1 /* $Id: parport.h,v 1.9 2000/03/16 07:47:27 davem Exp $
2 * parport.h: sparc64 specific parport initialization and dma.
3 *
4 * Copyright (C) 1999 Eddie C. Dost (ecd@skynet.be)
5 */
6
7 #ifndef _ASM_SPARC64_PARPORT_H
8 #define _ASM_SPARC64_PARPORT_H 1
9
10 #include <asm/ebus.h>
11 #include <asm/ns87303.h>
12
13 #define PARPORT_PC_MAX_PORTS PARPORT_MAX
14
15 static struct linux_ebus_dma *sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
16
17 static __inline__ void
18 reset_dma(unsigned int dmanr)
19 {
20 unsigned int dcsr;
21
22 writel(EBUS_DCSR_RESET, &sparc_ebus_dmas[dmanr]->dcsr);
23 udelay(1);
24 dcsr = EBUS_DCSR_BURST_SZ_16 | EBUS_DCSR_TCI_DIS |
25 EBUS_DCSR_EN_CNT | EBUS_DCSR_INT_EN;
26 writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
27 }
28
29 static __inline__ void
30 enable_dma(unsigned int dmanr)
31 {
32 unsigned int dcsr;
33
34 dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
35 dcsr |= EBUS_DCSR_EN_DMA;
36 writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
37 }
38
39 static __inline__ void
40 disable_dma(unsigned int dmanr)
41 {
42 unsigned int dcsr;
43
44 dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
45 if (dcsr & EBUS_DCSR_EN_DMA) {
46 while (dcsr & EBUS_DCSR_DRAIN) {
47 udelay(1);
48 dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
49 }
50 dcsr &= ~(EBUS_DCSR_EN_DMA);
51 writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
52
53 dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
54 if (dcsr & EBUS_DCSR_ERR_PEND)
55 reset_dma(dmanr);
56 }
57 }
58
59 static __inline__ void
60 clear_dma_ff(unsigned int dmanr)
61 {
62 /* nothing */
63 }
64
65 static __inline__ void
66 set_dma_mode(unsigned int dmanr, char mode)
67 {
68 unsigned int dcsr;
69
70 dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
71 dcsr |= EBUS_DCSR_EN_CNT | EBUS_DCSR_TC;
72 if (mode == DMA_MODE_WRITE)
73 dcsr &= ~(EBUS_DCSR_WRITE);
74 else
75 dcsr |= EBUS_DCSR_WRITE;
76 writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
77 }
78
79 static __inline__ void
80 set_dma_addr(unsigned int dmanr, unsigned int addr)
81 {
82 writel(addr, &sparc_ebus_dmas[dmanr]->dacr);
83 }
84
85 static __inline__ void
86 set_dma_count(unsigned int dmanr, unsigned int count)
87 {
88 writel(count, &sparc_ebus_dmas[dmanr]->dbcr);
89 }
90
91 static __inline__ int
92 get_dma_residue(unsigned int dmanr)
93 {
94 int res;
95
96 res = readl(&sparc_ebus_dmas[dmanr]->dbcr);
97 if (res != 0)
98 reset_dma(dmanr);
99 return res;
100 }
101
102 static int parport_pc_find_nonpci_ports (int autoirq, int autodma)
103 {
104 struct linux_ebus *ebus;
105 struct linux_ebus_device *edev;
106 int count = 0;
107
108 if (!pci_present())
109 return 0;
110
111 for_each_ebus(ebus) {
112 for_each_ebusdev(edev, ebus) {
113 if (!strcmp(edev->prom_name, "ecpp")) {
114 unsigned long base = edev->resource[0].start;
115 unsigned long config = edev->resource[1].start;
116
117 sparc_ebus_dmas[count] =
118 (struct linux_ebus_dma *)
119 edev->resource[2].start;
120 reset_dma(count);
121
122 /* Configure IRQ to Push Pull, Level Low */
123 /* Enable ECP, set bit 2 of the CTR first */
124 outb(0x04, base + 0x02);
125 ns87303_modify(config, PCR,
126 PCR_EPP_ENABLE |
127 PCR_IRQ_ODRAIN,
128 PCR_ECP_ENABLE |
129 PCR_ECP_CLK_ENA |
130 PCR_IRQ_POLAR);
131
132 /* CTR bit 5 controls direction of port */
133 ns87303_modify(config, PTR,
134 0, PTR_LPT_REG_DIR);
135
136 if (parport_pc_probe_port(base, base + 0x400,
137 edev->irqs[0],
138 count, ebus->self))
139 count++;
140 }
141 }
142 }
143
144 return count;
145 }
146
147 #endif /* !(_ASM_SPARC64_PARPORT_H */
148
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