diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/dsp56k.c |
Linux-2.6.12-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!
Diffstat (limited to 'drivers/char/dsp56k.c')
-rw-r--r-- | drivers/char/dsp56k.c | 547 |
1 files changed, 547 insertions, 0 deletions
diff --git a/drivers/char/dsp56k.c b/drivers/char/dsp56k.c new file mode 100644 index 00000000000..37d6649011a --- /dev/null +++ b/drivers/char/dsp56k.c @@ -0,0 +1,547 @@ +/* + * The DSP56001 Device Driver, saviour of the Free World(tm) + * + * Authors: Fredrik Noring <noring@nocrew.org> + * lars brinkhoff <lars@nocrew.org> + * Tomas Berndtsson <tomas@nocrew.org> + * + * First version May 1996 + * + * History: + * 97-01-29 Tomas Berndtsson, + * Integrated with Linux 2.1.21 kernel sources. + * 97-02-15 Tomas Berndtsson, + * Fixed for kernel 2.1.26 + * + * BUGS: + * Hmm... there must be something here :) + * + * Copyright (C) 1996,1997 Fredrik Noring, lars brinkhoff & Tomas Berndtsson + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/module.h> +#include <linux/slab.h> /* for kmalloc() and kfree() */ +#include <linux/sched.h> /* for struct wait_queue etc */ +#include <linux/major.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/delay.h> /* guess what */ +#include <linux/fs.h> +#include <linux/mm.h> +#include <linux/init.h> +#include <linux/devfs_fs_kernel.h> +#include <linux/smp_lock.h> +#include <linux/device.h> + +#include <asm/atarihw.h> +#include <asm/traps.h> +#include <asm/uaccess.h> /* For put_user and get_user */ + +#include <asm/dsp56k.h> + +/* minor devices */ +#define DSP56K_DEV_56001 0 /* The only device so far */ + +#define TIMEOUT 10 /* Host port timeout in number of tries */ +#define MAXIO 2048 /* Maximum number of words before sleep */ +#define DSP56K_MAX_BINARY_LENGTH (3*64*1024) + +#define DSP56K_TX_INT_ON dsp56k_host_interface.icr |= DSP56K_ICR_TREQ +#define DSP56K_RX_INT_ON dsp56k_host_interface.icr |= DSP56K_ICR_RREQ +#define DSP56K_TX_INT_OFF dsp56k_host_interface.icr &= ~DSP56K_ICR_TREQ +#define DSP56K_RX_INT_OFF dsp56k_host_interface.icr &= ~DSP56K_ICR_RREQ + +#define DSP56K_TRANSMIT (dsp56k_host_interface.isr & DSP56K_ISR_TXDE) +#define DSP56K_RECEIVE (dsp56k_host_interface.isr & DSP56K_ISR_RXDF) + +#define handshake(count, maxio, timeout, ENABLE, f) \ +{ \ + long i, t, m; \ + while (count > 0) { \ + m = min_t(unsigned long, count, maxio); \ + for (i = 0; i < m; i++) { \ + for (t = 0; t < timeout && !ENABLE; t++) \ + msleep(20); \ + if(!ENABLE) \ + return -EIO; \ + f; \ + } \ + count -= m; \ + if (m == maxio) msleep(20); \ + } \ +} + +#define tx_wait(n) \ +{ \ + int t; \ + for(t = 0; t < n && !DSP56K_TRANSMIT; t++) \ + msleep(10); \ + if(!DSP56K_TRANSMIT) { \ + return -EIO; \ + } \ +} + +#define rx_wait(n) \ +{ \ + int t; \ + for(t = 0; t < n && !DSP56K_RECEIVE; t++) \ + msleep(10); \ + if(!DSP56K_RECEIVE) { \ + return -EIO; \ + } \ +} + +/* DSP56001 bootstrap code */ +static char bootstrap[] = { + 0x0c, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x60, 0xf4, 0x00, 0x00, 0x00, 0x4f, 0x61, 0xf4, + 0x00, 0x00, 0x7e, 0xa9, 0x06, 0x2e, 0x80, 0x00, 0x00, 0x47, + 0x07, 0xd8, 0x84, 0x07, 0x59, 0x84, 0x08, 0xf4, 0xa8, 0x00, + 0x00, 0x04, 0x08, 0xf4, 0xbf, 0x00, 0x0c, 0x00, 0x00, 0xfe, + 0xb8, 0x0a, 0xf0, 0x80, 0x00, 0x7e, 0xa9, 0x08, 0xf4, 0xa0, + 0x00, 0x00, 0x01, 0x08, 0xf4, 0xbe, 0x00, 0x00, 0x00, 0x0a, + 0xa9, 0x80, 0x00, 0x7e, 0xad, 0x08, 0x4e, 0x2b, 0x44, 0xf4, + 0x00, 0x00, 0x00, 0x03, 0x44, 0xf4, 0x45, 0x00, 0x00, 0x01, + 0x0e, 0xa0, 0x00, 0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xb5, 0x08, + 0x50, 0x2b, 0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xb8, 0x08, 0x46, + 0x2b, 0x44, 0xf4, 0x45, 0x00, 0x00, 0x02, 0x0a, 0xf0, 0xaa, + 0x00, 0x7e, 0xc9, 0x20, 0x00, 0x45, 0x0a, 0xf0, 0xaa, 0x00, + 0x7e, 0xd0, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xc6, 0x0a, 0xa9, + 0x80, 0x00, 0x7e, 0xc4, 0x08, 0x58, 0x6b, 0x0a, 0xf0, 0x80, + 0x00, 0x7e, 0xad, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xcd, 0x0a, + 0xa9, 0x80, 0x00, 0x7e, 0xcb, 0x08, 0x58, 0xab, 0x0a, 0xf0, + 0x80, 0x00, 0x7e, 0xad, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xd4, + 0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xd2, 0x08, 0x58, 0xeb, 0x0a, + 0xf0, 0x80, 0x00, 0x7e, 0xad}; +static int sizeof_bootstrap = 375; + + +static struct dsp56k_device { + long in_use; + long maxio, timeout; + int tx_wsize, rx_wsize; +} dsp56k; + +static struct class_simple *dsp56k_class; + +static int dsp56k_reset(void) +{ + u_char status; + + /* Power down the DSP */ + sound_ym.rd_data_reg_sel = 14; + status = sound_ym.rd_data_reg_sel & 0xef; + sound_ym.wd_data = status; + sound_ym.wd_data = status | 0x10; + + udelay(10); + + /* Power up the DSP */ + sound_ym.rd_data_reg_sel = 14; + sound_ym.wd_data = sound_ym.rd_data_reg_sel & 0xef; + + return 0; +} + +static int dsp56k_upload(u_char *bin, int len) +{ + int i; + u_char *p; + + dsp56k_reset(); + + p = bootstrap; + for (i = 0; i < sizeof_bootstrap/3; i++) { + /* tx_wait(10); */ + dsp56k_host_interface.data.b[1] = *p++; + dsp56k_host_interface.data.b[2] = *p++; + dsp56k_host_interface.data.b[3] = *p++; + } + for (; i < 512; i++) { + /* tx_wait(10); */ + dsp56k_host_interface.data.b[1] = 0; + dsp56k_host_interface.data.b[2] = 0; + dsp56k_host_interface.data.b[3] = 0; + } + + for (i = 0; i < len; i++) { + tx_wait(10); + get_user(dsp56k_host_interface.data.b[1], bin++); + get_user(dsp56k_host_interface.data.b[2], bin++); + get_user(dsp56k_host_interface.data.b[3], bin++); + } + + tx_wait(10); + dsp56k_host_interface.data.l = 3; /* Magic execute */ + + return 0; +} + +static ssize_t dsp56k_read(struct file *file, char *buf, size_t count, + loff_t *ppos) +{ + struct inode *inode = file->f_dentry->d_inode; + int dev = iminor(inode) & 0x0f; + + switch(dev) + { + case DSP56K_DEV_56001: + { + + long n; + + /* Don't do anything if nothing is to be done */ + if (!count) return 0; + + n = 0; + switch (dsp56k.rx_wsize) { + case 1: /* 8 bit */ + { + handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, + put_user(dsp56k_host_interface.data.b[3], buf+n++)); + return n; + } + case 2: /* 16 bit */ + { + short *data; + + count /= 2; + data = (short*) buf; + handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, + put_user(dsp56k_host_interface.data.w[1], data+n++)); + return 2*n; + } + case 3: /* 24 bit */ + { + count /= 3; + handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, + put_user(dsp56k_host_interface.data.b[1], buf+n++); + put_user(dsp56k_host_interface.data.b[2], buf+n++); + put_user(dsp56k_host_interface.data.b[3], buf+n++)); + return 3*n; + } + case 4: /* 32 bit */ + { + long *data; + + count /= 4; + data = (long*) buf; + handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, + put_user(dsp56k_host_interface.data.l, data+n++)); + return 4*n; + } + } + return -EFAULT; + } + + default: + printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); + return -ENXIO; + } +} + +static ssize_t dsp56k_write(struct file *file, const char *buf, size_t count, + loff_t *ppos) +{ + struct inode *inode = file->f_dentry->d_inode; + int dev = iminor(inode) & 0x0f; + + switch(dev) + { + case DSP56K_DEV_56001: + { + long n; + + /* Don't do anything if nothing is to be done */ + if (!count) return 0; + + n = 0; + switch (dsp56k.tx_wsize) { + case 1: /* 8 bit */ + { + handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, + get_user(dsp56k_host_interface.data.b[3], buf+n++)); + return n; + } + case 2: /* 16 bit */ + { + const short *data; + + count /= 2; + data = (const short *)buf; + handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, + get_user(dsp56k_host_interface.data.w[1], data+n++)); + return 2*n; + } + case 3: /* 24 bit */ + { + count /= 3; + handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, + get_user(dsp56k_host_interface.data.b[1], buf+n++); + get_user(dsp56k_host_interface.data.b[2], buf+n++); + get_user(dsp56k_host_interface.data.b[3], buf+n++)); + return 3*n; + } + case 4: /* 32 bit */ + { + const long *data; + + count /= 4; + data = (const long *)buf; + handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, + get_user(dsp56k_host_interface.data.l, data+n++)); + return 4*n; + } + } + + return -EFAULT; + } + default: + printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); + return -ENXIO; + } +} + +static int dsp56k_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + int dev = iminor(inode) & 0x0f; + + switch(dev) + { + case DSP56K_DEV_56001: + + switch(cmd) { + case DSP56K_UPLOAD: + { + char *bin; + int r, len; + struct dsp56k_upload *binary = (struct dsp56k_upload *) arg; + + if(get_user(len, &binary->len) < 0) + return -EFAULT; + if(get_user(bin, &binary->bin) < 0) + return -EFAULT; + + if (len == 0) { + return -EINVAL; /* nothing to upload?!? */ + } + if (len > DSP56K_MAX_BINARY_LENGTH) { + return -EINVAL; + } + + r = dsp56k_upload(bin, len); + if (r < 0) { + return r; + } + + break; + } + case DSP56K_SET_TX_WSIZE: + if (arg > 4 || arg < 1) + return -EINVAL; + dsp56k.tx_wsize = (int) arg; + break; + case DSP56K_SET_RX_WSIZE: + if (arg > 4 || arg < 1) + return -EINVAL; + dsp56k.rx_wsize = (int) arg; + break; + case DSP56K_HOST_FLAGS: + { + int dir, out, status; + struct dsp56k_host_flags *hf = (struct dsp56k_host_flags*) arg; + + if(get_user(dir, &hf->dir) < 0) + return -EFAULT; + if(get_user(out, &hf->out) < 0) + return -EFAULT; + + if ((dir & 0x1) && (out & 0x1)) + dsp56k_host_interface.icr |= DSP56K_ICR_HF0; + else if (dir & 0x1) + dsp56k_host_interface.icr &= ~DSP56K_ICR_HF0; + if ((dir & 0x2) && (out & 0x2)) + dsp56k_host_interface.icr |= DSP56K_ICR_HF1; + else if (dir & 0x2) + dsp56k_host_interface.icr &= ~DSP56K_ICR_HF1; + + status = 0; + if (dsp56k_host_interface.icr & DSP56K_ICR_HF0) status |= 0x1; + if (dsp56k_host_interface.icr & DSP56K_ICR_HF1) status |= 0x2; + if (dsp56k_host_interface.isr & DSP56K_ISR_HF2) status |= 0x4; + if (dsp56k_host_interface.isr & DSP56K_ISR_HF3) status |= 0x8; + + return put_user(status, &hf->status); + } + case DSP56K_HOST_CMD: + if (arg > 31 || arg < 0) + return -EINVAL; + dsp56k_host_interface.cvr = (u_char)((arg & DSP56K_CVR_HV_MASK) | + DSP56K_CVR_HC); + break; + default: + return -EINVAL; + } + return 0; + + default: + printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); + return -ENXIO; + } +} + +/* As of 2.1.26 this should be dsp56k_poll, + * but how do I then check device minor number? + * Do I need this function at all??? + */ +#if 0 +static unsigned int dsp56k_poll(struct file *file, poll_table *wait) +{ + int dev = iminor(file->f_dentry->d_inode) & 0x0f; + + switch(dev) + { + case DSP56K_DEV_56001: + /* poll_wait(file, ???, wait); */ + return POLLIN | POLLRDNORM | POLLOUT; + + default: + printk("DSP56k driver: Unknown minor device: %d\n", dev); + return 0; + } +} +#endif + +static int dsp56k_open(struct inode *inode, struct file *file) +{ + int dev = iminor(inode) & 0x0f; + + switch(dev) + { + case DSP56K_DEV_56001: + + if (test_and_set_bit(0, &dsp56k.in_use)) + return -EBUSY; + + dsp56k.timeout = TIMEOUT; + dsp56k.maxio = MAXIO; + dsp56k.rx_wsize = dsp56k.tx_wsize = 4; + + DSP56K_TX_INT_OFF; + DSP56K_RX_INT_OFF; + + /* Zero host flags */ + dsp56k_host_interface.icr &= ~DSP56K_ICR_HF0; + dsp56k_host_interface.icr &= ~DSP56K_ICR_HF1; + + break; + + default: + return -ENODEV; + } + + return 0; +} + +static int dsp56k_release(struct inode *inode, struct file *file) +{ + int dev = iminor(inode) & 0x0f; + + switch(dev) + { + case DSP56K_DEV_56001: + clear_bit(0, &dsp56k.in_use); + break; + default: + printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); + return -ENXIO; + } + + return 0; +} + +static struct file_operations dsp56k_fops = { + .owner = THIS_MODULE, + .read = dsp56k_read, + .write = dsp56k_write, + .ioctl = dsp56k_ioctl, + .open = dsp56k_open, + .release = dsp56k_release, +}; + + +/****** Init and module functions ******/ + +static char banner[] __initdata = KERN_INFO "DSP56k driver installed\n"; + +static int __init dsp56k_init_driver(void) +{ + int err = 0; + + if(!MACH_IS_ATARI || !ATARIHW_PRESENT(DSP56K)) { + printk("DSP56k driver: Hardware not present\n"); + return -ENODEV; + } + + if(register_chrdev(DSP56K_MAJOR, "dsp56k", &dsp56k_fops)) { + printk("DSP56k driver: Unable to register driver\n"); + return -ENODEV; + } + dsp56k_class = class_simple_create(THIS_MODULE, "dsp56k"); + if (IS_ERR(dsp56k_class)) { + err = PTR_ERR(dsp56k_class); + goto out_chrdev; + } + class_simple_device_add(dsp56k_class, MKDEV(DSP56K_MAJOR, 0), NULL, "dsp56k"); + + err = devfs_mk_cdev(MKDEV(DSP56K_MAJOR, 0), + S_IFCHR | S_IRUSR | S_IWUSR, "dsp56k"); + if(err) + goto out_class; + + printk(banner); + goto out; + +out_class: + class_simple_device_remove(MKDEV(DSP56K_MAJOR, 0)); + class_simple_destroy(dsp56k_class); +out_chrdev: + unregister_chrdev(DSP56K_MAJOR, "dsp56k"); +out: + return err; +} +module_init(dsp56k_init_driver); + +static void __exit dsp56k_cleanup_driver(void) +{ + class_simple_device_remove(MKDEV(DSP56K_MAJOR, 0)); + class_simple_destroy(dsp56k_class); + unregister_chrdev(DSP56K_MAJOR, "dsp56k"); + devfs_remove("dsp56k"); +} +module_exit(dsp56k_cleanup_driver); + +MODULE_LICENSE("GPL"); |