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 #ifdef CONFIG_PARPORT_PC_FIFO
24 static DEFINE_SPINLOCK(dma_spin_lock);
26 #define claim_dma_lock() \
27 ({ unsigned long flags; \
28 spin_lock_irqsave(&dma_spin_lock, flags); \
32 #define release_dma_lock(__flags) \
33 spin_unlock_irqrestore(&dma_spin_lock, __flags);
36 static struct sparc_ebus_info {
37 struct ebus_dma_info info;
43 } sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
45 static DECLARE_BITMAP(dma_slot_map, PARPORT_PC_MAX_PORTS);
47 static inline int request_dma(unsigned int dmanr, const char *device_id)
49 if (dmanr >= PARPORT_PC_MAX_PORTS)
51 if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
56 static inline void free_dma(unsigned int dmanr)
58 if (dmanr >= PARPORT_PC_MAX_PORTS) {
59 printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
62 if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
63 printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
68 static inline void enable_dma(unsigned int dmanr)
70 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
72 if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
73 sparc_ebus_dmas[dmanr].addr,
74 sparc_ebus_dmas[dmanr].count))
78 static inline void disable_dma(unsigned int dmanr)
80 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
83 static inline void clear_dma_ff(unsigned int dmanr)
88 static inline void set_dma_mode(unsigned int dmanr, char mode)
90 ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
93 static inline void set_dma_addr(unsigned int dmanr, unsigned int addr)
95 sparc_ebus_dmas[dmanr].addr = addr;
98 static inline void set_dma_count(unsigned int dmanr, unsigned int count)
100 sparc_ebus_dmas[dmanr].count = count;
103 static inline unsigned int get_dma_residue(unsigned int dmanr)
105 return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
108 static int ecpp_probe(struct platform_device *op)
110 unsigned long base = op->resource[0].start;
111 unsigned long config = op->resource[1].start;
112 unsigned long d_base = op->resource[2].start;
114 struct device_node *parent;
118 parent = op->dev.of_node->parent;
119 if (!strcmp(parent->name, "dma")) {
120 p = parport_pc_probe_port(base, base + 0x400,
121 op->archdata.irqs[0], PARPORT_DMA_NOFIFO,
122 op->dev.parent->parent, 0);
125 dev_set_drvdata(&op->dev, p);
129 for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) {
130 if (!test_and_set_bit(slot, dma_slot_map))
134 if (slot >= PARPORT_PC_MAX_PORTS)
137 spin_lock_init(&sparc_ebus_dmas[slot].info.lock);
139 d_len = (op->resource[2].end - d_base) + 1UL;
140 sparc_ebus_dmas[slot].info.regs =
141 of_ioremap(&op->resource[2], 0, d_len, "ECPP DMA");
143 if (!sparc_ebus_dmas[slot].info.regs)
146 sparc_ebus_dmas[slot].info.flags = 0;
147 sparc_ebus_dmas[slot].info.callback = NULL;
148 sparc_ebus_dmas[slot].info.client_cookie = NULL;
149 sparc_ebus_dmas[slot].info.irq = 0xdeadbeef;
150 strcpy(sparc_ebus_dmas[slot].info.name, "parport");
151 if (ebus_dma_register(&sparc_ebus_dmas[slot].info))
154 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 1);
156 /* Configure IRQ to Push Pull, Level Low */
157 /* Enable ECP, set bit 2 of the CTR first */
158 outb(0x04, base + 0x02);
159 ns87303_modify(config, PCR,
166 /* CTR bit 5 controls direction of port */
167 ns87303_modify(config, PTR,
170 p = parport_pc_probe_port(base, base + 0x400,
171 op->archdata.irqs[0],
177 goto out_disable_irq;
179 dev_set_drvdata(&op->dev, p);
184 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
185 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
188 of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len);
191 clear_bit(slot, dma_slot_map);
197 static int ecpp_remove(struct platform_device *op)
199 struct parport *p = dev_get_drvdata(&op->dev);
202 parport_pc_unregister_port(p);
204 if (slot != PARPORT_DMA_NOFIFO) {
205 unsigned long d_base = op->resource[2].start;
208 d_len = (op->resource[2].end - d_base) + 1UL;
210 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
211 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
212 of_iounmap(&op->resource[2],
213 sparc_ebus_dmas[slot].info.regs,
215 clear_bit(slot, dma_slot_map);
221 static const struct of_device_id ecpp_match[] = {
227 .compatible = "ecpp",
231 .compatible = "ns87317-ecpp",
235 .compatible = "pnpALI,1533,3",
240 static struct platform_driver ecpp_driver = {
243 .of_match_table = ecpp_match,
246 .remove = ecpp_remove,
249 static int parport_pc_find_nonpci_ports(int autoirq, int autodma)
251 return platform_driver_register(&ecpp_driver);
254 #endif /* !(_ASM_SPARC64_PARPORT_H */