diff options
Diffstat (limited to 'include/asm-sparc64/parport.h')
-rw-r--r-- | include/asm-sparc64/parport.h | 247 |
1 files changed, 1 insertions, 246 deletions
diff --git a/include/asm-sparc64/parport.h b/include/asm-sparc64/parport.h index e9555b246c8d..b4e4ca812eb6 100644 --- a/include/asm-sparc64/parport.h +++ b/include/asm-sparc64/parport.h | |||
@@ -1,246 +1 @@ | |||
1 | /* parport.h: sparc64 specific parport initialization and dma. | #include <asm-sparc/parport.h> | |
2 | * | ||
3 | * Copyright (C) 1999 Eddie C. Dost (ecd@skynet.be) | ||
4 | */ | ||
5 | |||
6 | #ifndef _ASM_SPARC64_PARPORT_H | ||
7 | #define _ASM_SPARC64_PARPORT_H 1 | ||
8 | |||
9 | #include <asm/ebus.h> | ||
10 | #include <asm/ns87303.h> | ||
11 | #include <asm/of_device.h> | ||
12 | #include <asm/prom.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 DEFINE_SPINLOCK(dma_spin_lock); | ||
23 | |||
24 | #define claim_dma_lock() \ | ||
25 | ({ unsigned long flags; \ | ||
26 | spin_lock_irqsave(&dma_spin_lock, flags); \ | ||
27 | flags; \ | ||
28 | }) | ||
29 | |||
30 | #define release_dma_lock(__flags) \ | ||
31 | spin_unlock_irqrestore(&dma_spin_lock, __flags); | ||
32 | |||
33 | static struct sparc_ebus_info { | ||
34 | struct ebus_dma_info info; | ||
35 | unsigned int addr; | ||
36 | unsigned int count; | ||
37 | int lock; | ||
38 | |||
39 | struct parport *port; | ||
40 | } sparc_ebus_dmas[PARPORT_PC_MAX_PORTS]; | ||
41 | |||
42 | static DECLARE_BITMAP(dma_slot_map, PARPORT_PC_MAX_PORTS); | ||
43 | |||
44 | static inline int request_dma(unsigned int dmanr, const char *device_id) | ||
45 | { | ||
46 | if (dmanr >= PARPORT_PC_MAX_PORTS) | ||
47 | return -EINVAL; | ||
48 | if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0) | ||
49 | return -EBUSY; | ||
50 | return 0; | ||
51 | } | ||
52 | |||
53 | static inline void free_dma(unsigned int dmanr) | ||
54 | { | ||
55 | if (dmanr >= PARPORT_PC_MAX_PORTS) { | ||
56 | printk(KERN_WARNING "Trying to free DMA%d\n", dmanr); | ||
57 | return; | ||
58 | } | ||
59 | if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) { | ||
60 | printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr); | ||
61 | return; | ||
62 | } | ||
63 | } | ||
64 | |||
65 | static inline void enable_dma(unsigned int dmanr) | ||
66 | { | ||
67 | ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1); | ||
68 | |||
69 | if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info, | ||
70 | sparc_ebus_dmas[dmanr].addr, | ||
71 | sparc_ebus_dmas[dmanr].count)) | ||
72 | BUG(); | ||
73 | } | ||
74 | |||
75 | static inline void disable_dma(unsigned int dmanr) | ||
76 | { | ||
77 | ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0); | ||
78 | } | ||
79 | |||
80 | static inline void clear_dma_ff(unsigned int dmanr) | ||
81 | { | ||
82 | /* nothing */ | ||
83 | } | ||
84 | |||
85 | static inline void set_dma_mode(unsigned int dmanr, char mode) | ||
86 | { | ||
87 | ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE)); | ||
88 | } | ||
89 | |||
90 | static inline void set_dma_addr(unsigned int dmanr, unsigned int addr) | ||
91 | { | ||
92 | sparc_ebus_dmas[dmanr].addr = addr; | ||
93 | } | ||
94 | |||
95 | static inline void set_dma_count(unsigned int dmanr, unsigned int count) | ||
96 | { | ||
97 | sparc_ebus_dmas[dmanr].count = count; | ||
98 | } | ||
99 | |||
100 | static inline unsigned int get_dma_residue(unsigned int dmanr) | ||
101 | { | ||
102 | return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info); | ||
103 | } | ||
104 | |||
105 | static int __devinit ecpp_probe(struct of_device *op, const struct of_device_id *match) | ||
106 | { | ||
107 | unsigned long base = op->resource[0].start; | ||
108 | unsigned long config = op->resource[1].start; | ||
109 | unsigned long d_base = op->resource[2].start; | ||
110 | unsigned long d_len; | ||
111 | struct device_node *parent; | ||
112 | struct parport *p; | ||
113 | int slot, err; | ||
114 | |||
115 | parent = op->node->parent; | ||
116 | if (!strcmp(parent->name, "dma")) { | ||
117 | p = parport_pc_probe_port(base, base + 0x400, | ||
118 | op->irqs[0], PARPORT_DMA_NOFIFO, | ||
119 | op->dev.parent->parent); | ||
120 | if (!p) | ||
121 | return -ENOMEM; | ||
122 | dev_set_drvdata(&op->dev, p); | ||
123 | return 0; | ||
124 | } | ||
125 | |||
126 | for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) { | ||
127 | if (!test_and_set_bit(slot, dma_slot_map)) | ||
128 | break; | ||
129 | } | ||
130 | err = -ENODEV; | ||
131 | if (slot >= PARPORT_PC_MAX_PORTS) | ||
132 | goto out_err; | ||
133 | |||
134 | spin_lock_init(&sparc_ebus_dmas[slot].info.lock); | ||
135 | |||
136 | d_len = (op->resource[2].end - d_base) + 1UL; | ||
137 | sparc_ebus_dmas[slot].info.regs = | ||
138 | of_ioremap(&op->resource[2], 0, d_len, "ECPP DMA"); | ||
139 | |||
140 | if (!sparc_ebus_dmas[slot].info.regs) | ||
141 | goto out_clear_map; | ||
142 | |||
143 | sparc_ebus_dmas[slot].info.flags = 0; | ||
144 | sparc_ebus_dmas[slot].info.callback = NULL; | ||
145 | sparc_ebus_dmas[slot].info.client_cookie = NULL; | ||
146 | sparc_ebus_dmas[slot].info.irq = 0xdeadbeef; | ||
147 | strcpy(sparc_ebus_dmas[slot].info.name, "parport"); | ||
148 | if (ebus_dma_register(&sparc_ebus_dmas[slot].info)) | ||
149 | goto out_unmap_regs; | ||
150 | |||
151 | ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 1); | ||
152 | |||
153 | /* Configure IRQ to Push Pull, Level Low */ | ||
154 | /* Enable ECP, set bit 2 of the CTR first */ | ||
155 | outb(0x04, base + 0x02); | ||
156 | ns87303_modify(config, PCR, | ||
157 | PCR_EPP_ENABLE | | ||
158 | PCR_IRQ_ODRAIN, | ||
159 | PCR_ECP_ENABLE | | ||
160 | PCR_ECP_CLK_ENA | | ||
161 | PCR_IRQ_POLAR); | ||
162 | |||
163 | /* CTR bit 5 controls direction of port */ | ||
164 | ns87303_modify(config, PTR, | ||
165 | 0, PTR_LPT_REG_DIR); | ||
166 | |||
167 | p = parport_pc_probe_port(base, base + 0x400, | ||
168 | op->irqs[0], | ||
169 | slot, | ||
170 | op->dev.parent); | ||
171 | err = -ENOMEM; | ||
172 | if (!p) | ||
173 | goto out_disable_irq; | ||
174 | |||
175 | dev_set_drvdata(&op->dev, p); | ||
176 | |||
177 | return 0; | ||
178 | |||
179 | out_disable_irq: | ||
180 | ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0); | ||
181 | ebus_dma_unregister(&sparc_ebus_dmas[slot].info); | ||
182 | |||
183 | out_unmap_regs: | ||
184 | of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len); | ||
185 | |||
186 | out_clear_map: | ||
187 | clear_bit(slot, dma_slot_map); | ||
188 | |||
189 | out_err: | ||
190 | return err; | ||
191 | } | ||
192 | |||
193 | static int __devexit ecpp_remove(struct of_device *op) | ||
194 | { | ||
195 | struct parport *p = dev_get_drvdata(&op->dev); | ||
196 | int slot = p->dma; | ||
197 | |||
198 | parport_pc_unregister_port(p); | ||
199 | |||
200 | if (slot != PARPORT_DMA_NOFIFO) { | ||
201 | unsigned long d_base = op->resource[2].start; | ||
202 | unsigned long d_len; | ||
203 | |||
204 | d_len = (op->resource[2].end - d_base) + 1UL; | ||
205 | |||
206 | ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0); | ||
207 | ebus_dma_unregister(&sparc_ebus_dmas[slot].info); | ||
208 | of_iounmap(&op->resource[2], | ||
209 | sparc_ebus_dmas[slot].info.regs, | ||
210 | d_len); | ||
211 | clear_bit(slot, dma_slot_map); | ||
212 | } | ||
213 | |||
214 | return 0; | ||
215 | } | ||
216 | |||
217 | static struct of_device_id ecpp_match[] = { | ||
218 | { | ||
219 | .name = "ecpp", | ||
220 | }, | ||
221 | { | ||
222 | .name = "parallel", | ||
223 | .compatible = "ecpp", | ||
224 | }, | ||
225 | { | ||
226 | .name = "parallel", | ||
227 | .compatible = "ns87317-ecpp", | ||
228 | }, | ||
229 | {}, | ||
230 | }; | ||
231 | |||
232 | static struct of_platform_driver ecpp_driver = { | ||
233 | .name = "ecpp", | ||
234 | .match_table = ecpp_match, | ||
235 | .probe = ecpp_probe, | ||
236 | .remove = __devexit_p(ecpp_remove), | ||
237 | }; | ||
238 | |||
239 | static int parport_pc_find_nonpci_ports(int autoirq, int autodma) | ||
240 | { | ||
241 | of_register_driver(&ecpp_driver, &of_bus_type); | ||
242 | |||
243 | return 0; | ||
244 | } | ||
245 | |||
246 | #endif /* !(_ASM_SPARC64_PARPORT_H */ | ||