2 * Implementation independent bits of the Floppy driver.
4 * much of this file is derived from what was originally the Q40 floppy driver.
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
10 * Copyright (C) 1999, 2000, 2001
12 * Sun3x support added 2/4/2000 Sam Creasey (sammy@sammy.net)
18 #include <linux/vmalloc.h>
20 asmlinkage irqreturn_t floppy_hardint(int irq, void *dev_id,
21 struct pt_regs *regs);
25 #undef MAX_DMA_ADDRESS
26 #define MAX_DMA_ADDRESS 0x00 /* nothing like that */
30 * Again, the CMOS information doesn't work on m68k..
32 #define FLOPPY0_TYPE (MACH_IS_Q40 ? 6 : 4)
33 #define FLOPPY1_TYPE 0
35 #define FLOPPY_MOTOR_MASK 0xf0
38 /* basically PC init + set use_virtual_dma */
39 #define FDC1 m68k_floppy_init()
45 /* vdma globals adapted from asm-i386/floppy.h */
47 static int virtual_dma_count=0;
48 static int virtual_dma_residue=0;
49 static char *virtual_dma_addr=NULL;
50 static int virtual_dma_mode=0;
51 static int doing_pdma=0;
53 #include <asm/sun3xflop.h>
55 extern spinlock_t dma_spin_lock;
57 static __inline__ unsigned long claim_dma_lock(void)
60 spin_lock_irqsave(&dma_spin_lock, flags);
64 static __inline__ void release_dma_lock(unsigned long flags)
66 spin_unlock_irqrestore(&dma_spin_lock, flags);
70 static __inline__ unsigned char fd_inb(int port)
74 else if(MACH_IS_SUN3X)
75 return sun3x_82072_fd_inb(port);
79 static __inline__ void fd_outb(unsigned char value, int port)
83 else if(MACH_IS_SUN3X)
84 sun3x_82072_fd_outb(value, port);
88 static int fd_request_irq(void)
91 return request_irq(FLOPPY_IRQ, floppy_hardint,
92 IRQF_DISABLED, "floppy", floppy_hardint);
93 else if(MACH_IS_SUN3X)
94 return sun3xflop_request_irq();
98 static void fd_free_irq(void)
101 free_irq(FLOPPY_IRQ, floppy_hardint);
104 #define fd_request_dma() vdma_request_dma(FLOPPY_DMA,"floppy")
105 #define fd_get_dma_residue() vdma_get_dma_residue(FLOPPY_DMA)
106 #define fd_dma_mem_alloc(size) vdma_mem_alloc(size)
107 #define fd_dma_setup(addr, size, mode, io) vdma_dma_setup(addr, size, mode, io)
109 #define fd_enable_irq() /* nothing... */
110 #define fd_disable_irq() /* nothing... */
112 #define fd_free_dma() /* nothing */
114 /* No 64k boundary crossing problems on Q40 - no DMA at all */
115 #define CROSS_64KB(a,s) (0)
117 #define DMA_MODE_READ 0x44 /* i386 look-alike */
118 #define DMA_MODE_WRITE 0x48
121 static int m68k_floppy_init(void)
124 can_use_virtual_dma = 1;
129 else if(MACH_IS_SUN3X)
130 return sun3xflop_init();
136 static int vdma_request_dma(unsigned int dmanr, const char * device_id)
142 static int vdma_get_dma_residue(unsigned int dummy)
144 return virtual_dma_count + virtual_dma_residue;
148 static unsigned long vdma_mem_alloc(unsigned long size)
150 return (unsigned long) vmalloc(size);
154 static void _fd_dma_mem_free(unsigned long addr, unsigned long size)
158 #define fd_dma_mem_free(addr,size) _fd_dma_mem_free(addr, size)
161 /* choose_dma_mode ???*/
163 static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
166 virtual_dma_port = (MACH_IS_Q40 ? io : 0);
167 virtual_dma_mode = (mode == DMA_MODE_WRITE);
168 virtual_dma_addr = addr;
169 virtual_dma_count = size;
170 virtual_dma_residue = 0;
176 static void fd_disable_dma(void)
179 virtual_dma_residue += virtual_dma_count;
185 /* this is the only truly Q40 specific function */
187 asmlinkage irqreturn_t floppy_hardint(int irq, void *dev_id,
188 struct pt_regs *regs)
190 register unsigned char st;
192 #undef TRACE_FLPY_INT
193 #define NO_FLOPPY_ASSEMBLER
195 #ifdef TRACE_FLPY_INT
198 static int dma_wait=0;
201 floppy_interrupt(irq, dev_id, regs);
205 #ifdef TRACE_FLPY_INT
207 bytes = virtual_dma_count;
214 /* serve 1st byte fast: */
217 for(lcount=virtual_dma_count, lptr=virtual_dma_addr;
218 lcount; lcount--, lptr++) {
219 st=inb(virtual_dma_port+4) & 0xa0 ;
223 outb_p(*lptr, virtual_dma_port+5);
225 *lptr = inb_p(virtual_dma_port+5);
228 virtual_dma_count = lcount;
229 virtual_dma_addr = lptr;
230 st = inb(virtual_dma_port+4);
233 #ifdef TRACE_FLPY_INT
239 virtual_dma_residue += virtual_dma_count;
241 #ifdef TRACE_FLPY_INT
242 printk("count=%x, residue=%x calls=%d bytes=%d dma_wait=%d\n",
243 virtual_dma_count, virtual_dma_residue, calls, bytes,
249 floppy_interrupt(irq, dev_id, regs);
252 #ifdef TRACE_FLPY_INT
253 if(!virtual_dma_count)
259 #define EXTRA_FLOPPY_PARAMS