[SPARC64]: Fix parport_pc build.
[linux-2.6.git] / include / asm-sparc64 / parport.h
1 /* $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
16 /*
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
22 static struct sparc_ebus_info {
23         struct ebus_dma_info info;
24         unsigned int addr;
25         unsigned int count;
26         int lock;
27 } sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
28
29 static __inline__ int request_dma(unsigned int dmanr, const char *device_id)
30 {
31         if (dmanr >= PARPORT_PC_MAX_PORTS)
32                 return -EINVAL;
33         if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
34                 return -EBUSY;
35         return 0;
36 }
37
38 static __inline__ void free_dma(unsigned int dmanr)
39 {
40         if (dmanr >= PARPORT_PC_MAX_PORTS) {
41                 printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
42                 return;
43         }
44         if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
45                 printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
46                 return;
47         }       
48 }
49
50 static __inline__ void enable_dma(unsigned int dmanr)
51 {
52         ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
53
54         if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
55                              sparc_ebus_dmas[dmanr].addr,
56                              sparc_ebus_dmas[dmanr].count))
57                 BUG();
58 }
59
60 static __inline__ void disable_dma(unsigned int dmanr)
61 {
62         ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
63 }
64
65 static __inline__ void clear_dma_ff(unsigned int dmanr)
66 {
67         /* nothing */
68 }
69
70 static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
71 {
72         ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
73 }
74
75 static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int addr)
76 {
77         sparc_ebus_dmas[dmanr].addr = addr;
78 }
79
80 static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
81 {
82         sparc_ebus_dmas[dmanr].count = count;
83 }
84
85 static __inline__ unsigned int get_dma_residue(unsigned int dmanr)
86 {
87         return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
88 }
89
90 static int ebus_ecpp_p(struct linux_ebus_device *edev)
91 {
92         if (!strcmp(edev->prom_node->name, "ecpp"))
93                 return 1;
94         if (!strcmp(edev->prom_node->name, "parallel")) {
95                 char *compat;
96
97                 compat = of_get_property(edev->prom_node,
98                                          "compatible", NULL);
99                 if (compat &&
100                     (!strcmp(compat, "ecpp") ||
101                      !strcmp(compat, "ns87317-ecpp") ||
102                      !strcmp(compat + 13, "ecpp")))
103                         return 1;
104         }
105         return 0;
106 }
107
108 static int parport_isa_probe(int count)
109 {
110         struct sparc_isa_bridge *isa_br;
111         struct sparc_isa_device *isa_dev;
112
113         for_each_isa(isa_br) {
114                 for_each_isadev(isa_dev, isa_br) {
115                         struct sparc_isa_device *child;
116                         unsigned long base;
117
118                         if (strcmp(isa_dev->prom_node->name, "dma"))
119                                 continue;
120
121                         child = isa_dev->child;
122                         while (child) {
123                                 if (!strcmp(child->prom_node->name, "parallel"))
124                                         break;
125                                 child = child->next;
126                         }
127                         if (!child)
128                                 continue;
129
130                         base = child->resource.start;
131
132                         /* No DMA, see commentary in
133                          * asm-sparc64/floppy.h:isa_floppy_init()
134                          */
135                         if (parport_pc_probe_port(base, base + 0x400,
136                                                   child->irq, PARPORT_DMA_NOFIFO,
137                                                   child->bus->self))
138                                 count++;
139                 }
140         }
141
142         return count;
143 }
144
145 static int parport_pc_find_nonpci_ports (int autoirq, int autodma)
146 {
147         struct linux_ebus *ebus;
148         struct linux_ebus_device *edev;
149         int count = 0;
150
151         for_each_ebus(ebus) {
152                 for_each_ebusdev(edev, ebus) {
153                         if (ebus_ecpp_p(edev)) {
154                                 unsigned long base = edev->resource[0].start;
155                                 unsigned long config = edev->resource[1].start;
156                                 unsigned long d_base = edev->resource[2].start;
157                                 unsigned long d_len;
158
159                                 spin_lock_init(&sparc_ebus_dmas[count].info.lock);
160                                 d_len = (edev->resource[2].end -
161                                          d_base) + 1;
162                                 sparc_ebus_dmas[count].info.regs =
163                                         ioremap(d_base, d_len);
164                                 if (!sparc_ebus_dmas[count].info.regs)
165                                         continue;
166                                 sparc_ebus_dmas[count].info.flags = 0;
167                                 sparc_ebus_dmas[count].info.callback = NULL;
168                                 sparc_ebus_dmas[count].info.client_cookie = NULL;
169                                 sparc_ebus_dmas[count].info.irq = 0xdeadbeef;
170                                 strcpy(sparc_ebus_dmas[count].info.name, "parport");
171                                 if (ebus_dma_register(&sparc_ebus_dmas[count].info))
172                                         continue;
173                                 ebus_dma_irq_enable(&sparc_ebus_dmas[count].info, 1);
174
175                                 /* Configure IRQ to Push Pull, Level Low */
176                                 /* Enable ECP, set bit 2 of the CTR first */
177                                 outb(0x04, base + 0x02);
178                                 ns87303_modify(config, PCR,
179                                                PCR_EPP_ENABLE |
180                                                PCR_IRQ_ODRAIN,
181                                                PCR_ECP_ENABLE |
182                                                PCR_ECP_CLK_ENA |
183                                                PCR_IRQ_POLAR);
184
185                                 /* CTR bit 5 controls direction of port */
186                                 ns87303_modify(config, PTR,
187                                                0, PTR_LPT_REG_DIR);
188
189                                 if (parport_pc_probe_port(base, base + 0x400,
190                                                           edev->irqs[0],
191                                                           count, ebus->self))
192                                         count++;
193                         }
194                 }
195         }
196
197         count = parport_isa_probe(count);
198
199         return count;
200 }
201
202 #endif /* !(_ASM_SPARC64_PARPORT_H */