This source file includes following definitions.
- request_dma
- free_dma
- enable_dma
- disable_dma
- clear_dma_ff
- set_dma_mode
- set_dma_addr
- set_dma_count
- get_dma_residue
- ecpp_probe
- ecpp_remove
- parport_pc_find_nonpci_ports
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7 #ifndef _ASM_SPARC64_PARPORT_H
8 #define _ASM_SPARC64_PARPORT_H 1
9
10 #include <linux/of_device.h>
11
12 #include <asm/ebus_dma.h>
13 #include <asm/ns87303.h>
14 #include <asm/prom.h>
15
16 #define PARPORT_PC_MAX_PORTS PARPORT_MAX
17
18
19
20
21
22 #define HAS_DMA
23
24 #ifdef CONFIG_PARPORT_PC_FIFO
25 static DEFINE_SPINLOCK(dma_spin_lock);
26
27 #define claim_dma_lock() \
28 ({ unsigned long flags; \
29 spin_lock_irqsave(&dma_spin_lock, flags); \
30 flags; \
31 })
32
33 #define release_dma_lock(__flags) \
34 spin_unlock_irqrestore(&dma_spin_lock, __flags);
35 #endif
36
37 static struct sparc_ebus_info {
38 struct ebus_dma_info info;
39 unsigned int addr;
40 unsigned int count;
41 int lock;
42
43 struct parport *port;
44 } sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
45
46 static DECLARE_BITMAP(dma_slot_map, PARPORT_PC_MAX_PORTS);
47
48 static inline int request_dma(unsigned int dmanr, const char *device_id)
49 {
50 if (dmanr >= PARPORT_PC_MAX_PORTS)
51 return -EINVAL;
52 if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
53 return -EBUSY;
54 return 0;
55 }
56
57 static inline void free_dma(unsigned int dmanr)
58 {
59 if (dmanr >= PARPORT_PC_MAX_PORTS) {
60 printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
61 return;
62 }
63 if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
64 printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
65 return;
66 }
67 }
68
69 static inline void enable_dma(unsigned int dmanr)
70 {
71 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
72
73 if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
74 sparc_ebus_dmas[dmanr].addr,
75 sparc_ebus_dmas[dmanr].count))
76 BUG();
77 }
78
79 static inline void disable_dma(unsigned int dmanr)
80 {
81 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
82 }
83
84 static inline void clear_dma_ff(unsigned int dmanr)
85 {
86
87 }
88
89 static inline void set_dma_mode(unsigned int dmanr, char mode)
90 {
91 ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
92 }
93
94 static inline void set_dma_addr(unsigned int dmanr, unsigned int addr)
95 {
96 sparc_ebus_dmas[dmanr].addr = addr;
97 }
98
99 static inline void set_dma_count(unsigned int dmanr, unsigned int count)
100 {
101 sparc_ebus_dmas[dmanr].count = count;
102 }
103
104 static inline unsigned int get_dma_residue(unsigned int dmanr)
105 {
106 return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
107 }
108
109 static int ecpp_probe(struct platform_device *op)
110 {
111 unsigned long base = op->resource[0].start;
112 unsigned long config = op->resource[1].start;
113 unsigned long d_base = op->resource[2].start;
114 unsigned long d_len;
115 struct device_node *parent;
116 struct parport *p;
117 int slot, err;
118
119 parent = op->dev.of_node->parent;
120 if (of_node_name_eq(parent, "dma")) {
121 p = parport_pc_probe_port(base, base + 0x400,
122 op->archdata.irqs[0], PARPORT_DMA_NOFIFO,
123 op->dev.parent->parent, 0);
124 if (!p)
125 return -ENOMEM;
126 dev_set_drvdata(&op->dev, p);
127 return 0;
128 }
129
130 for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) {
131 if (!test_and_set_bit(slot, dma_slot_map))
132 break;
133 }
134 err = -ENODEV;
135 if (slot >= PARPORT_PC_MAX_PORTS)
136 goto out_err;
137
138 spin_lock_init(&sparc_ebus_dmas[slot].info.lock);
139
140 d_len = (op->resource[2].end - d_base) + 1UL;
141 sparc_ebus_dmas[slot].info.regs =
142 of_ioremap(&op->resource[2], 0, d_len, "ECPP DMA");
143
144 if (!sparc_ebus_dmas[slot].info.regs)
145 goto out_clear_map;
146
147 sparc_ebus_dmas[slot].info.flags = 0;
148 sparc_ebus_dmas[slot].info.callback = NULL;
149 sparc_ebus_dmas[slot].info.client_cookie = NULL;
150 sparc_ebus_dmas[slot].info.irq = 0xdeadbeef;
151 strcpy(sparc_ebus_dmas[slot].info.name, "parport");
152 if (ebus_dma_register(&sparc_ebus_dmas[slot].info))
153 goto out_unmap_regs;
154
155 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 1);
156
157
158
159 outb(0x04, base + 0x02);
160 ns87303_modify(config, PCR,
161 PCR_EPP_ENABLE |
162 PCR_IRQ_ODRAIN,
163 PCR_ECP_ENABLE |
164 PCR_ECP_CLK_ENA |
165 PCR_IRQ_POLAR);
166
167
168 ns87303_modify(config, PTR,
169 0, PTR_LPT_REG_DIR);
170
171 p = parport_pc_probe_port(base, base + 0x400,
172 op->archdata.irqs[0],
173 slot,
174 op->dev.parent,
175 0);
176 err = -ENOMEM;
177 if (!p)
178 goto out_disable_irq;
179
180 dev_set_drvdata(&op->dev, p);
181
182 return 0;
183
184 out_disable_irq:
185 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
186 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
187
188 out_unmap_regs:
189 of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len);
190
191 out_clear_map:
192 clear_bit(slot, dma_slot_map);
193
194 out_err:
195 return err;
196 }
197
198 static int ecpp_remove(struct platform_device *op)
199 {
200 struct parport *p = dev_get_drvdata(&op->dev);
201 int slot = p->dma;
202
203 parport_pc_unregister_port(p);
204
205 if (slot != PARPORT_DMA_NOFIFO) {
206 unsigned long d_base = op->resource[2].start;
207 unsigned long d_len;
208
209 d_len = (op->resource[2].end - d_base) + 1UL;
210
211 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
212 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
213 of_iounmap(&op->resource[2],
214 sparc_ebus_dmas[slot].info.regs,
215 d_len);
216 clear_bit(slot, dma_slot_map);
217 }
218
219 return 0;
220 }
221
222 static const struct of_device_id ecpp_match[] = {
223 {
224 .name = "ecpp",
225 },
226 {
227 .name = "parallel",
228 .compatible = "ecpp",
229 },
230 {
231 .name = "parallel",
232 .compatible = "ns87317-ecpp",
233 },
234 {
235 .name = "parallel",
236 .compatible = "pnpALI,1533,3",
237 },
238 {},
239 };
240
241 static struct platform_driver ecpp_driver = {
242 .driver = {
243 .name = "ecpp",
244 .of_match_table = ecpp_match,
245 },
246 .probe = ecpp_probe,
247 .remove = ecpp_remove,
248 };
249
250 static int parport_pc_find_nonpci_ports(int autoirq, int autodma)
251 {
252 return platform_driver_register(&ecpp_driver);
253 }
254
255 #endif