fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-sparc / floppy.h
blobacd06d8ff70a040ba5063ca99b93689c231f24eb
1 /* asm-sparc/floppy.h: Sparc specific parts of the Floppy driver.
3 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
4 */
6 #ifndef __ASM_SPARC_FLOPPY_H
7 #define __ASM_SPARC_FLOPPY_H
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>
18 /* We don't need no stinkin' I/O port allocation crap. */
19 #undef release_region
20 #undef request_region
21 #define release_region(X, Y) do { } while(0)
22 #define request_region(X, Y, Z) (1)
24 /* References:
25 * 1) Netbsd Sun floppy driver.
26 * 2) NCR 82077 controller manual
27 * 3) Intel 82077 controller manual
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 */
34 volatile unsigned char data_82072; /* Data fifo. */
35 #define status2_82077 data_82072 /* Auxiliary Status reg. 2 */
37 volatile unsigned char dor_82077; /* Digital Output reg. */
38 volatile unsigned char tapectl_82077; /* What the? Tape control reg? */
40 volatile unsigned char status_82077; /* Main Status Register. */
41 #define drs_82077 status_82077 /* Digital Rate Select reg. */
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. */
49 /* You'll only ever find one controller on a SparcStation anyways. */
50 static struct sun_flpy_controller *sun_fdc = NULL;
51 extern volatile unsigned char *fdc_status;
53 struct sun_floppy_ops {
54 unsigned char (*fd_inb)(int port);
55 void (*fd_outb)(unsigned char value, int port);
58 static struct sun_floppy_ops sun_fdops;
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
80 #define FLOPPY_MOTOR_MASK 0x10
82 /* XXX This isn't really correct. XXX */
83 #define get_dma_residue(x) (0)
85 #define FLOPPY0_TYPE 4
86 #define FLOPPY1_TYPE 0
88 /* Super paranoid... */
89 #undef HAVE_DISABLE_HLT
91 /* Here is where we catch the floppy driver trying to initialize,
92 * therefore this is where we call the PROM device tree probing
93 * routine etc. on the Sparc.
95 #define FDC1 sun_floppy_init()
97 #define N_FDC 1
98 #define N_DRIVE 8
100 /* No 64k boundary crossing problems on the Sparc. */
101 #define CROSS_64KB(a,s) (0)
103 /* Routines unique to each controller type on a Sun. */
104 static void sun_set_dor(unsigned char value, int fdc_82077)
106 if (sparc_cpu_model == sun4c) {
107 unsigned int bits = 0;
108 if (value & 0x10)
109 bits |= AUXIO_FLPY_DSEL;
110 if ((value & 0x80) == 0)
111 bits |= AUXIO_FLPY_EJCT;
112 set_auxio(bits, (~bits) & (AUXIO_FLPY_DSEL|AUXIO_FLPY_EJCT));
114 if (fdc_82077) {
115 sun_fdc->dor_82077 = value;
119 static unsigned char sun_read_dir(void)
121 if (sparc_cpu_model == sun4c)
122 return (get_auxio() & AUXIO_FLPY_DCHG) ? 0x80 : 0;
123 else
124 return sun_fdc->dir_82077;
127 static unsigned char sun_82072_fd_inb(int port)
129 udelay(5);
130 switch(port & 7) {
131 default:
132 printk("floppy: Asked to read unknown port %d\n", port);
133 panic("floppy: Port bolixed.");
134 case 4: /* FD_STATUS */
135 return sun_fdc->status_82072 & ~STATUS_DMA;
136 case 5: /* FD_DATA */
137 return sun_fdc->data_82072;
138 case 7: /* FD_DIR */
139 return sun_read_dir();
141 panic("sun_82072_fd_inb: How did I get here?");
144 static void sun_82072_fd_outb(unsigned char value, int port)
146 udelay(5);
147 switch(port & 7) {
148 default:
149 printk("floppy: Asked to write to unknown port %d\n", port);
150 panic("floppy: Port bolixed.");
151 case 2: /* FD_DOR */
152 sun_set_dor(value, 0);
153 break;
154 case 5: /* FD_DATA */
155 sun_fdc->data_82072 = value;
156 break;
157 case 7: /* FD_DCR */
158 sun_fdc->dcr_82072 = value;
159 break;
160 case 4: /* FD_STATUS */
161 sun_fdc->status_82072 = value;
162 break;
164 return;
167 static unsigned char sun_82077_fd_inb(int port)
169 udelay(5);
170 switch(port & 7) {
171 default:
172 printk("floppy: Asked to read unknown port %d\n", port);
173 panic("floppy: Port bolixed.");
174 case 0: /* FD_STATUS_0 */
175 return sun_fdc->status1_82077;
176 case 1: /* FD_STATUS_1 */
177 return sun_fdc->status2_82077;
178 case 2: /* FD_DOR */
179 return sun_fdc->dor_82077;
180 case 3: /* FD_TDR */
181 return sun_fdc->tapectl_82077;
182 case 4: /* FD_STATUS */
183 return sun_fdc->status_82077 & ~STATUS_DMA;
184 case 5: /* FD_DATA */
185 return sun_fdc->data_82077;
186 case 7: /* FD_DIR */
187 return sun_read_dir();
189 panic("sun_82077_fd_inb: How did I get here?");
192 static void sun_82077_fd_outb(unsigned char value, int port)
194 udelay(5);
195 switch(port & 7) {
196 default:
197 printk("floppy: Asked to write to unknown port %d\n", port);
198 panic("floppy: Port bolixed.");
199 case 2: /* FD_DOR */
200 sun_set_dor(value, 1);
201 break;
202 case 5: /* FD_DATA */
203 sun_fdc->data_82077 = value;
204 break;
205 case 7: /* FD_DCR */
206 sun_fdc->dcr_82077 = value;
207 break;
208 case 4: /* FD_STATUS */
209 sun_fdc->status_82077 = value;
210 break;
211 case 3: /* FD_TDR */
212 sun_fdc->tapectl_82077 = value;
213 break;
215 return;
218 /* For pseudo-dma (Sun floppy drives have no real DMA available to
219 * them so we must eat the data fifo bytes directly ourselves) we have
220 * three state variables. doing_pdma tells our inline low-level
221 * assembly floppy interrupt entry point whether it should sit and eat
222 * bytes from the fifo or just transfer control up to the higher level
223 * floppy interrupt c-code. I tried very hard but I could not get the
224 * pseudo-dma to work in c-code without getting many overruns and
225 * underruns. If non-zero, doing_pdma encodes the direction of
226 * the transfer for debugging. 1=read 2=write
228 extern char *pdma_vaddr;
229 extern unsigned long pdma_size;
230 extern volatile int doing_pdma;
232 /* This is software state */
233 extern char *pdma_base;
234 extern unsigned long pdma_areasize;
236 /* Common routines to all controller types on the Sparc. */
237 static __inline__ void virtual_dma_init(void)
239 /* nothing... */
242 static __inline__ void sun_fd_disable_dma(void)
244 doing_pdma = 0;
245 if (pdma_base) {
246 mmu_unlockarea(pdma_base, pdma_areasize);
247 pdma_base = NULL;
251 static __inline__ void sun_fd_set_dma_mode(int mode)
253 switch(mode) {
254 case DMA_MODE_READ:
255 doing_pdma = 1;
256 break;
257 case DMA_MODE_WRITE:
258 doing_pdma = 2;
259 break;
260 default:
261 printk("Unknown dma mode %d\n", mode);
262 panic("floppy: Giving up...");
266 static __inline__ void sun_fd_set_dma_addr(char *buffer)
268 pdma_vaddr = buffer;
271 static __inline__ void sun_fd_set_dma_count(int length)
273 pdma_size = length;
276 static __inline__ void sun_fd_enable_dma(void)
278 pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size);
279 pdma_base = pdma_vaddr;
280 pdma_areasize = pdma_size;
283 /* Our low-level entry point in arch/sparc/kernel/entry.S */
284 extern int sparc_floppy_request_irq(int irq, unsigned long flags,
285 irqreturn_t (*irq_handler)(int irq, void *));
287 static int sun_fd_request_irq(void)
289 static int once = 0;
290 int error;
292 if(!once) {
293 once = 1;
294 error = sparc_floppy_request_irq(FLOPPY_IRQ,
295 IRQF_DISABLED,
296 floppy_interrupt);
297 return ((error == 0) ? 0 : -1);
298 } else return 0;
301 static struct linux_prom_registers fd_regs[2];
303 static int sun_floppy_init(void)
305 char state[128];
306 int tnode, fd_node, num_regs;
307 struct resource r;
309 use_virtual_dma = 1;
311 FLOPPY_IRQ = 11;
312 /* Forget it if we aren't on a machine that could possibly
313 * ever have a floppy drive.
315 if((sparc_cpu_model != sun4c && sparc_cpu_model != sun4m) ||
316 ((idprom->id_machtype == (SM_SUN4C | SM_4C_SLC)) ||
317 (idprom->id_machtype == (SM_SUN4C | SM_4C_ELC)))) {
318 /* We certainly don't have a floppy controller. */
319 goto no_sun_fdc;
321 /* Well, try to find one. */
322 tnode = prom_getchild(prom_root_node);
323 fd_node = prom_searchsiblings(tnode, "obio");
324 if(fd_node != 0) {
325 tnode = prom_getchild(fd_node);
326 fd_node = prom_searchsiblings(tnode, "SUNW,fdtwo");
327 } else {
328 fd_node = prom_searchsiblings(tnode, "fd");
330 if(fd_node == 0) {
331 goto no_sun_fdc;
334 /* The sun4m lets us know if the controller is actually usable. */
335 if(sparc_cpu_model == sun4m &&
336 prom_getproperty(fd_node, "status", state, sizeof(state)) != -1) {
337 if(!strcmp(state, "disabled")) {
338 goto no_sun_fdc;
341 num_regs = prom_getproperty(fd_node, "reg", (char *) fd_regs, sizeof(fd_regs));
342 num_regs = (num_regs / sizeof(fd_regs[0]));
343 prom_apply_obio_ranges(fd_regs, num_regs);
344 memset(&r, 0, sizeof(r));
345 r.flags = fd_regs[0].which_io;
346 r.start = fd_regs[0].phys_addr;
347 sun_fdc = (struct sun_flpy_controller *)
348 sbus_ioremap(&r, 0, fd_regs[0].reg_size, "floppy");
350 /* Last minute sanity check... */
351 if(sun_fdc->status_82072 == 0xff) {
352 sun_fdc = NULL;
353 goto no_sun_fdc;
356 sun_fdops.fd_inb = sun_82077_fd_inb;
357 sun_fdops.fd_outb = sun_82077_fd_outb;
358 fdc_status = &sun_fdc->status_82077;
360 if (sun_fdc->dor_82077 == 0x80) {
361 sun_fdc->dor_82077 = 0x02;
362 if (sun_fdc->dor_82077 == 0x80) {
363 sun_fdops.fd_inb = sun_82072_fd_inb;
364 sun_fdops.fd_outb = sun_82072_fd_outb;
365 fdc_status = &sun_fdc->status_82072;
369 /* Success... */
370 allowed_drive_mask = 0x01;
371 return (int) sun_fdc;
373 no_sun_fdc:
374 return -1;
377 static int sparc_eject(void)
379 set_dor(0x00, 0xff, 0x90);
380 udelay(500);
381 set_dor(0x00, 0x6f, 0x00);
382 udelay(500);
383 return 0;
386 #define fd_eject(drive) sparc_eject()
388 #define EXTRA_FLOPPY_PARAMS
390 #endif /* !(__ASM_SPARC_FLOPPY_H) */