1 /* parport.h: sparc64 specific parport initialization and dma.
3 * Copyright (C) 1999 Eddie C. Dost (ecd@skynet.be)
6 #ifndef _ASM_SPARC64_PARPORT_H
7 #define _ASM_SPARC64_PARPORT_H 1
9 #include <linux/of_device.h>
11 #include <asm/ebus_dma.h>
12 #include <asm/ns87303.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
23 static DEFINE_SPINLOCK(dma_spin_lock);
25 #define claim_dma_lock() \
26 ({ unsigned long flags; \
27 spin_lock_irqsave(&dma_spin_lock, 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;
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)
49 if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 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);
60 if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
61 printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
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))
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)
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;
112 struct device_node *parent;
116 parent = op->dev.of_node->parent;
117 if (!strcmp(parent->name, "dma")) {
118 p = parport_pc_probe_port(base, base + 0x400,
119 op->archdata.irqs[0], PARPORT_DMA_NOFIFO,
120 op->dev.parent->parent, 0);
123 dev_set_drvdata(&op->dev, p);
127 for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) {
128 if (!test_and_set_bit(slot, dma_slot_map))
132 if (slot >= PARPORT_PC_MAX_PORTS)
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)
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))
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,
164 /* CTR bit 5 controls direction of port */
165 ns87303_modify(config, PTR,
168 p = parport_pc_probe_port(base, base + 0x400,
169 op->archdata.irqs[0],
175 goto out_disable_irq;
177 dev_set_drvdata(&op->dev, p);
182 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
183 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
186 of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len);
189 clear_bit(slot, dma_slot_map);
195 static int __devexit ecpp_remove(struct of_device *op)
197 struct parport *p = dev_get_drvdata(&op->dev);
200 parport_pc_unregister_port(p);
202 if (slot != PARPORT_DMA_NOFIFO) {
203 unsigned long d_base = op->resource[2].start;
206 d_len = (op->resource[2].end - d_base) + 1UL;
208 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
209 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
210 of_iounmap(&op->resource[2],
211 sparc_ebus_dmas[slot].info.regs,
213 clear_bit(slot, dma_slot_map);
219 static const struct of_device_id ecpp_match[] = {
225 .compatible = "ecpp",
229 .compatible = "ns87317-ecpp",
234 static struct of_platform_driver ecpp_driver = {
237 .owner = THIS_MODULE,
238 .of_match_table = ecpp_match,
241 .remove = __devexit_p(ecpp_remove),
244 static int parport_pc_find_nonpci_ports(int autoirq, int autodma)
246 of_register_driver(&ecpp_driver, &of_bus_type);
251 #endif /* !(_ASM_SPARC64_PARPORT_H */