ACPI: thinkpad-acpi: keep track of module state
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / asm-sparc64 / parport.h
blob8116e8f6062cad953e43ba8b7d0dc07743796079
1 /* $Id: parport.h,v 1.11 2001/05/11 07:54:24 davem Exp $
2 * parport.h: sparc64 specific parport initialization and dma.
4 * Copyright (C) 1999 Eddie C. Dost (ecd@skynet.be)
5 */
7 #ifndef _ASM_SPARC64_PARPORT_H
8 #define _ASM_SPARC64_PARPORT_H 1
10 #include <asm/ebus.h>
11 #include <asm/ns87303.h>
12 #include <asm/of_device.h>
13 #include <asm/prom.h>
15 #define PARPORT_PC_MAX_PORTS PARPORT_MAX
18 * While sparc64 doesn't have an ISA DMA API, we provide something that looks
19 * close enough to make parport_pc happy
21 #define HAS_DMA
23 static DEFINE_SPINLOCK(dma_spin_lock);
25 #define claim_dma_lock() \
26 ({ unsigned long flags; \
27 spin_lock_irqsave(&dma_spin_lock, flags); \
28 flags; \
31 #define release_dma_lock(__flags) \
32 spin_unlock_irqrestore(&dma_spin_lock, __flags);
34 static struct sparc_ebus_info {
35 struct ebus_dma_info info;
36 unsigned int addr;
37 unsigned int count;
38 int lock;
40 struct parport *port;
41 } sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
43 static DECLARE_BITMAP(dma_slot_map, PARPORT_PC_MAX_PORTS);
45 static __inline__ int request_dma(unsigned int dmanr, const char *device_id)
47 if (dmanr >= PARPORT_PC_MAX_PORTS)
48 return -EINVAL;
49 if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
50 return -EBUSY;
51 return 0;
54 static __inline__ void free_dma(unsigned int dmanr)
56 if (dmanr >= PARPORT_PC_MAX_PORTS) {
57 printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
58 return;
60 if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
61 printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
62 return;
66 static __inline__ void enable_dma(unsigned int dmanr)
68 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
70 if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
71 sparc_ebus_dmas[dmanr].addr,
72 sparc_ebus_dmas[dmanr].count))
73 BUG();
76 static __inline__ void disable_dma(unsigned int dmanr)
78 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
81 static __inline__ void clear_dma_ff(unsigned int dmanr)
83 /* nothing */
86 static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
88 ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
91 static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int addr)
93 sparc_ebus_dmas[dmanr].addr = addr;
96 static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
98 sparc_ebus_dmas[dmanr].count = count;
101 static __inline__ unsigned int get_dma_residue(unsigned int dmanr)
103 return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
106 static int __devinit ecpp_probe(struct of_device *op, const struct of_device_id *match)
108 unsigned long base = op->resource[0].start;
109 unsigned long config = op->resource[1].start;
110 unsigned long d_base = op->resource[2].start;
111 unsigned long d_len;
112 struct device_node *parent;
113 struct parport *p;
114 int slot, err;
116 parent = op->node->parent;
117 if (!strcmp(parent->name, "dma")) {
118 p = parport_pc_probe_port(base, base + 0x400,
119 op->irqs[0], PARPORT_DMA_NOFIFO,
120 op->dev.parent->parent);
121 if (!p)
122 return -ENOMEM;
123 dev_set_drvdata(&op->dev, p);
124 return 0;
127 for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) {
128 if (!test_and_set_bit(slot, dma_slot_map))
129 break;
131 err = -ENODEV;
132 if (slot >= PARPORT_PC_MAX_PORTS)
133 goto out_err;
135 spin_lock_init(&sparc_ebus_dmas[slot].info.lock);
137 d_len = (op->resource[2].end - d_base) + 1UL;
138 sparc_ebus_dmas[slot].info.regs =
139 of_ioremap(&op->resource[2], 0, d_len, "ECPP DMA");
141 if (!sparc_ebus_dmas[slot].info.regs)
142 goto out_clear_map;
144 sparc_ebus_dmas[slot].info.flags = 0;
145 sparc_ebus_dmas[slot].info.callback = NULL;
146 sparc_ebus_dmas[slot].info.client_cookie = NULL;
147 sparc_ebus_dmas[slot].info.irq = 0xdeadbeef;
148 strcpy(sparc_ebus_dmas[slot].info.name, "parport");
149 if (ebus_dma_register(&sparc_ebus_dmas[slot].info))
150 goto out_unmap_regs;
152 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 1);
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);
164 /* CTR bit 5 controls direction of port */
165 ns87303_modify(config, PTR,
166 0, PTR_LPT_REG_DIR);
168 p = parport_pc_probe_port(base, base + 0x400,
169 op->irqs[0],
170 slot,
171 op->dev.parent);
172 err = -ENOMEM;
173 if (!p)
174 goto out_disable_irq;
176 dev_set_drvdata(&op->dev, p);
178 return 0;
180 out_disable_irq:
181 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
182 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
184 out_unmap_regs:
185 of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len);
187 out_clear_map:
188 clear_bit(slot, dma_slot_map);
190 out_err:
191 return err;
194 static int __devexit ecpp_remove(struct of_device *op)
196 struct parport *p = dev_get_drvdata(&op->dev);
197 int slot = p->dma;
199 parport_pc_unregister_port(p);
201 if (slot != PARPORT_DMA_NOFIFO) {
202 unsigned long d_base = op->resource[2].start;
203 unsigned long d_len;
205 d_len = (op->resource[2].end - d_base) + 1UL;
207 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
208 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
209 of_iounmap(&op->resource[2],
210 sparc_ebus_dmas[slot].info.regs,
211 d_len);
212 clear_bit(slot, dma_slot_map);
215 return 0;
218 static struct of_device_id ecpp_match[] = {
220 .name = "ecpp",
223 .name = "parallel",
224 .compatible = "ecpp",
227 .name = "parallel",
228 .compatible = "ns87317-ecpp",
233 static struct of_platform_driver ecpp_driver = {
234 .name = "ecpp",
235 .match_table = ecpp_match,
236 .probe = ecpp_probe,
237 .remove = __devexit_p(ecpp_remove),
240 static int parport_pc_find_nonpci_ports(int autoirq, int autodma)
242 of_register_driver(&ecpp_driver, &of_bus_type);
244 return 0;
247 #endif /* !(_ASM_SPARC64_PARPORT_H */