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1/* SPDX-License-Identifier: GPL-2.0 */
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 <linux/of_device.h>
11
12#include <asm/ebus_dma.h>
13#include <asm/ns87303.h>
14#include <asm/prom.h>
15
16#define PARPORT_PC_MAX_PORTS PARPORT_MAX
17
18/*
19 * While sparc64 doesn't have an ISA DMA API, we provide something that looks
20 * close enough to make parport_pc happy
21 */
22#define HAS_DMA
23
24#ifdef CONFIG_PARPORT_PC_FIFO
25static DEFINE_SPINLOCK(dma_spin_lock);
26
27#define claim_dma_lock() \
28({ unsigned long flags; \
29 spin_lock_irqsave(&dma_spin_lock, flags); \
30 flags; \
31})
32
33#define release_dma_lock(__flags) \
34 spin_unlock_irqrestore(&dma_spin_lock, __flags);
35#endif
36
37static struct sparc_ebus_info {
38 struct ebus_dma_info info;
39 unsigned int addr;
40 unsigned int count;
41 int lock;
42
43 struct parport *port;
44} sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
45
46static DECLARE_BITMAP(dma_slot_map, PARPORT_PC_MAX_PORTS);
47
48static inline int request_dma(unsigned int dmanr, const char *device_id)
49{
50 if (dmanr >= PARPORT_PC_MAX_PORTS)
51 return -EINVAL;
52 if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
53 return -EBUSY;
54 return 0;
55}
56
57static inline void free_dma(unsigned int dmanr)
58{
59 if (dmanr >= PARPORT_PC_MAX_PORTS) {
60 printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
61 return;
62 }
63 if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
64 printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
65 return;
66 }
67}
68
69static inline void enable_dma(unsigned int dmanr)
70{
71 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
72
73 if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
74 sparc_ebus_dmas[dmanr].addr,
75 sparc_ebus_dmas[dmanr].count))
76 BUG();
77}
78
79static inline void disable_dma(unsigned int dmanr)
80{
81 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
82}
83
84static inline void clear_dma_ff(unsigned int dmanr)
85{
86 /* nothing */
87}
88
89static inline void set_dma_mode(unsigned int dmanr, char mode)
90{
91 ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
92}
93
94static inline void set_dma_addr(unsigned int dmanr, unsigned int addr)
95{
96 sparc_ebus_dmas[dmanr].addr = addr;
97}
98
99static inline void set_dma_count(unsigned int dmanr, unsigned int count)
100{
101 sparc_ebus_dmas[dmanr].count = count;
102}
103
104static inline unsigned int get_dma_residue(unsigned int dmanr)
105{
106 return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
107}
108
109static int ecpp_probe(struct platform_device *op)
110{
111 unsigned long base = op->resource[0].start;
112 unsigned long config = op->resource[1].start;
113 unsigned long d_base = op->resource[2].start;
114 unsigned long d_len;
115 struct device_node *parent;
116 struct parport *p;
117 int slot, err;
118
119 parent = op->dev.of_node->parent;
120 if (of_node_name_eq(parent, "dma")) {
121 p = parport_pc_probe_port(base, base + 0x400,
122 op->archdata.irqs[0], PARPORT_DMA_NOFIFO,
123 op->dev.parent->parent, 0);
124 if (!p)
125 return -ENOMEM;
126 dev_set_drvdata(&op->dev, p);
127 return 0;
128 }
129
130 for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) {
131 if (!test_and_set_bit(slot, dma_slot_map))
132 break;
133 }
134 err = -ENODEV;
135 if (slot >= PARPORT_PC_MAX_PORTS)
136 goto out_err;
137
138 spin_lock_init(&sparc_ebus_dmas[slot].info.lock);
139
140 d_len = (op->resource[2].end - d_base) + 1UL;
141 sparc_ebus_dmas[slot].info.regs =
142 of_ioremap(&op->resource[2], 0, d_len, "ECPP DMA");
143
144 if (!sparc_ebus_dmas[slot].info.regs)
145 goto out_clear_map;
146
147 sparc_ebus_dmas[slot].info.flags = 0;
148 sparc_ebus_dmas[slot].info.callback = NULL;
149 sparc_ebus_dmas[slot].info.client_cookie = NULL;
150 sparc_ebus_dmas[slot].info.irq = 0xdeadbeef;
151 strcpy(sparc_ebus_dmas[slot].info.name, "parport");
152 if (ebus_dma_register(&sparc_ebus_dmas[slot].info))
153 goto out_unmap_regs;
154
155 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 1);
156
157 /* Configure IRQ to Push Pull, Level Low */
158 /* Enable ECP, set bit 2 of the CTR first */
159 outb(0x04, base + 0x02);
160 ns87303_modify(config, PCR,
161 PCR_EPP_ENABLE |
162 PCR_IRQ_ODRAIN,
163 PCR_ECP_ENABLE |
164 PCR_ECP_CLK_ENA |
165 PCR_IRQ_POLAR);
166
167 /* CTR bit 5 controls direction of port */
168 ns87303_modify(config, PTR,
169 0, PTR_LPT_REG_DIR);
170
171 p = parport_pc_probe_port(base, base + 0x400,
172 op->archdata.irqs[0],
173 slot,
174 op->dev.parent,
175 0);
176 err = -ENOMEM;
177 if (!p)
178 goto out_disable_irq;
179
180 dev_set_drvdata(&op->dev, p);
181
182 return 0;
183
184out_disable_irq:
185 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
186 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
187
188out_unmap_regs:
189 of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len);
190
191out_clear_map:
192 clear_bit(slot, dma_slot_map);
193
194out_err:
195 return err;
196}
197
198static int ecpp_remove(struct platform_device *op)
199{
200 struct parport *p = dev_get_drvdata(&op->dev);
201 int slot = p->dma;
202
203 parport_pc_unregister_port(p);
204
205 if (slot != PARPORT_DMA_NOFIFO) {
206 unsigned long d_base = op->resource[2].start;
207 unsigned long d_len;
208
209 d_len = (op->resource[2].end - d_base) + 1UL;
210
211 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
212 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
213 of_iounmap(&op->resource[2],
214 sparc_ebus_dmas[slot].info.regs,
215 d_len);
216 clear_bit(slot, dma_slot_map);
217 }
218
219 return 0;
220}
221
222static const struct of_device_id ecpp_match[] = {
223 {
224 .name = "ecpp",
225 },
226 {
227 .name = "parallel",
228 .compatible = "ecpp",
229 },
230 {
231 .name = "parallel",
232 .compatible = "ns87317-ecpp",
233 },
234 {
235 .name = "parallel",
236 .compatible = "pnpALI,1533,3",
237 },
238 {},
239};
240
241static struct platform_driver ecpp_driver = {
242 .driver = {
243 .name = "ecpp",
244 .of_match_table = ecpp_match,
245 },
246 .probe = ecpp_probe,
247 .remove = ecpp_remove,
248};
249
250static int parport_pc_find_nonpci_ports(int autoirq, int autodma)
251{
252 return platform_driver_register(&ecpp_driver);
253}
254
255#endif /* !(_ASM_SPARC64_PARPORT_H */
1/* SPDX-License-Identifier: GPL-2.0 */
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 <linux/of.h>
11#include <linux/platform_device.h>
12
13#include <asm/ebus_dma.h>
14#include <asm/ns87303.h>
15#include <asm/prom.h>
16
17#define PARPORT_PC_MAX_PORTS PARPORT_MAX
18
19/*
20 * While sparc64 doesn't have an ISA DMA API, we provide something that looks
21 * close enough to make parport_pc happy
22 */
23#define HAS_DMA
24
25#ifdef CONFIG_PARPORT_PC_FIFO
26static DEFINE_SPINLOCK(dma_spin_lock);
27
28#define claim_dma_lock() \
29({ unsigned long flags; \
30 spin_lock_irqsave(&dma_spin_lock, flags); \
31 flags; \
32})
33
34#define release_dma_lock(__flags) \
35 spin_unlock_irqrestore(&dma_spin_lock, __flags);
36#endif
37
38static struct sparc_ebus_info {
39 struct ebus_dma_info info;
40 unsigned int addr;
41 unsigned int count;
42 int lock;
43
44 struct parport *port;
45} sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
46
47static DECLARE_BITMAP(dma_slot_map, PARPORT_PC_MAX_PORTS);
48
49static inline int request_dma(unsigned int dmanr, const char *device_id)
50{
51 if (dmanr >= PARPORT_PC_MAX_PORTS)
52 return -EINVAL;
53 if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
54 return -EBUSY;
55 return 0;
56}
57
58static inline void free_dma(unsigned int dmanr)
59{
60 if (dmanr >= PARPORT_PC_MAX_PORTS) {
61 printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
62 return;
63 }
64 if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
65 printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
66 return;
67 }
68}
69
70static inline void enable_dma(unsigned int dmanr)
71{
72 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
73
74 if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
75 sparc_ebus_dmas[dmanr].addr,
76 sparc_ebus_dmas[dmanr].count))
77 BUG();
78}
79
80static inline void disable_dma(unsigned int dmanr)
81{
82 ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
83}
84
85static inline void clear_dma_ff(unsigned int dmanr)
86{
87 /* nothing */
88}
89
90static inline void set_dma_mode(unsigned int dmanr, char mode)
91{
92 ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
93}
94
95static inline void set_dma_addr(unsigned int dmanr, unsigned int addr)
96{
97 sparc_ebus_dmas[dmanr].addr = addr;
98}
99
100static inline void set_dma_count(unsigned int dmanr, unsigned int count)
101{
102 sparc_ebus_dmas[dmanr].count = count;
103}
104
105static inline unsigned int get_dma_residue(unsigned int dmanr)
106{
107 return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
108}
109
110static int ecpp_probe(struct platform_device *op)
111{
112 unsigned long base = op->resource[0].start;
113 unsigned long config = op->resource[1].start;
114 unsigned long d_base = op->resource[2].start;
115 unsigned long d_len;
116 struct device_node *parent;
117 struct parport *p;
118 int slot, err;
119
120 parent = op->dev.of_node->parent;
121 if (of_node_name_eq(parent, "dma")) {
122 p = parport_pc_probe_port(base, base + 0x400,
123 op->archdata.irqs[0], PARPORT_DMA_NOFIFO,
124 op->dev.parent->parent, 0);
125 if (!p)
126 return -ENOMEM;
127 dev_set_drvdata(&op->dev, p);
128 return 0;
129 }
130
131 for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) {
132 if (!test_and_set_bit(slot, dma_slot_map))
133 break;
134 }
135 err = -ENODEV;
136 if (slot >= PARPORT_PC_MAX_PORTS)
137 goto out_err;
138
139 spin_lock_init(&sparc_ebus_dmas[slot].info.lock);
140
141 d_len = (op->resource[2].end - d_base) + 1UL;
142 sparc_ebus_dmas[slot].info.regs =
143 of_ioremap(&op->resource[2], 0, d_len, "ECPP DMA");
144
145 if (!sparc_ebus_dmas[slot].info.regs)
146 goto out_clear_map;
147
148 sparc_ebus_dmas[slot].info.flags = 0;
149 sparc_ebus_dmas[slot].info.callback = NULL;
150 sparc_ebus_dmas[slot].info.client_cookie = NULL;
151 sparc_ebus_dmas[slot].info.irq = 0xdeadbeef;
152 strcpy(sparc_ebus_dmas[slot].info.name, "parport");
153 if (ebus_dma_register(&sparc_ebus_dmas[slot].info))
154 goto out_unmap_regs;
155
156 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 1);
157
158 /* Configure IRQ to Push Pull, Level Low */
159 /* Enable ECP, set bit 2 of the CTR first */
160 outb(0x04, base + 0x02);
161 ns87303_modify(config, PCR,
162 PCR_EPP_ENABLE |
163 PCR_IRQ_ODRAIN,
164 PCR_ECP_ENABLE |
165 PCR_ECP_CLK_ENA |
166 PCR_IRQ_POLAR);
167
168 /* CTR bit 5 controls direction of port */
169 ns87303_modify(config, PTR,
170 0, PTR_LPT_REG_DIR);
171
172 p = parport_pc_probe_port(base, base + 0x400,
173 op->archdata.irqs[0],
174 slot,
175 op->dev.parent,
176 0);
177 err = -ENOMEM;
178 if (!p)
179 goto out_disable_irq;
180
181 dev_set_drvdata(&op->dev, p);
182
183 return 0;
184
185out_disable_irq:
186 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
187 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
188
189out_unmap_regs:
190 of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len);
191
192out_clear_map:
193 clear_bit(slot, dma_slot_map);
194
195out_err:
196 return err;
197}
198
199static int ecpp_remove(struct platform_device *op)
200{
201 struct parport *p = dev_get_drvdata(&op->dev);
202 int slot = p->dma;
203
204 parport_pc_unregister_port(p);
205
206 if (slot != PARPORT_DMA_NOFIFO) {
207 unsigned long d_base = op->resource[2].start;
208 unsigned long d_len;
209
210 d_len = (op->resource[2].end - d_base) + 1UL;
211
212 ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
213 ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
214 of_iounmap(&op->resource[2],
215 sparc_ebus_dmas[slot].info.regs,
216 d_len);
217 clear_bit(slot, dma_slot_map);
218 }
219
220 return 0;
221}
222
223static const struct of_device_id ecpp_match[] = {
224 {
225 .name = "ecpp",
226 },
227 {
228 .name = "parallel",
229 .compatible = "ecpp",
230 },
231 {
232 .name = "parallel",
233 .compatible = "ns87317-ecpp",
234 },
235 {
236 .name = "parallel",
237 .compatible = "pnpALI,1533,3",
238 },
239 {},
240};
241
242static struct platform_driver ecpp_driver = {
243 .driver = {
244 .name = "ecpp",
245 .of_match_table = ecpp_match,
246 },
247 .probe = ecpp_probe,
248 .remove = ecpp_remove,
249};
250
251static int parport_pc_find_nonpci_ports(int autoirq, int autodma)
252{
253 return platform_driver_register(&ecpp_driver);
254}
255
256#endif /* !(_ASM_SPARC64_PARPORT_H */