added checks for opened input device in interrupt handler |
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* Feb 20 2004 Tobias Gehrig <[email protected]> |
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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_command(struct portman *pm) |
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{ |
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return parport_read_control(pm->pardev->port); |
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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 u8 portman_read_data(struct portman *pm) |
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{ |
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return parport_read_data(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) |
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{ |
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return 0; |
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} |
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static int snd_portman_midi_close(struct snd_rawmidi_substream *substream) |
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{ |
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return 0; |
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} |
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static void snd_portman_midi_input_trigger(struct snd_rawmidi_substream *substream, |
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int up) |
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{ |
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struct portman *pm = substream->rmidi->private_data; |
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unsigned long flags; |
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spin_lock_irqsave(&pm->reg_lock, flags); |
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if (up) |
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pm->mode[substream->number] |= PORTMAN2X4_MODE_INPUT_TRIGGERED; |
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else |
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pm->mode[substream->number] &= ~PORTMAN2X4_MODE_INPUT_TRIGGERED; |
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spin_unlock_irqrestore(&pm->reg_lock, flags); |
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} |
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static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substream, |
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int up) |
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{ |
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struct portman *pm = substream->rmidi->private_data; |
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unsigned long flags; |
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unsigned char byte; |
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spin_lock_irqsave(&pm->reg_lock, flags); |
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if (up) { |
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while ((snd_rawmidi_transmit(substream, &byte, 1) == 1)) |
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portman_write_midi(pm, substream->number, byte); |
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} |
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spin_unlock_irqrestore(&pm->reg_lock, flags); |
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} |
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static const struct snd_rawmidi_ops snd_portman_midi_output = { |
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.open = snd_portman_midi_open, |
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.close = snd_portman_midi_close, |
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.trigger = snd_portman_midi_output_trigger, |
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}; |
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|
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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; |
|
} |
|
|
|
if ((err = portman_create(card, pardev, &pm)) < 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; |
|
} |
|
|
|
if ((err = snd_portman_rawmidi_create(card)) < 0) { |
|
snd_printd("Creating Rawmidi component failed\n"); |
|
goto __err; |
|
} |
|
|
|
/* 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; |
|
|
|
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; |
|
|
|
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);
|
|
|