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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* $Id: parport.h,v 1.11 2001/05/11 07:54:24 davem Exp $
2 * parport.h: sparc64 specific parport initialization and dma.
3 *
4 * Copyright (C) 1999 Eddie C. Dost (ecd@skynet.be)
5 */
6
7#ifndef _ASM_SPARC64_PARPORT_H
8#define _ASM_SPARC64_PARPORT_H 1
9
10#include <asm/ebus.h>
11#include <asm/isa.h>
12#include <asm/ns87303.h>
13
14#define PARPORT_PC_MAX_PORTS PARPORT_MAX
15
Al Viro7fbacd52005-05-04 05:39:32 +010016/*
17 * While sparc64 doesn't have an ISA DMA API, we provide something that looks
18 * close enough to make parport_pc happy
19 */
20#define HAS_DMA
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022static struct sparc_ebus_info {
23 struct ebus_dma_info info;
24 unsigned int addr;
25 unsigned int count;
26} sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
27
28static __inline__ void enable_dma(unsigned int dmanr)
29{
Eddie C. Doste3e01d62005-07-06 15:41:54 -070030 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
31
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
33 sparc_ebus_dmas[dmanr].addr,
34 sparc_ebus_dmas[dmanr].count))
35 BUG();
Linus Torvalds1da177e2005-04-16 15:20:36 -070036}
37
38static __inline__ void disable_dma(unsigned int dmanr)
39{
40 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
41}
42
43static __inline__ void clear_dma_ff(unsigned int dmanr)
44{
45 /* nothing */
46}
47
48static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
49{
50 ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
51}
52
53static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int addr)
54{
55 sparc_ebus_dmas[dmanr].addr = addr;
56}
57
58static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
59{
60 sparc_ebus_dmas[dmanr].count = count;
61}
62
63static __inline__ unsigned int get_dma_residue(unsigned int dmanr)
64{
65 return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
66}
67
68static int ebus_ecpp_p(struct linux_ebus_device *edev)
69{
70 if (!strcmp(edev->prom_name, "ecpp"))
71 return 1;
72 if (!strcmp(edev->prom_name, "parallel")) {
73 char compat[19];
74 prom_getstring(edev->prom_node,
75 "compatible",
76 compat, sizeof(compat));
77 compat[18] = '\0';
78 if (!strcmp(compat, "ecpp"))
79 return 1;
80 if (!strcmp(compat, "ns87317-ecpp") &&
81 !strcmp(compat + 13, "ecpp"))
82 return 1;
83 }
84 return 0;
85}
86
87static int parport_isa_probe(int count)
88{
89 struct sparc_isa_bridge *isa_br;
90 struct sparc_isa_device *isa_dev;
91
92 for_each_isa(isa_br) {
93 for_each_isadev(isa_dev, isa_br) {
94 struct sparc_isa_device *child;
95 unsigned long base;
96
97 if (strcmp(isa_dev->prom_name, "dma"))
98 continue;
99
100 child = isa_dev->child;
101 while (child) {
102 if (!strcmp(child->prom_name, "parallel"))
103 break;
104 child = child->next;
105 }
106 if (!child)
107 continue;
108
109 base = child->resource.start;
110
111 /* No DMA, see commentary in
112 * asm-sparc64/floppy.h:isa_floppy_init()
113 */
114 if (parport_pc_probe_port(base, base + 0x400,
115 child->irq, PARPORT_DMA_NOFIFO,
116 child->bus->self))
117 count++;
118 }
119 }
120
121 return count;
122}
123
124static int parport_pc_find_nonpci_ports (int autoirq, int autodma)
125{
126 struct linux_ebus *ebus;
127 struct linux_ebus_device *edev;
128 int count = 0;
129
130 for_each_ebus(ebus) {
131 for_each_ebusdev(edev, ebus) {
132 if (ebus_ecpp_p(edev)) {
133 unsigned long base = edev->resource[0].start;
134 unsigned long config = edev->resource[1].start;
135 unsigned long d_base = edev->resource[2].start;
136 unsigned long d_len;
137
138 spin_lock_init(&sparc_ebus_dmas[count].info.lock);
139 d_len = (edev->resource[2].end -
140 d_base) + 1;
141 sparc_ebus_dmas[count].info.regs =
142 ioremap(d_base, d_len);
143 if (!sparc_ebus_dmas[count].info.regs)
144 continue;
145 sparc_ebus_dmas[count].info.flags = 0;
146 sparc_ebus_dmas[count].info.callback = NULL;
147 sparc_ebus_dmas[count].info.client_cookie = NULL;
148 sparc_ebus_dmas[count].info.irq = 0xdeadbeef;
149 strcpy(sparc_ebus_dmas[count].info.name, "parport");
150 if (ebus_dma_register(&sparc_ebus_dmas[count].info))
151 continue;
152 ebus_dma_irq_enable(&sparc_ebus_dmas[count].info, 1);
153
154 /* Configure IRQ to Push Pull, Level Low */
155 /* Enable ECP, set bit 2 of the CTR first */
156 outb(0x04, base + 0x02);
157 ns87303_modify(config, PCR,
158 PCR_EPP_ENABLE |
159 PCR_IRQ_ODRAIN,
160 PCR_ECP_ENABLE |
161 PCR_ECP_CLK_ENA |
162 PCR_IRQ_POLAR);
163
164 /* CTR bit 5 controls direction of port */
165 ns87303_modify(config, PTR,
166 0, PTR_LPT_REG_DIR);
167
168 if (parport_pc_probe_port(base, base + 0x400,
169 edev->irqs[0],
170 count, ebus->self))
171 count++;
172 }
173 }
174 }
175
176 count = parport_isa_probe(count);
177
178 return count;
179}
180
181#endif /* !(_ASM_SPARC64_PARPORT_H */