1 /* asm-sparc/floppy.h: Sparc specific parts of the Floppy driver.
3 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 #ifndef __ASM_SPARC_FLOPPY_H
7 #define __ASM_SPARC_FLOPPY_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>
18 /* We don't need no stinkin' I/O port allocation crap. */
21 #define release_region(X, Y) do { } while(0)
22 #define request_region(X, Y, Z) (1)
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)))
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()
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;
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
));
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;
124 return sun_fdc
->dir_82077
;
127 static unsigned char sun_82072_fd_inb(int port
)
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
;
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
)
149 printk("floppy: Asked to write to unknown port %d\n", port
);
150 panic("floppy: Port bolixed.");
152 sun_set_dor(value
, 0);
154 case 5: /* FD_DATA */
155 sun_fdc
->data_82072
= value
;
158 sun_fdc
->dcr_82072
= value
;
160 case 4: /* FD_STATUS */
161 sun_fdc
->status_82072
= value
;
167 static unsigned char sun_82077_fd_inb(int port
)
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
;
179 return sun_fdc
->dor_82077
;
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
;
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
)
197 printk("floppy: Asked to write to unknown port %d\n", port
);
198 panic("floppy: Port bolixed.");
200 sun_set_dor(value
, 1);
202 case 5: /* FD_DATA */
203 sun_fdc
->data_82077
= value
;
206 sun_fdc
->dcr_82077
= value
;
208 case 4: /* FD_STATUS */
209 sun_fdc
->status_82077
= value
;
212 sun_fdc
->tapectl_82077
= value
;
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)
242 static __inline__
void sun_fd_disable_dma(void)
246 mmu_unlockarea(pdma_base
, pdma_areasize
);
251 static __inline__
void sun_fd_set_dma_mode(int mode
)
261 printk("Unknown dma mode %d\n", mode
);
262 panic("floppy: Giving up...");
266 static __inline__
void sun_fd_set_dma_addr(char *buffer
)
271 static __inline__
void sun_fd_set_dma_count(int 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)
294 error
= sparc_floppy_request_irq(FLOPPY_IRQ
,
297 return ((error
== 0) ? 0 : -1);
301 static struct linux_prom_registers fd_regs
[2];
303 static int sun_floppy_init(void)
306 int tnode
, fd_node
, num_regs
;
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. */
321 /* Well, try to find one. */
322 tnode
= prom_getchild(prom_root_node
);
323 fd_node
= prom_searchsiblings(tnode
, "obio");
325 tnode
= prom_getchild(fd_node
);
326 fd_node
= prom_searchsiblings(tnode
, "SUNW,fdtwo");
328 fd_node
= prom_searchsiblings(tnode
, "fd");
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")) {
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) {
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
;
370 allowed_drive_mask
= 0x01;
371 return (int) sun_fdc
;
377 static int sparc_eject(void)
379 set_dor(0x00, 0xff, 0x90);
381 set_dor(0x00, 0x6f, 0x00);
386 #define fd_eject(drive) sparc_eject()
388 #define EXTRA_FLOPPY_PARAMS
390 #endif /* !(__ASM_SPARC_FLOPPY_H) */