Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * The DSP56001 Device Driver, saviour of the Free World(tm) |
| 3 | * |
| 4 | * Authors: Fredrik Noring <noring@nocrew.org> |
| 5 | * lars brinkhoff <lars@nocrew.org> |
| 6 | * Tomas Berndtsson <tomas@nocrew.org> |
| 7 | * |
| 8 | * First version May 1996 |
| 9 | * |
| 10 | * History: |
| 11 | * 97-01-29 Tomas Berndtsson, |
| 12 | * Integrated with Linux 2.1.21 kernel sources. |
| 13 | * 97-02-15 Tomas Berndtsson, |
| 14 | * Fixed for kernel 2.1.26 |
| 15 | * |
| 16 | * BUGS: |
| 17 | * Hmm... there must be something here :) |
| 18 | * |
| 19 | * Copyright (C) 1996,1997 Fredrik Noring, lars brinkhoff & Tomas Berndtsson |
| 20 | * |
| 21 | * This file is subject to the terms and conditions of the GNU General Public |
| 22 | * License. See the file COPYING in the main directory of this archive |
| 23 | * for more details. |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/slab.h> /* for kmalloc() and kfree() */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/major.h> |
| 29 | #include <linux/types.h> |
| 30 | #include <linux/errno.h> |
| 31 | #include <linux/delay.h> /* guess what */ |
| 32 | #include <linux/fs.h> |
| 33 | #include <linux/mm.h> |
| 34 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/device.h> |
Jonathan Corbet | 65f37b7 | 2008-05-16 13:57:31 -0600 | [diff] [blame] | 36 | #include <linux/smp_lock.h> |
Jaswinder Singh | 7f127d5 | 2008-07-05 15:28:30 +0530 | [diff] [blame] | 37 | #include <linux/firmware.h> |
| 38 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | #include <asm/atarihw.h> |
| 41 | #include <asm/traps.h> |
| 42 | #include <asm/uaccess.h> /* For put_user and get_user */ |
| 43 | |
| 44 | #include <asm/dsp56k.h> |
| 45 | |
| 46 | /* minor devices */ |
| 47 | #define DSP56K_DEV_56001 0 /* The only device so far */ |
| 48 | |
| 49 | #define TIMEOUT 10 /* Host port timeout in number of tries */ |
| 50 | #define MAXIO 2048 /* Maximum number of words before sleep */ |
| 51 | #define DSP56K_MAX_BINARY_LENGTH (3*64*1024) |
| 52 | |
| 53 | #define DSP56K_TX_INT_ON dsp56k_host_interface.icr |= DSP56K_ICR_TREQ |
| 54 | #define DSP56K_RX_INT_ON dsp56k_host_interface.icr |= DSP56K_ICR_RREQ |
| 55 | #define DSP56K_TX_INT_OFF dsp56k_host_interface.icr &= ~DSP56K_ICR_TREQ |
| 56 | #define DSP56K_RX_INT_OFF dsp56k_host_interface.icr &= ~DSP56K_ICR_RREQ |
| 57 | |
| 58 | #define DSP56K_TRANSMIT (dsp56k_host_interface.isr & DSP56K_ISR_TXDE) |
| 59 | #define DSP56K_RECEIVE (dsp56k_host_interface.isr & DSP56K_ISR_RXDF) |
| 60 | |
| 61 | #define handshake(count, maxio, timeout, ENABLE, f) \ |
| 62 | { \ |
| 63 | long i, t, m; \ |
| 64 | while (count > 0) { \ |
| 65 | m = min_t(unsigned long, count, maxio); \ |
| 66 | for (i = 0; i < m; i++) { \ |
| 67 | for (t = 0; t < timeout && !ENABLE; t++) \ |
| 68 | msleep(20); \ |
| 69 | if(!ENABLE) \ |
| 70 | return -EIO; \ |
| 71 | f; \ |
| 72 | } \ |
| 73 | count -= m; \ |
| 74 | if (m == maxio) msleep(20); \ |
| 75 | } \ |
| 76 | } |
| 77 | |
| 78 | #define tx_wait(n) \ |
| 79 | { \ |
| 80 | int t; \ |
| 81 | for(t = 0; t < n && !DSP56K_TRANSMIT; t++) \ |
| 82 | msleep(10); \ |
| 83 | if(!DSP56K_TRANSMIT) { \ |
| 84 | return -EIO; \ |
| 85 | } \ |
| 86 | } |
| 87 | |
| 88 | #define rx_wait(n) \ |
| 89 | { \ |
| 90 | int t; \ |
| 91 | for(t = 0; t < n && !DSP56K_RECEIVE; t++) \ |
| 92 | msleep(10); \ |
| 93 | if(!DSP56K_RECEIVE) { \ |
| 94 | return -EIO; \ |
| 95 | } \ |
| 96 | } |
| 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | static struct dsp56k_device { |
Al Viro | 64b3361 | 2007-10-14 19:35:20 +0100 | [diff] [blame] | 99 | unsigned long in_use; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | long maxio, timeout; |
| 101 | int tx_wsize, rx_wsize; |
| 102 | } dsp56k; |
| 103 | |
gregkh@suse.de | ca8eca6 | 2005-03-23 09:53:09 -0800 | [diff] [blame] | 104 | static struct class *dsp56k_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
| 106 | static int dsp56k_reset(void) |
| 107 | { |
| 108 | u_char status; |
| 109 | |
| 110 | /* Power down the DSP */ |
| 111 | sound_ym.rd_data_reg_sel = 14; |
| 112 | status = sound_ym.rd_data_reg_sel & 0xef; |
| 113 | sound_ym.wd_data = status; |
| 114 | sound_ym.wd_data = status | 0x10; |
| 115 | |
| 116 | udelay(10); |
| 117 | |
| 118 | /* Power up the DSP */ |
| 119 | sound_ym.rd_data_reg_sel = 14; |
| 120 | sound_ym.wd_data = sound_ym.rd_data_reg_sel & 0xef; |
| 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 125 | static int dsp56k_upload(u_char __user *bin, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | { |
Jaswinder Singh | 7f127d5 | 2008-07-05 15:28:30 +0530 | [diff] [blame] | 127 | struct platform_device *pdev; |
| 128 | const struct firmware *fw; |
| 129 | const char fw_name[] = "dsp56k/bootstrap.bin"; |
| 130 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | int i; |
Jaswinder Singh | 7f127d5 | 2008-07-05 15:28:30 +0530 | [diff] [blame] | 132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | dsp56k_reset(); |
Jaswinder Singh | 7f127d5 | 2008-07-05 15:28:30 +0530 | [diff] [blame] | 134 | |
| 135 | pdev = platform_device_register_simple("dsp56k", 0, NULL, 0); |
| 136 | if (IS_ERR(pdev)) { |
| 137 | printk(KERN_ERR "Failed to register device for \"%s\"\n", |
| 138 | fw_name); |
| 139 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | } |
Jaswinder Singh | 7f127d5 | 2008-07-05 15:28:30 +0530 | [diff] [blame] | 141 | err = request_firmware(&fw, fw_name, &pdev->dev); |
| 142 | platform_device_unregister(pdev); |
| 143 | if (err) { |
| 144 | printk(KERN_ERR "Failed to load image \"%s\" err %d\n", |
| 145 | fw_name, err); |
| 146 | return err; |
| 147 | } |
| 148 | if (fw->size % 3) { |
| 149 | printk(KERN_ERR "Bogus length %d in image \"%s\"\n", |
| 150 | fw->size, fw_name); |
| 151 | release_firmware(fw); |
| 152 | return -EINVAL; |
| 153 | } |
| 154 | for (i = 0; i < fw->size; i = i + 3) { |
| 155 | /* tx_wait(10); */ |
| 156 | dsp56k_host_interface.data.b[1] = fw->data[i]; |
| 157 | dsp56k_host_interface.data.b[2] = fw->data[i + 1]; |
| 158 | dsp56k_host_interface.data.b[3] = fw->data[i + 2]; |
| 159 | } |
| 160 | release_firmware(fw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | for (; i < 512; i++) { |
| 162 | /* tx_wait(10); */ |
| 163 | dsp56k_host_interface.data.b[1] = 0; |
| 164 | dsp56k_host_interface.data.b[2] = 0; |
| 165 | dsp56k_host_interface.data.b[3] = 0; |
| 166 | } |
| 167 | |
| 168 | for (i = 0; i < len; i++) { |
| 169 | tx_wait(10); |
| 170 | get_user(dsp56k_host_interface.data.b[1], bin++); |
| 171 | get_user(dsp56k_host_interface.data.b[2], bin++); |
| 172 | get_user(dsp56k_host_interface.data.b[3], bin++); |
| 173 | } |
| 174 | |
| 175 | tx_wait(10); |
| 176 | dsp56k_host_interface.data.l = 3; /* Magic execute */ |
| 177 | |
| 178 | return 0; |
| 179 | } |
| 180 | |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 181 | static ssize_t dsp56k_read(struct file *file, char __user *buf, size_t count, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | loff_t *ppos) |
| 183 | { |
Josef Sipek | a7113a9 | 2006-12-08 02:36:55 -0800 | [diff] [blame] | 184 | struct inode *inode = file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | int dev = iminor(inode) & 0x0f; |
| 186 | |
| 187 | switch(dev) |
| 188 | { |
| 189 | case DSP56K_DEV_56001: |
| 190 | { |
| 191 | |
| 192 | long n; |
| 193 | |
| 194 | /* Don't do anything if nothing is to be done */ |
| 195 | if (!count) return 0; |
| 196 | |
| 197 | n = 0; |
| 198 | switch (dsp56k.rx_wsize) { |
| 199 | case 1: /* 8 bit */ |
| 200 | { |
| 201 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, |
| 202 | put_user(dsp56k_host_interface.data.b[3], buf+n++)); |
| 203 | return n; |
| 204 | } |
| 205 | case 2: /* 16 bit */ |
| 206 | { |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 207 | short __user *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
| 209 | count /= 2; |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 210 | data = (short __user *) buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, |
| 212 | put_user(dsp56k_host_interface.data.w[1], data+n++)); |
| 213 | return 2*n; |
| 214 | } |
| 215 | case 3: /* 24 bit */ |
| 216 | { |
| 217 | count /= 3; |
| 218 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, |
| 219 | put_user(dsp56k_host_interface.data.b[1], buf+n++); |
| 220 | put_user(dsp56k_host_interface.data.b[2], buf+n++); |
| 221 | put_user(dsp56k_host_interface.data.b[3], buf+n++)); |
| 222 | return 3*n; |
| 223 | } |
| 224 | case 4: /* 32 bit */ |
| 225 | { |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 226 | long __user *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
| 228 | count /= 4; |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 229 | data = (long __user *) buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE, |
| 231 | put_user(dsp56k_host_interface.data.l, data+n++)); |
| 232 | return 4*n; |
| 233 | } |
| 234 | } |
| 235 | return -EFAULT; |
| 236 | } |
| 237 | |
| 238 | default: |
| 239 | printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); |
| 240 | return -ENXIO; |
| 241 | } |
| 242 | } |
| 243 | |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 244 | static ssize_t dsp56k_write(struct file *file, const char __user *buf, size_t count, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | loff_t *ppos) |
| 246 | { |
Josef Sipek | a7113a9 | 2006-12-08 02:36:55 -0800 | [diff] [blame] | 247 | struct inode *inode = file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | int dev = iminor(inode) & 0x0f; |
| 249 | |
| 250 | switch(dev) |
| 251 | { |
| 252 | case DSP56K_DEV_56001: |
| 253 | { |
| 254 | long n; |
| 255 | |
| 256 | /* Don't do anything if nothing is to be done */ |
| 257 | if (!count) return 0; |
| 258 | |
| 259 | n = 0; |
| 260 | switch (dsp56k.tx_wsize) { |
| 261 | case 1: /* 8 bit */ |
| 262 | { |
| 263 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, |
| 264 | get_user(dsp56k_host_interface.data.b[3], buf+n++)); |
| 265 | return n; |
| 266 | } |
| 267 | case 2: /* 16 bit */ |
| 268 | { |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 269 | const short __user *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | count /= 2; |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 272 | data = (const short __user *)buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, |
| 274 | get_user(dsp56k_host_interface.data.w[1], data+n++)); |
| 275 | return 2*n; |
| 276 | } |
| 277 | case 3: /* 24 bit */ |
| 278 | { |
| 279 | count /= 3; |
| 280 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, |
| 281 | get_user(dsp56k_host_interface.data.b[1], buf+n++); |
| 282 | get_user(dsp56k_host_interface.data.b[2], buf+n++); |
| 283 | get_user(dsp56k_host_interface.data.b[3], buf+n++)); |
| 284 | return 3*n; |
| 285 | } |
| 286 | case 4: /* 32 bit */ |
| 287 | { |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 288 | const long __user *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
| 290 | count /= 4; |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 291 | data = (const long __user *)buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT, |
| 293 | get_user(dsp56k_host_interface.data.l, data+n++)); |
| 294 | return 4*n; |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | return -EFAULT; |
| 299 | } |
| 300 | default: |
| 301 | printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); |
| 302 | return -ENXIO; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | static int dsp56k_ioctl(struct inode *inode, struct file *file, |
| 307 | unsigned int cmd, unsigned long arg) |
| 308 | { |
| 309 | int dev = iminor(inode) & 0x0f; |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 310 | void __user *argp = (void __user *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | |
| 312 | switch(dev) |
| 313 | { |
| 314 | case DSP56K_DEV_56001: |
| 315 | |
| 316 | switch(cmd) { |
| 317 | case DSP56K_UPLOAD: |
| 318 | { |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 319 | char __user *bin; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | int r, len; |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 321 | struct dsp56k_upload __user *binary = argp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
| 323 | if(get_user(len, &binary->len) < 0) |
| 324 | return -EFAULT; |
| 325 | if(get_user(bin, &binary->bin) < 0) |
| 326 | return -EFAULT; |
| 327 | |
| 328 | if (len == 0) { |
| 329 | return -EINVAL; /* nothing to upload?!? */ |
| 330 | } |
| 331 | if (len > DSP56K_MAX_BINARY_LENGTH) { |
| 332 | return -EINVAL; |
| 333 | } |
| 334 | |
| 335 | r = dsp56k_upload(bin, len); |
| 336 | if (r < 0) { |
| 337 | return r; |
| 338 | } |
| 339 | |
| 340 | break; |
| 341 | } |
| 342 | case DSP56K_SET_TX_WSIZE: |
| 343 | if (arg > 4 || arg < 1) |
| 344 | return -EINVAL; |
| 345 | dsp56k.tx_wsize = (int) arg; |
| 346 | break; |
| 347 | case DSP56K_SET_RX_WSIZE: |
| 348 | if (arg > 4 || arg < 1) |
| 349 | return -EINVAL; |
| 350 | dsp56k.rx_wsize = (int) arg; |
| 351 | break; |
| 352 | case DSP56K_HOST_FLAGS: |
| 353 | { |
| 354 | int dir, out, status; |
Al Viro | d85f689 | 2006-01-12 01:06:31 -0800 | [diff] [blame] | 355 | struct dsp56k_host_flags __user *hf = argp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
| 357 | if(get_user(dir, &hf->dir) < 0) |
| 358 | return -EFAULT; |
| 359 | if(get_user(out, &hf->out) < 0) |
| 360 | return -EFAULT; |
| 361 | |
| 362 | if ((dir & 0x1) && (out & 0x1)) |
| 363 | dsp56k_host_interface.icr |= DSP56K_ICR_HF0; |
| 364 | else if (dir & 0x1) |
| 365 | dsp56k_host_interface.icr &= ~DSP56K_ICR_HF0; |
| 366 | if ((dir & 0x2) && (out & 0x2)) |
| 367 | dsp56k_host_interface.icr |= DSP56K_ICR_HF1; |
| 368 | else if (dir & 0x2) |
| 369 | dsp56k_host_interface.icr &= ~DSP56K_ICR_HF1; |
| 370 | |
| 371 | status = 0; |
| 372 | if (dsp56k_host_interface.icr & DSP56K_ICR_HF0) status |= 0x1; |
| 373 | if (dsp56k_host_interface.icr & DSP56K_ICR_HF1) status |= 0x2; |
| 374 | if (dsp56k_host_interface.isr & DSP56K_ISR_HF2) status |= 0x4; |
| 375 | if (dsp56k_host_interface.isr & DSP56K_ISR_HF3) status |= 0x8; |
| 376 | |
| 377 | return put_user(status, &hf->status); |
| 378 | } |
| 379 | case DSP56K_HOST_CMD: |
| 380 | if (arg > 31 || arg < 0) |
| 381 | return -EINVAL; |
| 382 | dsp56k_host_interface.cvr = (u_char)((arg & DSP56K_CVR_HV_MASK) | |
| 383 | DSP56K_CVR_HC); |
| 384 | break; |
| 385 | default: |
| 386 | return -EINVAL; |
| 387 | } |
| 388 | return 0; |
| 389 | |
| 390 | default: |
| 391 | printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); |
| 392 | return -ENXIO; |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | /* As of 2.1.26 this should be dsp56k_poll, |
| 397 | * but how do I then check device minor number? |
| 398 | * Do I need this function at all??? |
| 399 | */ |
| 400 | #if 0 |
| 401 | static unsigned int dsp56k_poll(struct file *file, poll_table *wait) |
| 402 | { |
Josef Sipek | a7113a9 | 2006-12-08 02:36:55 -0800 | [diff] [blame] | 403 | int dev = iminor(file->f_path.dentry->d_inode) & 0x0f; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | |
| 405 | switch(dev) |
| 406 | { |
| 407 | case DSP56K_DEV_56001: |
| 408 | /* poll_wait(file, ???, wait); */ |
| 409 | return POLLIN | POLLRDNORM | POLLOUT; |
| 410 | |
| 411 | default: |
| 412 | printk("DSP56k driver: Unknown minor device: %d\n", dev); |
| 413 | return 0; |
| 414 | } |
| 415 | } |
| 416 | #endif |
| 417 | |
| 418 | static int dsp56k_open(struct inode *inode, struct file *file) |
| 419 | { |
| 420 | int dev = iminor(inode) & 0x0f; |
Jonathan Corbet | 65f37b7 | 2008-05-16 13:57:31 -0600 | [diff] [blame] | 421 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | |
Jonathan Corbet | 65f37b7 | 2008-05-16 13:57:31 -0600 | [diff] [blame] | 423 | lock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | switch(dev) |
| 425 | { |
| 426 | case DSP56K_DEV_56001: |
| 427 | |
Jonathan Corbet | 65f37b7 | 2008-05-16 13:57:31 -0600 | [diff] [blame] | 428 | if (test_and_set_bit(0, &dsp56k.in_use)) { |
| 429 | ret = -EBUSY; |
| 430 | goto out; |
| 431 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
| 433 | dsp56k.timeout = TIMEOUT; |
| 434 | dsp56k.maxio = MAXIO; |
| 435 | dsp56k.rx_wsize = dsp56k.tx_wsize = 4; |
| 436 | |
| 437 | DSP56K_TX_INT_OFF; |
| 438 | DSP56K_RX_INT_OFF; |
| 439 | |
| 440 | /* Zero host flags */ |
| 441 | dsp56k_host_interface.icr &= ~DSP56K_ICR_HF0; |
| 442 | dsp56k_host_interface.icr &= ~DSP56K_ICR_HF1; |
| 443 | |
| 444 | break; |
| 445 | |
| 446 | default: |
Jonathan Corbet | 65f37b7 | 2008-05-16 13:57:31 -0600 | [diff] [blame] | 447 | ret = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | } |
Jonathan Corbet | 65f37b7 | 2008-05-16 13:57:31 -0600 | [diff] [blame] | 449 | out: |
| 450 | unlock_kernel(); |
| 451 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | static int dsp56k_release(struct inode *inode, struct file *file) |
| 455 | { |
| 456 | int dev = iminor(inode) & 0x0f; |
| 457 | |
| 458 | switch(dev) |
| 459 | { |
| 460 | case DSP56K_DEV_56001: |
| 461 | clear_bit(0, &dsp56k.in_use); |
| 462 | break; |
| 463 | default: |
| 464 | printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev); |
| 465 | return -ENXIO; |
| 466 | } |
| 467 | |
| 468 | return 0; |
| 469 | } |
| 470 | |
Arjan van de Ven | 62322d2 | 2006-07-03 00:24:21 -0700 | [diff] [blame] | 471 | static const struct file_operations dsp56k_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | .owner = THIS_MODULE, |
| 473 | .read = dsp56k_read, |
| 474 | .write = dsp56k_write, |
| 475 | .ioctl = dsp56k_ioctl, |
| 476 | .open = dsp56k_open, |
| 477 | .release = dsp56k_release, |
| 478 | }; |
| 479 | |
| 480 | |
| 481 | /****** Init and module functions ******/ |
| 482 | |
| 483 | static char banner[] __initdata = KERN_INFO "DSP56k driver installed\n"; |
| 484 | |
| 485 | static int __init dsp56k_init_driver(void) |
| 486 | { |
| 487 | int err = 0; |
| 488 | |
| 489 | if(!MACH_IS_ATARI || !ATARIHW_PRESENT(DSP56K)) { |
| 490 | printk("DSP56k driver: Hardware not present\n"); |
| 491 | return -ENODEV; |
| 492 | } |
| 493 | |
| 494 | if(register_chrdev(DSP56K_MAJOR, "dsp56k", &dsp56k_fops)) { |
| 495 | printk("DSP56k driver: Unable to register driver\n"); |
| 496 | return -ENODEV; |
| 497 | } |
gregkh@suse.de | ca8eca6 | 2005-03-23 09:53:09 -0800 | [diff] [blame] | 498 | dsp56k_class = class_create(THIS_MODULE, "dsp56k"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | if (IS_ERR(dsp56k_class)) { |
| 500 | err = PTR_ERR(dsp56k_class); |
| 501 | goto out_chrdev; |
| 502 | } |
tonyj@suse.de | 07c015e | 2007-08-07 22:28:44 -0700 | [diff] [blame] | 503 | device_create(dsp56k_class, NULL, MKDEV(DSP56K_MAJOR, 0), "dsp56k"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | printk(banner); |
| 506 | goto out; |
| 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | out_chrdev: |
| 509 | unregister_chrdev(DSP56K_MAJOR, "dsp56k"); |
| 510 | out: |
| 511 | return err; |
| 512 | } |
| 513 | module_init(dsp56k_init_driver); |
| 514 | |
| 515 | static void __exit dsp56k_cleanup_driver(void) |
| 516 | { |
tonyj@suse.de | 07c015e | 2007-08-07 22:28:44 -0700 | [diff] [blame] | 517 | device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0)); |
gregkh@suse.de | ca8eca6 | 2005-03-23 09:53:09 -0800 | [diff] [blame] | 518 | class_destroy(dsp56k_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | unregister_chrdev(DSP56K_MAJOR, "dsp56k"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | } |
| 521 | module_exit(dsp56k_cleanup_driver); |
| 522 | |
| 523 | MODULE_LICENSE("GPL"); |
Jaswinder Singh | 7f127d5 | 2008-07-05 15:28:30 +0530 | [diff] [blame] | 524 | MODULE_FIRMWARE("dsp56k/bootstrap.bin"); |