1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Low-level floppy stuff for Jazz family machines.
7 *
8 * Copyright (C) 1998 by Ralf Baechle
9 */
10 #include <linux/delay.h>
11 #include <linux/init.h>
12 #include <linux/linkage.h>
13 #include <linux/types.h>
14 #include <linux/mm.h>
15 #include <asm/addrspace.h>
16 #include <asm/jazz.h>
17 #include <asm/jazzdma.h>
18 #include <asm/keyboard.h>
19 #include <asm/pgtable.h>
20 #include <asm/floppy.h>
21
jazz_fd_inb(unsigned int port)22 static unsigned char jazz_fd_inb(unsigned int port)
23 {
24 unsigned char c;
25
26 c = *(volatile unsigned char *) port;
27 udelay(1);
28
29 return c;
30 }
31
jazz_fd_outb(unsigned char value,unsigned int port)32 static void jazz_fd_outb(unsigned char value, unsigned int port)
33 {
34 *(volatile unsigned char *) port = value;
35 }
36
37 /*
38 * How to access the floppy DMA functions.
39 */
jazz_fd_enable_dma(int channel)40 static void jazz_fd_enable_dma(int channel)
41 {
42 vdma_enable(JAZZ_FLOPPY_DMA);
43 }
44
jazz_fd_disable_dma(int channel)45 static void jazz_fd_disable_dma(int channel)
46 {
47 vdma_disable(JAZZ_FLOPPY_DMA);
48 }
49
jazz_fd_request_dma(int channel)50 static int jazz_fd_request_dma(int channel)
51 {
52 return 0;
53 }
54
jazz_fd_free_dma(int channel)55 static void jazz_fd_free_dma(int channel)
56 {
57 }
58
jazz_fd_clear_dma_ff(int channel)59 static void jazz_fd_clear_dma_ff(int channel)
60 {
61 }
62
jazz_fd_set_dma_mode(int channel,char mode)63 static void jazz_fd_set_dma_mode(int channel, char mode)
64 {
65 vdma_set_mode(JAZZ_FLOPPY_DMA, mode);
66 }
67
jazz_fd_set_dma_addr(int channel,unsigned int a)68 static void jazz_fd_set_dma_addr(int channel, unsigned int a)
69 {
70 vdma_set_addr(JAZZ_FLOPPY_DMA, vdma_phys2log(PHYSADDR(a)));
71 }
72
jazz_fd_set_dma_count(int channel,unsigned int count)73 static void jazz_fd_set_dma_count(int channel, unsigned int count)
74 {
75 vdma_set_count(JAZZ_FLOPPY_DMA, count);
76 }
77
jazz_fd_get_dma_residue(int channel)78 static int jazz_fd_get_dma_residue(int channel)
79 {
80 return vdma_get_residue(JAZZ_FLOPPY_DMA);
81 }
82
jazz_fd_enable_irq(int irq)83 static void jazz_fd_enable_irq(int irq)
84 {
85 }
86
jazz_fd_disable_irq(int irq)87 static void jazz_fd_disable_irq(int irq)
88 {
89 }
90
jazz_fd_getfdaddr1(void)91 static unsigned long jazz_fd_getfdaddr1(void)
92 {
93 return JAZZ_FDC_BASE;
94 }
95
jazz_fd_dma_mem_alloc(unsigned long size)96 static unsigned long jazz_fd_dma_mem_alloc(unsigned long size)
97 {
98 unsigned long mem;
99
100 mem = __get_dma_pages(GFP_KERNEL, get_order(size));
101 if(!mem)
102 return 0;
103 vdma_alloc(PHYSADDR(mem), size); /* XXX error checking */
104
105 return mem;
106 }
107
jazz_fd_dma_mem_free(unsigned long addr,unsigned long size)108 static void jazz_fd_dma_mem_free(unsigned long addr,
109 unsigned long size)
110 {
111 vdma_free(vdma_phys2log(PHYSADDR(addr)));
112 free_pages(addr, get_order(size));
113 }
114
jazz_fd_drive_type(unsigned long n)115 static unsigned long jazz_fd_drive_type(unsigned long n)
116 {
117 /* XXX This is wrong for machines with ED 2.88mb disk drives like the
118 Olivetti M700. Anyway, we should suck this from the ARC
119 firmware. */
120 if (n == 0)
121 return 4; /* 3,5", 1.44mb */
122
123 return 0;
124 }
125
126 struct fd_ops jazz_fd_ops = {
127 /*
128 * How to access the floppy controller's ports
129 */
130 jazz_fd_inb,
131 jazz_fd_outb,
132 /*
133 * How to access the floppy DMA functions.
134 */
135 jazz_fd_enable_dma,
136 jazz_fd_disable_dma,
137 jazz_fd_request_dma,
138 jazz_fd_free_dma,
139 jazz_fd_clear_dma_ff,
140 jazz_fd_set_dma_mode,
141 jazz_fd_set_dma_addr,
142 jazz_fd_set_dma_count,
143 jazz_fd_get_dma_residue,
144 jazz_fd_enable_irq,
145 jazz_fd_disable_irq,
146 jazz_fd_getfdaddr1,
147 jazz_fd_dma_mem_alloc,
148 jazz_fd_dma_mem_free,
149 jazz_fd_drive_type
150 };
151