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)
7 #ifndef _ASM_SPARC64_PARPORT_H
8 #define _ASM_SPARC64_PARPORT_H 1
12 #include <asm/ns87303.h>
14 #define PARPORT_PC_MAX_PORTS PARPORT_MAX
17 * While sparc64 doesn't have an ISA DMA API, we provide something that looks
18 * close enough to make parport_pc happy
22 static DEFINE_SPINLOCK(dma_spin_lock);
24 #define claim_dma_lock() \
25 ({ unsigned long flags; \
26 spin_lock_irqsave(&dma_spin_lock, flags); \
30 #define release_dma_lock(__flags) \
31 spin_unlock_irqrestore(&dma_spin_lock, __flags);
33 static struct sparc_ebus_info {
34 struct ebus_dma_info info;
38 } sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
40 static __inline__ int request_dma(unsigned int dmanr, const char *device_id)
42 if (dmanr >= PARPORT_PC_MAX_PORTS)
44 if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
49 static __inline__ void free_dma(unsigned int dmanr)
51 if (dmanr >= PARPORT_PC_MAX_PORTS) {
52 printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
55 if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
56 printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
61 static __inline__ void enable_dma(unsigned int dmanr)
63 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
65 if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
66 sparc_ebus_dmas[dmanr].addr,
67 sparc_ebus_dmas[dmanr].count))
71 static __inline__ void disable_dma(unsigned int dmanr)
73 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
76 static __inline__ void clear_dma_ff(unsigned int dmanr)
81 static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
83 ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
86 static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int addr)
88 sparc_ebus_dmas[dmanr].addr = addr;
91 static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
93 sparc_ebus_dmas[dmanr].count = count;
96 static __inline__ unsigned int get_dma_residue(unsigned int dmanr)
98 return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
101 static int ebus_ecpp_p(struct linux_ebus_device *edev)
103 if (!strcmp(edev->prom_node->name, "ecpp"))
105 if (!strcmp(edev->prom_node->name, "parallel")) {
108 compat = of_get_property(edev->prom_node,
111 (!strcmp(compat, "ecpp") ||
112 !strcmp(compat, "ns87317-ecpp") ||
113 !strcmp(compat + 13, "ecpp")))
119 static int parport_isa_probe(int count)
121 struct sparc_isa_bridge *isa_br;
122 struct sparc_isa_device *isa_dev;
124 for_each_isa(isa_br) {
125 for_each_isadev(isa_dev, isa_br) {
126 struct sparc_isa_device *child;
129 if (strcmp(isa_dev->prom_node->name, "dma"))
132 child = isa_dev->child;
134 if (!strcmp(child->prom_node->name, "parallel"))
141 base = child->resource.start;
143 /* No DMA, see commentary in
144 * asm-sparc64/floppy.h:isa_floppy_init()
146 if (parport_pc_probe_port(base, base + 0x400,
147 child->irq, PARPORT_DMA_NOFIFO,
156 static int parport_pc_find_nonpci_ports (int autoirq, int autodma)
158 struct linux_ebus *ebus;
159 struct linux_ebus_device *edev;
162 for_each_ebus(ebus) {
163 for_each_ebusdev(edev, ebus) {
164 if (ebus_ecpp_p(edev)) {
165 unsigned long base = edev->resource[0].start;
166 unsigned long config = edev->resource[1].start;
167 unsigned long d_base = edev->resource[2].start;
170 spin_lock_init(&sparc_ebus_dmas[count].info.lock);
171 d_len = (edev->resource[2].end -
173 sparc_ebus_dmas[count].info.regs =
174 ioremap(d_base, d_len);
175 if (!sparc_ebus_dmas[count].info.regs)
177 sparc_ebus_dmas[count].info.flags = 0;
178 sparc_ebus_dmas[count].info.callback = NULL;
179 sparc_ebus_dmas[count].info.client_cookie = NULL;
180 sparc_ebus_dmas[count].info.irq = 0xdeadbeef;
181 strcpy(sparc_ebus_dmas[count].info.name, "parport");
182 if (ebus_dma_register(&sparc_ebus_dmas[count].info))
184 ebus_dma_irq_enable(&sparc_ebus_dmas[count].info, 1);
186 /* Configure IRQ to Push Pull, Level Low */
187 /* Enable ECP, set bit 2 of the CTR first */
188 outb(0x04, base + 0x02);
189 ns87303_modify(config, PCR,
196 /* CTR bit 5 controls direction of port */
197 ns87303_modify(config, PTR,
200 if (parport_pc_probe_port(base, base + 0x400,
208 count = parport_isa_probe(count);
213 #endif /* !(_ASM_SPARC64_PARPORT_H */