diff options
Diffstat (limited to 'sound/oss/uart6850.c')
| -rw-r--r-- | sound/oss/uart6850.c | 361 |
1 files changed, 0 insertions, 361 deletions
diff --git a/sound/oss/uart6850.c b/sound/oss/uart6850.c deleted file mode 100644 index eda32d7eddbd..000000000000 --- a/sound/oss/uart6850.c +++ /dev/null @@ -1,361 +0,0 @@ -/* - * sound/oss/uart6850.c - * - * - * Copyright (C) by Hannu Savolainen 1993-1997 - * - * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL) - * Version 2 (June 1991). See the "COPYING" file distributed with this software - * for more info. - * Extended by Alan Cox for Red Hat Software. Now a loadable MIDI driver. - * 28/4/97 - (C) Copyright Alan Cox. Released under the GPL version 2. - * - * Alan Cox: Updated for new modular code. Removed snd_* irq handling. Now - * uses native linux resources - * Christoph Hellwig: Adapted to module_init/module_exit - * Jeff Garzik: Made it work again, in theory - * FIXME: If the request_irq() succeeds, the probe succeeds. Ug. - * - * Status: Testing required (no shit -jgarzik) - * - * - */ - -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/spinlock.h> -/* Mon Nov 22 22:38:35 MET 1993 marco@driq.home.usn.nl: - * added 6850 support, used with COVOX SoundMaster II and custom cards. - */ - -#include "sound_config.h" - -static int uart6850_base = 0x330; - -static int *uart6850_osp; - -#define DATAPORT (uart6850_base) -#define COMDPORT (uart6850_base+1) -#define STATPORT (uart6850_base+1) - -static int uart6850_status(void) -{ - return inb(STATPORT); -} - -#define input_avail() (uart6850_status()&INPUT_AVAIL) -#define output_ready() (uart6850_status()&OUTPUT_READY) - -static void uart6850_cmd(unsigned char cmd) -{ - outb(cmd, COMDPORT); -} - -static int uart6850_read(void) -{ - return inb(DATAPORT); -} - -static void uart6850_write(unsigned char byte) -{ - outb(byte, DATAPORT); -} - -#define OUTPUT_READY 0x02 /* Mask for data ready Bit */ -#define INPUT_AVAIL 0x01 /* Mask for Data Send Ready Bit */ - -#define UART_RESET 0x95 -#define UART_MODE_ON 0x03 - -static int uart6850_opened; -static int uart6850_irq; -static int uart6850_detected; -static int my_dev; -static DEFINE_SPINLOCK(lock); - -static void (*midi_input_intr) (int dev, unsigned char data); -static void poll_uart6850(unsigned long dummy); - - -static DEFINE_TIMER(uart6850_timer, poll_uart6850, 0, 0); - -static void uart6850_input_loop(void) -{ - int count = 10; - - while (count) - { - /* - * Not timed out - */ - if (input_avail()) - { - unsigned char c = uart6850_read(); - count = 100; - if (uart6850_opened & OPEN_READ) - midi_input_intr(my_dev, c); - } - else - { - while (!input_avail() && count) - count--; - } - } -} - -static irqreturn_t m6850intr(int irq, void *dev_id) -{ - if (input_avail()) - uart6850_input_loop(); - return IRQ_HANDLED; -} - -/* - * It looks like there is no input interrupts in the UART mode. Let's try - * polling. - */ - -static void poll_uart6850(unsigned long dummy) -{ - unsigned long flags; - - if (!(uart6850_opened & OPEN_READ)) - return; /* Device has been closed */ - - spin_lock_irqsave(&lock,flags); - if (input_avail()) - uart6850_input_loop(); - - uart6850_timer.expires = 1 + jiffies; - add_timer(&uart6850_timer); - - /* - * Come back later - */ - - spin_unlock_irqrestore(&lock,flags); -} - -static int uart6850_open(int dev, int mode, - void (*input) (int dev, unsigned char data), - void (*output) (int dev) -) -{ - if (uart6850_opened) - { -/* printk("Midi6850: Midi busy\n");*/ - return -EBUSY; - } - - uart6850_cmd(UART_RESET); - uart6850_input_loop(); - midi_input_intr = input; - uart6850_opened = mode; - poll_uart6850(0); /* - * Enable input polling - */ - - return 0; -} - -static void uart6850_close(int dev) -{ - uart6850_cmd(UART_MODE_ON); - del_timer(&uart6850_timer); - uart6850_opened = 0; -} - -static int uart6850_out(int dev, unsigned char midi_byte) -{ - int timeout; - unsigned long flags; - - /* - * Test for input since pending input seems to block the output. - */ - - spin_lock_irqsave(&lock,flags); - - if (input_avail()) - uart6850_input_loop(); - - spin_unlock_irqrestore(&lock,flags); - - /* - * Sometimes it takes about 13000 loops before the output becomes ready - * (After reset). Normally it takes just about 10 loops. - */ - - for (timeout = 30000; timeout > 0 && !output_ready(); timeout--); /* - * Wait - */ - if (!output_ready()) - { - printk(KERN_WARNING "Midi6850: Timeout\n"); - return 0; - } - uart6850_write(midi_byte); - return 1; -} - -static inline int uart6850_command(int dev, unsigned char *midi_byte) -{ - return 1; -} - -static inline int uart6850_start_read(int dev) -{ - return 0; -} - -static inline int uart6850_end_read(int dev) -{ - return 0; -} - -static inline void uart6850_kick(int dev) -{ -} - -static inline int uart6850_buffer_status(int dev) -{ - return 0; /* - * No data in buffers - */ -} - -#define MIDI_SYNTH_NAME "6850 UART Midi" -#define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT -#include "midi_synth.h" - -static struct midi_operations uart6850_operations = -{ - .owner = THIS_MODULE, - .info = {"6850 UART", 0, 0, SNDCARD_UART6850}, - .converter = &std_midi_synth, - .in_info = {0}, - .open = uart6850_open, - .close = uart6850_close, - .outputc = uart6850_out, - .start_read = uart6850_start_read, - .end_read = uart6850_end_read, - .kick = uart6850_kick, - .command = uart6850_command, - .buffer_status = uart6850_buffer_status -}; - - -static void __init attach_uart6850(struct address_info *hw_config) -{ - int ok, timeout; - unsigned long flags; - - if (!uart6850_detected) - return; - - if ((my_dev = sound_alloc_mididev()) == -1) - { - printk(KERN_INFO "uart6850: Too many midi devices detected\n"); - return; - } - uart6850_base = hw_config->io_base; - uart6850_osp = hw_config->osp; - uart6850_irq = hw_config->irq; - - spin_lock_irqsave(&lock,flags); - - for (timeout = 30000; timeout > 0 && !output_ready(); timeout--); /* - * Wait - */ - uart6850_cmd(UART_MODE_ON); - ok = 1; - spin_unlock_irqrestore(&lock,flags); - - conf_printf("6850 Midi Interface", hw_config); - - std_midi_synth.midi_dev = my_dev; - hw_config->slots[4] = my_dev; - midi_devs[my_dev] = &uart6850_operations; - sequencer_init(); -} - -static inline int reset_uart6850(void) -{ - uart6850_read(); - return 1; /* - * OK - */ -} - -static int __init probe_uart6850(struct address_info *hw_config) -{ - int ok; - - uart6850_osp = hw_config->osp; - uart6850_base = hw_config->io_base; - uart6850_irq = hw_config->irq; - - if (request_irq(uart6850_irq, m6850intr, 0, "MIDI6850", NULL) < 0) - return 0; - - ok = reset_uart6850(); - uart6850_detected = ok; - return ok; -} - -static void __exit unload_uart6850(struct address_info *hw_config) -{ - free_irq(hw_config->irq, NULL); - sound_unload_mididev(hw_config->slots[4]); -} - -static struct address_info cfg_mpu; - -static int __initdata io = -1; -static int __initdata irq = -1; - -module_param_hw(io, int, ioport, 0); -module_param_hw(irq, int, irq, 0); - -static int __init init_uart6850(void) -{ - cfg_mpu.io_base = io; - cfg_mpu.irq = irq; - - if (cfg_mpu.io_base == -1 || cfg_mpu.irq == -1) { - printk(KERN_INFO "uart6850: irq and io must be set.\n"); - return -EINVAL; - } - - if (probe_uart6850(&cfg_mpu)) - return -ENODEV; - attach_uart6850(&cfg_mpu); - - return 0; -} - -static void __exit cleanup_uart6850(void) -{ - unload_uart6850(&cfg_mpu); -} - -module_init(init_uart6850); -module_exit(cleanup_uart6850); - -#ifndef MODULE -static int __init setup_uart6850(char *str) -{ - /* io, irq */ - int ints[3]; - - str = get_options(str, ARRAY_SIZE(ints), ints); - - io = ints[1]; - irq = ints[2]; - - return 1; -} -__setup("uart6850=", setup_uart6850); -#endif -MODULE_LICENSE("GPL"); |
