Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* asm-sparc/floppy.h: Sparc specific parts of the Floppy driver. |
| 2 | * |
David S. Miller | 64d329e | 2007-10-27 00:17:01 -0700 | [diff] [blame] | 3 | * Copyright (C) 1995 David S. Miller (davem@davemloft.net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #ifndef __ASM_SPARC_FLOPPY_H |
| 7 | #define __ASM_SPARC_FLOPPY_H |
| 8 | |
| 9 | #include <asm/page.h> |
| 10 | #include <asm/pgtable.h> |
| 11 | #include <asm/system.h> |
| 12 | #include <asm/idprom.h> |
| 13 | #include <asm/machines.h> |
| 14 | #include <asm/oplib.h> |
| 15 | #include <asm/auxio.h> |
| 16 | #include <asm/irq.h> |
| 17 | |
| 18 | /* We don't need no stinkin' I/O port allocation crap. */ |
| 19 | #undef release_region |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #undef request_region |
| 21 | #define release_region(X, Y) do { } while(0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #define request_region(X, Y, Z) (1) |
| 23 | |
| 24 | /* References: |
| 25 | * 1) Netbsd Sun floppy driver. |
| 26 | * 2) NCR 82077 controller manual |
| 27 | * 3) Intel 82077 controller manual |
| 28 | */ |
| 29 | struct sun_flpy_controller { |
| 30 | volatile unsigned char status_82072; /* Main Status reg. */ |
| 31 | #define dcr_82072 status_82072 /* Digital Control reg. */ |
| 32 | #define status1_82077 status_82072 /* Auxiliary Status reg. 1 */ |
| 33 | |
| 34 | volatile unsigned char data_82072; /* Data fifo. */ |
| 35 | #define status2_82077 data_82072 /* Auxiliary Status reg. 2 */ |
| 36 | |
| 37 | volatile unsigned char dor_82077; /* Digital Output reg. */ |
| 38 | volatile unsigned char tapectl_82077; /* What the? Tape control reg? */ |
| 39 | |
| 40 | volatile unsigned char status_82077; /* Main Status Register. */ |
| 41 | #define drs_82077 status_82077 /* Digital Rate Select reg. */ |
| 42 | |
| 43 | volatile unsigned char data_82077; /* Data fifo. */ |
| 44 | volatile unsigned char ___unused; |
| 45 | volatile unsigned char dir_82077; /* Digital Input reg. */ |
| 46 | #define dcr_82077 dir_82077 /* Config Control reg. */ |
| 47 | }; |
| 48 | |
| 49 | /* You'll only ever find one controller on a SparcStation anyways. */ |
| 50 | static struct sun_flpy_controller *sun_fdc = NULL; |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 51 | extern volatile unsigned char *fdc_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | struct sun_floppy_ops { |
| 54 | unsigned char (*fd_inb)(int port); |
| 55 | void (*fd_outb)(unsigned char value, int port); |
| 56 | }; |
| 57 | |
| 58 | static struct sun_floppy_ops sun_fdops; |
| 59 | |
| 60 | #define fd_inb(port) sun_fdops.fd_inb(port) |
| 61 | #define fd_outb(value,port) sun_fdops.fd_outb(value,port) |
| 62 | #define fd_enable_dma() sun_fd_enable_dma() |
| 63 | #define fd_disable_dma() sun_fd_disable_dma() |
| 64 | #define fd_request_dma() (0) /* nothing... */ |
| 65 | #define fd_free_dma() /* nothing... */ |
| 66 | #define fd_clear_dma_ff() /* nothing... */ |
| 67 | #define fd_set_dma_mode(mode) sun_fd_set_dma_mode(mode) |
| 68 | #define fd_set_dma_addr(addr) sun_fd_set_dma_addr(addr) |
| 69 | #define fd_set_dma_count(count) sun_fd_set_dma_count(count) |
| 70 | #define fd_enable_irq() /* nothing... */ |
| 71 | #define fd_disable_irq() /* nothing... */ |
| 72 | #define fd_cacheflush(addr, size) /* nothing... */ |
| 73 | #define fd_request_irq() sun_fd_request_irq() |
| 74 | #define fd_free_irq() /* nothing... */ |
| 75 | #if 0 /* P3: added by Alain, these cause a MMU corruption. 19960524 XXX */ |
| 76 | #define fd_dma_mem_alloc(size) ((unsigned long) vmalloc(size)) |
| 77 | #define fd_dma_mem_free(addr,size) (vfree((void *)(addr))) |
| 78 | #endif |
| 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | /* XXX This isn't really correct. XXX */ |
| 81 | #define get_dma_residue(x) (0) |
| 82 | |
| 83 | #define FLOPPY0_TYPE 4 |
| 84 | #define FLOPPY1_TYPE 0 |
| 85 | |
| 86 | /* Super paranoid... */ |
| 87 | #undef HAVE_DISABLE_HLT |
| 88 | |
| 89 | /* Here is where we catch the floppy driver trying to initialize, |
| 90 | * therefore this is where we call the PROM device tree probing |
| 91 | * routine etc. on the Sparc. |
| 92 | */ |
| 93 | #define FDC1 sun_floppy_init() |
| 94 | |
| 95 | #define N_FDC 1 |
| 96 | #define N_DRIVE 8 |
| 97 | |
| 98 | /* No 64k boundary crossing problems on the Sparc. */ |
| 99 | #define CROSS_64KB(a,s) (0) |
| 100 | |
| 101 | /* Routines unique to each controller type on a Sun. */ |
Mark Fortescue | b65f075 | 2007-07-25 23:45:10 -0700 | [diff] [blame] | 102 | static void sun_set_dor(unsigned char value, int fdc_82077) |
| 103 | { |
| 104 | if (sparc_cpu_model == sun4c) { |
| 105 | unsigned int bits = 0; |
| 106 | if (value & 0x10) |
| 107 | bits |= AUXIO_FLPY_DSEL; |
| 108 | if ((value & 0x80) == 0) |
| 109 | bits |= AUXIO_FLPY_EJCT; |
| 110 | set_auxio(bits, (~bits) & (AUXIO_FLPY_DSEL|AUXIO_FLPY_EJCT)); |
| 111 | } |
| 112 | if (fdc_82077) { |
| 113 | sun_fdc->dor_82077 = value; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | static unsigned char sun_read_dir(void) |
| 118 | { |
| 119 | if (sparc_cpu_model == sun4c) |
| 120 | return (get_auxio() & AUXIO_FLPY_DCHG) ? 0x80 : 0; |
| 121 | else |
| 122 | return sun_fdc->dir_82077; |
| 123 | } |
| 124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | static unsigned char sun_82072_fd_inb(int port) |
| 126 | { |
| 127 | udelay(5); |
| 128 | switch(port & 7) { |
| 129 | default: |
| 130 | printk("floppy: Asked to read unknown port %d\n", port); |
| 131 | panic("floppy: Port bolixed."); |
| 132 | case 4: /* FD_STATUS */ |
| 133 | return sun_fdc->status_82072 & ~STATUS_DMA; |
| 134 | case 5: /* FD_DATA */ |
| 135 | return sun_fdc->data_82072; |
| 136 | case 7: /* FD_DIR */ |
Mark Fortescue | b65f075 | 2007-07-25 23:45:10 -0700 | [diff] [blame] | 137 | return sun_read_dir(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | }; |
| 139 | panic("sun_82072_fd_inb: How did I get here?"); |
| 140 | } |
| 141 | |
| 142 | static void sun_82072_fd_outb(unsigned char value, int port) |
| 143 | { |
| 144 | udelay(5); |
| 145 | switch(port & 7) { |
| 146 | default: |
| 147 | printk("floppy: Asked to write to unknown port %d\n", port); |
| 148 | panic("floppy: Port bolixed."); |
| 149 | case 2: /* FD_DOR */ |
Mark Fortescue | b65f075 | 2007-07-25 23:45:10 -0700 | [diff] [blame] | 150 | sun_set_dor(value, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | break; |
| 152 | case 5: /* FD_DATA */ |
| 153 | sun_fdc->data_82072 = value; |
| 154 | break; |
| 155 | case 7: /* FD_DCR */ |
| 156 | sun_fdc->dcr_82072 = value; |
| 157 | break; |
| 158 | case 4: /* FD_STATUS */ |
| 159 | sun_fdc->status_82072 = value; |
| 160 | break; |
| 161 | }; |
| 162 | return; |
| 163 | } |
| 164 | |
| 165 | static unsigned char sun_82077_fd_inb(int port) |
| 166 | { |
| 167 | udelay(5); |
| 168 | switch(port & 7) { |
| 169 | default: |
| 170 | printk("floppy: Asked to read unknown port %d\n", port); |
| 171 | panic("floppy: Port bolixed."); |
Mark Fortescue | b65f075 | 2007-07-25 23:45:10 -0700 | [diff] [blame] | 172 | case 0: /* FD_STATUS_0 */ |
| 173 | return sun_fdc->status1_82077; |
| 174 | case 1: /* FD_STATUS_1 */ |
| 175 | return sun_fdc->status2_82077; |
| 176 | case 2: /* FD_DOR */ |
| 177 | return sun_fdc->dor_82077; |
| 178 | case 3: /* FD_TDR */ |
| 179 | return sun_fdc->tapectl_82077; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | case 4: /* FD_STATUS */ |
| 181 | return sun_fdc->status_82077 & ~STATUS_DMA; |
| 182 | case 5: /* FD_DATA */ |
| 183 | return sun_fdc->data_82077; |
| 184 | case 7: /* FD_DIR */ |
Mark Fortescue | b65f075 | 2007-07-25 23:45:10 -0700 | [diff] [blame] | 185 | return sun_read_dir(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | }; |
Mark Fortescue | b65f075 | 2007-07-25 23:45:10 -0700 | [diff] [blame] | 187 | panic("sun_82077_fd_inb: How did I get here?"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | static void sun_82077_fd_outb(unsigned char value, int port) |
| 191 | { |
| 192 | udelay(5); |
| 193 | switch(port & 7) { |
| 194 | default: |
| 195 | printk("floppy: Asked to write to unknown port %d\n", port); |
| 196 | panic("floppy: Port bolixed."); |
| 197 | case 2: /* FD_DOR */ |
Mark Fortescue | b65f075 | 2007-07-25 23:45:10 -0700 | [diff] [blame] | 198 | sun_set_dor(value, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | break; |
| 200 | case 5: /* FD_DATA */ |
| 201 | sun_fdc->data_82077 = value; |
| 202 | break; |
| 203 | case 7: /* FD_DCR */ |
| 204 | sun_fdc->dcr_82077 = value; |
| 205 | break; |
| 206 | case 4: /* FD_STATUS */ |
| 207 | sun_fdc->status_82077 = value; |
| 208 | break; |
Mark Fortescue | b65f075 | 2007-07-25 23:45:10 -0700 | [diff] [blame] | 209 | case 3: /* FD_TDR */ |
| 210 | sun_fdc->tapectl_82077 = value; |
| 211 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | }; |
| 213 | return; |
| 214 | } |
| 215 | |
| 216 | /* For pseudo-dma (Sun floppy drives have no real DMA available to |
| 217 | * them so we must eat the data fifo bytes directly ourselves) we have |
| 218 | * three state variables. doing_pdma tells our inline low-level |
| 219 | * assembly floppy interrupt entry point whether it should sit and eat |
| 220 | * bytes from the fifo or just transfer control up to the higher level |
| 221 | * floppy interrupt c-code. I tried very hard but I could not get the |
| 222 | * pseudo-dma to work in c-code without getting many overruns and |
| 223 | * underruns. If non-zero, doing_pdma encodes the direction of |
| 224 | * the transfer for debugging. 1=read 2=write |
| 225 | */ |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 226 | extern char *pdma_vaddr; |
| 227 | extern unsigned long pdma_size; |
| 228 | extern volatile int doing_pdma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
| 230 | /* This is software state */ |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 231 | extern char *pdma_base; |
| 232 | extern unsigned long pdma_areasize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
| 234 | /* Common routines to all controller types on the Sparc. */ |
David S. Miller | 64d329e | 2007-10-27 00:17:01 -0700 | [diff] [blame] | 235 | static inline void virtual_dma_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | { |
| 237 | /* nothing... */ |
| 238 | } |
| 239 | |
David S. Miller | 64d329e | 2007-10-27 00:17:01 -0700 | [diff] [blame] | 240 | static inline void sun_fd_disable_dma(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | { |
| 242 | doing_pdma = 0; |
| 243 | if (pdma_base) { |
| 244 | mmu_unlockarea(pdma_base, pdma_areasize); |
Al Viro | 3c51f19 | 2005-05-04 05:38:51 +0100 | [diff] [blame] | 245 | pdma_base = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
| 247 | } |
| 248 | |
David S. Miller | 64d329e | 2007-10-27 00:17:01 -0700 | [diff] [blame] | 249 | static inline void sun_fd_set_dma_mode(int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { |
| 251 | switch(mode) { |
| 252 | case DMA_MODE_READ: |
| 253 | doing_pdma = 1; |
| 254 | break; |
| 255 | case DMA_MODE_WRITE: |
| 256 | doing_pdma = 2; |
| 257 | break; |
| 258 | default: |
| 259 | printk("Unknown dma mode %d\n", mode); |
| 260 | panic("floppy: Giving up..."); |
| 261 | } |
| 262 | } |
| 263 | |
David S. Miller | 64d329e | 2007-10-27 00:17:01 -0700 | [diff] [blame] | 264 | static inline void sun_fd_set_dma_addr(char *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | { |
| 266 | pdma_vaddr = buffer; |
| 267 | } |
| 268 | |
David S. Miller | 64d329e | 2007-10-27 00:17:01 -0700 | [diff] [blame] | 269 | static inline void sun_fd_set_dma_count(int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | { |
| 271 | pdma_size = length; |
| 272 | } |
| 273 | |
David S. Miller | 64d329e | 2007-10-27 00:17:01 -0700 | [diff] [blame] | 274 | static inline void sun_fd_enable_dma(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | { |
| 276 | pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size); |
| 277 | pdma_base = pdma_vaddr; |
| 278 | pdma_areasize = pdma_size; |
| 279 | } |
| 280 | |
| 281 | /* Our low-level entry point in arch/sparc/kernel/entry.S */ |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 282 | extern int sparc_floppy_request_irq(int irq, unsigned long flags, |
| 283 | irqreturn_t (*irq_handler)(int irq, void *)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
| 285 | static int sun_fd_request_irq(void) |
| 286 | { |
| 287 | static int once = 0; |
| 288 | int error; |
| 289 | |
| 290 | if(!once) { |
| 291 | once = 1; |
David S. Miller | 0a808a3 | 2007-08-02 00:19:14 -0700 | [diff] [blame] | 292 | error = sparc_floppy_request_irq(FLOPPY_IRQ, |
| 293 | IRQF_DISABLED, |
| 294 | floppy_interrupt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | return ((error == 0) ? 0 : -1); |
| 296 | } else return 0; |
| 297 | } |
| 298 | |
| 299 | static struct linux_prom_registers fd_regs[2]; |
| 300 | |
| 301 | static int sun_floppy_init(void) |
| 302 | { |
| 303 | char state[128]; |
| 304 | int tnode, fd_node, num_regs; |
| 305 | struct resource r; |
| 306 | |
| 307 | use_virtual_dma = 1; |
| 308 | |
| 309 | FLOPPY_IRQ = 11; |
| 310 | /* Forget it if we aren't on a machine that could possibly |
| 311 | * ever have a floppy drive. |
| 312 | */ |
| 313 | if((sparc_cpu_model != sun4c && sparc_cpu_model != sun4m) || |
| 314 | ((idprom->id_machtype == (SM_SUN4C | SM_4C_SLC)) || |
| 315 | (idprom->id_machtype == (SM_SUN4C | SM_4C_ELC)))) { |
| 316 | /* We certainly don't have a floppy controller. */ |
| 317 | goto no_sun_fdc; |
| 318 | } |
| 319 | /* Well, try to find one. */ |
| 320 | tnode = prom_getchild(prom_root_node); |
| 321 | fd_node = prom_searchsiblings(tnode, "obio"); |
| 322 | if(fd_node != 0) { |
| 323 | tnode = prom_getchild(fd_node); |
| 324 | fd_node = prom_searchsiblings(tnode, "SUNW,fdtwo"); |
| 325 | } else { |
| 326 | fd_node = prom_searchsiblings(tnode, "fd"); |
| 327 | } |
| 328 | if(fd_node == 0) { |
| 329 | goto no_sun_fdc; |
| 330 | } |
| 331 | |
| 332 | /* The sun4m lets us know if the controller is actually usable. */ |
| 333 | if(sparc_cpu_model == sun4m && |
| 334 | prom_getproperty(fd_node, "status", state, sizeof(state)) != -1) { |
| 335 | if(!strcmp(state, "disabled")) { |
| 336 | goto no_sun_fdc; |
| 337 | } |
| 338 | } |
| 339 | num_regs = prom_getproperty(fd_node, "reg", (char *) fd_regs, sizeof(fd_regs)); |
| 340 | num_regs = (num_regs / sizeof(fd_regs[0])); |
| 341 | prom_apply_obio_ranges(fd_regs, num_regs); |
| 342 | memset(&r, 0, sizeof(r)); |
| 343 | r.flags = fd_regs[0].which_io; |
| 344 | r.start = fd_regs[0].phys_addr; |
| 345 | sun_fdc = (struct sun_flpy_controller *) |
| 346 | sbus_ioremap(&r, 0, fd_regs[0].reg_size, "floppy"); |
| 347 | |
| 348 | /* Last minute sanity check... */ |
| 349 | if(sun_fdc->status_82072 == 0xff) { |
| 350 | sun_fdc = NULL; |
| 351 | goto no_sun_fdc; |
| 352 | } |
| 353 | |
Mark Fortescue | b65f075 | 2007-07-25 23:45:10 -0700 | [diff] [blame] | 354 | sun_fdops.fd_inb = sun_82077_fd_inb; |
| 355 | sun_fdops.fd_outb = sun_82077_fd_outb; |
| 356 | fdc_status = &sun_fdc->status_82077; |
| 357 | |
| 358 | if (sun_fdc->dor_82077 == 0x80) { |
| 359 | sun_fdc->dor_82077 = 0x02; |
| 360 | if (sun_fdc->dor_82077 == 0x80) { |
| 361 | sun_fdops.fd_inb = sun_82072_fd_inb; |
| 362 | sun_fdops.fd_outb = sun_82072_fd_outb; |
| 363 | fdc_status = &sun_fdc->status_82072; |
| 364 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | /* Success... */ |
| 368 | allowed_drive_mask = 0x01; |
| 369 | return (int) sun_fdc; |
| 370 | |
| 371 | no_sun_fdc: |
| 372 | return -1; |
| 373 | } |
| 374 | |
| 375 | static int sparc_eject(void) |
| 376 | { |
| 377 | set_dor(0x00, 0xff, 0x90); |
| 378 | udelay(500); |
| 379 | set_dor(0x00, 0x6f, 0x00); |
| 380 | udelay(500); |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | #define fd_eject(drive) sparc_eject() |
| 385 | |
| 386 | #define EXTRA_FLOPPY_PARAMS |
| 387 | |
| 388 | #endif /* !(__ASM_SPARC_FLOPPY_H) */ |