Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 481 insertions, 0 deletions

diff --git a/sound/oss/uart401.c b/sound/oss/uart401.c
new file mode 100644
index 000000000000..a3d75baf6df8
--- /dev/null
+++ b/sound/oss/uart401.c
@@ -0,0 +1,481 @@
+/*
+ * sound/uart401.c
+ *
+ * MPU-401 UART driver (formerly uart401_midi.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.
+ *
+ * Changes:
+ *      Alan Cox                Reformatted, removed sound_mem usage, use normal Linux
+ *                              interrupt allocation. Protect against bogus unload
+ *                              Fixed to allow IRQ > 15
+ *      Christoph Hellwig       Adapted to module_init/module_exit
+ *      Arnaldo C. de Melo      got rid of check_region
+ *
+ * Status:
+ *              Untested
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include "sound_config.h"
+
+#include "mpu401.h"
+
+typedef struct uart401_devc
+{
+        int             base;
+        int             irq;
+        int            *osp;
+        void            (*midi_input_intr) (int dev, unsigned char data);
+        int             opened, disabled;
+        volatile unsigned char input_byte;
+        int             my_dev;
+        int             share_irq;
+        spinlock_t      lock;
+}
+uart401_devc;
+
+#define DATAPORT   (devc->base)
+#define COMDPORT   (devc->base+1)
+#define STATPORT   (devc->base+1)
+
+static int uart401_status(uart401_devc * devc)
+{
+        return inb(STATPORT);
+}
+
+#define input_avail(devc) (!(uart401_status(devc)&INPUT_AVAIL))
+#define output_ready(devc)      (!(uart401_status(devc)&OUTPUT_READY))
+
+static void uart401_cmd(uart401_devc * devc, unsigned char cmd)
+{
+        outb((cmd), COMDPORT);
+}
+
+static int uart401_read(uart401_devc * devc)
+{
+        return inb(DATAPORT);
+}
+
+static void uart401_write(uart401_devc * devc, unsigned char byte)
+{
+        outb((byte), DATAPORT);
+}
+
+#define OUTPUT_READY    0x40
+#define INPUT_AVAIL     0x80
+#define MPU_ACK         0xFE
+#define MPU_RESET       0xFF
+#define UART_MODE_ON    0x3F
+
+static int      reset_uart401(uart401_devc * devc);
+static void     enter_uart_mode(uart401_devc * devc);
+
+static void uart401_input_loop(uart401_devc * devc)
+{
+        int work_limit=30000;
+        
+        while (input_avail(devc) && --work_limit)
+        {
+                unsigned char   c = uart401_read(devc);
+
+                if (c == MPU_ACK)
+                        devc->input_byte = c;
+                else if (devc->opened & OPEN_READ && devc->midi_input_intr)
+                        devc->midi_input_intr(devc->my_dev, c);
+        }
+        if(work_limit==0)
+                printk(KERN_WARNING "Too much work in interrupt on uart401 (0x%X). UART jabbering ??\n", devc->base);
+}
+
+irqreturn_t uart401intr(int irq, void *dev_id, struct pt_regs *dummy)
+{
+        uart401_devc *devc = dev_id;
+
+        if (devc == NULL)
+        {
+                printk(KERN_ERR "uart401: bad devc\n");
+                return IRQ_NONE;
+        }
+
+        if (input_avail(devc))
+                uart401_input_loop(devc);
+        return IRQ_HANDLED;
+}
+
+static int
+uart401_open(int dev, int mode,
+             void            (*input) (int dev, unsigned char data),
+             void            (*output) (int dev)
+)
+{
+        uart401_devc *devc = (uart401_devc *) midi_devs[dev]->devc;
+
+        if (devc->opened)
+                return -EBUSY;
+
+        /* Flush the UART */
+        
+        while (input_avail(devc))
+                uart401_read(devc);
+
+        devc->midi_input_intr = input;
+        devc->opened = mode;
+        enter_uart_mode(devc);
+        devc->disabled = 0;
+
+        return 0;
+}
+
+static void uart401_close(int dev)
+{
+        uart401_devc *devc = (uart401_devc *) midi_devs[dev]->devc;
+
+        reset_uart401(devc);
+        devc->opened = 0;
+}
+
+static int uart401_out(int dev, unsigned char midi_byte)
+{
+        int timeout;
+        unsigned long flags;
+        uart401_devc *devc = (uart401_devc *) midi_devs[dev]->devc;
+
+        if (devc->disabled)
+                return 1;
+        /*
+         * Test for input since pending input seems to block the output.
+         */
+
+        spin_lock_irqsave(&devc->lock,flags);   
+        if (input_avail(devc))
+                uart401_input_loop(devc);
+
+        spin_unlock_irqrestore(&devc->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(devc); timeout--);
+
+        if (!output_ready(devc))
+        {
+                  printk(KERN_WARNING "uart401: Timeout - Device not responding\n");
+                  devc->disabled = 1;
+                  reset_uart401(devc);
+                  enter_uart_mode(devc);
+                  return 1;
+        }
+        uart401_write(devc, midi_byte);
+        return 1;
+}
+
+static inline int uart401_start_read(int dev)
+{
+        return 0;
+}
+
+static inline int uart401_end_read(int dev)
+{
+        return 0;
+}
+
+static inline void uart401_kick(int dev)
+{
+}
+
+static inline int uart401_buffer_status(int dev)
+{
+        return 0;
+}
+
+#define MIDI_SYNTH_NAME "MPU-401 UART"
+#define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT
+#include "midi_synth.h"
+
+static const struct midi_operations uart401_operations =
+{
+        .owner          = THIS_MODULE,
+        .info           = {"MPU-401 (UART) MIDI", 0, 0, SNDCARD_MPU401},
+        .converter      = &std_midi_synth,
+        .in_info        = {0},
+        .open           = uart401_open,
+        .close          = uart401_close,
+        .outputc        = uart401_out,
+        .start_read     = uart401_start_read,
+        .end_read       = uart401_end_read,
+        .kick           = uart401_kick,
+        .buffer_status  = uart401_buffer_status,
+};
+
+static void enter_uart_mode(uart401_devc * devc)
+{
+        int ok, timeout;
+        unsigned long flags;
+
+        spin_lock_irqsave(&devc->lock,flags);   
+        for (timeout = 30000; timeout > 0 && !output_ready(devc); timeout--);
+
+        devc->input_byte = 0;
+        uart401_cmd(devc, UART_MODE_ON);
+
+        ok = 0;
+        for (timeout = 50000; timeout > 0 && !ok; timeout--)
+                if (devc->input_byte == MPU_ACK)
+                        ok = 1;
+                else if (input_avail(devc))
+                        if (uart401_read(devc) == MPU_ACK)
+                                ok = 1;
+
+        spin_unlock_irqrestore(&devc->lock,flags);
+}
+
+static int reset_uart401(uart401_devc * devc)
+{
+        int ok, timeout, n;
+
+        /*
+         * Send the RESET command. Try again if no success at the first time.
+         */
+
+        ok = 0;
+
+        for (n = 0; n < 2 && !ok; n++)
+        {
+                for (timeout = 30000; timeout > 0 && !output_ready(devc); timeout--);
+                devc->input_byte = 0;
+                uart401_cmd(devc, MPU_RESET);
+
+                /*
+                 * Wait at least 25 msec. This method is not accurate so let's make the
+                 * loop bit longer. Cannot sleep since this is called during boot.
+                 */
+
+                for (timeout = 50000; timeout > 0 && !ok; timeout--)
+                {
+                        if (devc->input_byte == MPU_ACK)        /* Interrupt */
+                                ok = 1;
+                        else if (input_avail(devc))
+                        {
+                                if (uart401_read(devc) == MPU_ACK)
+                                        ok = 1;
+                        }
+                }
+        }
+
+
+        if (ok)
+        {
+                DEB(printk("Reset UART401 OK\n"));
+        }
+        else
+                DDB(printk("Reset UART401 failed - No hardware detected.\n"));
+
+        if (ok)
+                uart401_input_loop(devc);       /*
+                                                 * Flush input before enabling interrupts
+                                                 */
+
+        return ok;
+}
+
+int probe_uart401(struct address_info *hw_config, struct module *owner)
+{
+        uart401_devc *devc;
+        char *name = "MPU-401 (UART) MIDI";
+        int ok = 0;
+        unsigned long flags;
+
+        DDB(printk("Entered probe_uart401()\n"));
+
+        /* Default to "not found" */
+        hw_config->slots[4] = -1;
+
+        if (!request_region(hw_config->io_base, 4, "MPU-401 UART")) {
+                printk(KERN_INFO "uart401: could not request_region(%d, 4)\n", hw_config->io_base);
+                return 0;
+        }
+
+        devc = kmalloc(sizeof(uart401_devc), GFP_KERNEL);
+        if (!devc) {
+                printk(KERN_WARNING "uart401: Can't allocate memory\n");
+                goto cleanup_region;
+        }
+
+        devc->base = hw_config->io_base;
+        devc->irq = hw_config->irq;
+        devc->osp = hw_config->osp;
+        devc->midi_input_intr = NULL;
+        devc->opened = 0;
+        devc->input_byte = 0;
+        devc->my_dev = 0;
+        devc->share_irq = 0;
+        spin_lock_init(&devc->lock);
+
+        spin_lock_irqsave(&devc->lock,flags);   
+        ok = reset_uart401(devc);
+        spin_unlock_irqrestore(&devc->lock,flags);
+
+        if (!ok)
+                goto cleanup_devc;
+
+        if (hw_config->name)
+                name = hw_config->name;
+
+        if (devc->irq < 0) {
+                devc->share_irq = 1;
+                devc->irq *= -1;
+        } else
+                devc->share_irq = 0;
+
+        if (!devc->share_irq)
+                if (request_irq(devc->irq, uart401intr, 0, "MPU-401 UART", devc) < 0) {
+                        printk(KERN_WARNING "uart401: Failed to allocate IRQ%d\n", devc->irq);
+                        devc->share_irq = 1;
+                }
+        devc->my_dev = sound_alloc_mididev();
+        enter_uart_mode(devc);
+
+        if (devc->my_dev == -1) {
+                printk(KERN_INFO "uart401: Too many midi devices detected\n");
+                goto cleanup_irq;
+        }
+        conf_printf(name, hw_config);
+        midi_devs[devc->my_dev] = kmalloc(sizeof(struct midi_operations), GFP_KERNEL);
+        if (!midi_devs[devc->my_dev]) {
+                printk(KERN_ERR "uart401: Failed to allocate memory\n");
+                goto cleanup_unload_mididev;
+        }
+        memcpy(midi_devs[devc->my_dev], &uart401_operations, sizeof(struct midi_operations));
+
+        if (owner)
+                midi_devs[devc->my_dev]->owner = owner;
+        
+        midi_devs[devc->my_dev]->devc = devc;
+        midi_devs[devc->my_dev]->converter = kmalloc(sizeof(struct synth_operations), GFP_KERNEL);
+        if (!midi_devs[devc->my_dev]->converter) {
+                printk(KERN_WARNING "uart401: Failed to allocate memory\n");
+                goto cleanup_midi_devs;
+        }
+        memcpy(midi_devs[devc->my_dev]->converter, &std_midi_synth, sizeof(struct synth_operations));
+        strcpy(midi_devs[devc->my_dev]->info.name, name);
+        midi_devs[devc->my_dev]->converter->id = "UART401";
+        midi_devs[devc->my_dev]->converter->midi_dev = devc->my_dev;
+
+        if (owner)
+                midi_devs[devc->my_dev]->converter->owner = owner;
+
+        hw_config->slots[4] = devc->my_dev;
+        sequencer_init();
+        devc->opened = 0;
+        return 1;
+cleanup_midi_devs:
+        kfree(midi_devs[devc->my_dev]);
+cleanup_unload_mididev:
+        sound_unload_mididev(devc->my_dev);
+cleanup_irq:
+        if (!devc->share_irq)
+                free_irq(devc->irq, devc);
+cleanup_devc:
+        kfree(devc);
+cleanup_region:
+        release_region(hw_config->io_base, 4);
+        return 0;
+}
+
+void unload_uart401(struct address_info *hw_config)
+{
+        uart401_devc *devc;
+        int n=hw_config->slots[4];
+        
+        /* Not set up */
+        if(n==-1 || midi_devs[n]==NULL)
+                return;
+                
+        /* Not allocated (erm ??) */
+        
+        devc = midi_devs[hw_config->slots[4]]->devc;
+        if (devc == NULL)
+                return;
+
+        reset_uart401(devc);
+        release_region(hw_config->io_base, 4);
+
+        if (!devc->share_irq)
+                free_irq(devc->irq, devc);
+        if (devc)
+        {
+                kfree(midi_devs[devc->my_dev]->converter);
+                kfree(midi_devs[devc->my_dev]);
+                kfree(devc);
+                devc = NULL;
+        }
+        /* This kills midi_devs[x] */
+        sound_unload_mididev(hw_config->slots[4]);
+}
+
+EXPORT_SYMBOL(probe_uart401);
+EXPORT_SYMBOL(unload_uart401);
+EXPORT_SYMBOL(uart401intr);
+
+static struct address_info cfg_mpu;
+
+static int io = -1;
+static int irq = -1;
+
+module_param(io, int, 0444);
+module_param(irq, int, 0444);
+
+
+static int __init init_uart401(void)
+{
+        cfg_mpu.irq = irq;
+        cfg_mpu.io_base = io;
+
+        /* Can be loaded either for module use or to provide functions
+           to others */
+        if (cfg_mpu.io_base != -1 && cfg_mpu.irq != -1) {
+                printk(KERN_INFO "MPU-401 UART driver Copyright (C) Hannu Savolainen 1993-1997");
+                if (!probe_uart401(&cfg_mpu, THIS_MODULE))
+                        return -ENODEV;
+        }
+
+        return 0;
+}
+
+static void __exit cleanup_uart401(void)
+{
+        if (cfg_mpu.io_base != -1 && cfg_mpu.irq != -1)
+                unload_uart401(&cfg_mpu);
+}
+
+module_init(init_uart401);
+module_exit(cleanup_uart401);
+
+#ifndef MODULE
+static int __init setup_uart401(char *str)
+{
+        /* io, irq */
+        int ints[3];
+        
+        str = get_options(str, ARRAY_SIZE(ints), ints);
+
+        io = ints[1];
+        irq = ints[2];
+        
+        return 1;
+}
+
+__setup("uart401=", setup_uart401);
+#endif
+MODULE_LICENSE("GPL");