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16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/parport.h>
19#include <linux/ioport.h>
20#include <linux/interrupt.h>
21#include <linux/platform_device.h>
22
23#include <asm/setup.h>
24#include <asm/amigahw.h>
25#include <asm/irq.h>
26#include <asm/io.h>
27#include <asm/amigaints.h>
28
29#undef DEBUG
30#ifdef DEBUG
31#define DPRINTK printk
32#else
33#define DPRINTK(x...) do { } while (0)
34#endif
35
36
37static void amiga_write_data(struct parport *p, unsigned char data)
38{
39 DPRINTK(KERN_DEBUG "write_data %c\n",data);
40
41 ciaa.prb = data;
42 mb();
43}
44
45static unsigned char amiga_read_data(struct parport *p)
46{
47
48 return ciaa.prb;
49}
50
51static unsigned char control_amiga_to_pc(unsigned char control)
52{
53 return PARPORT_CONTROL_SELECT |
54 PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_STROBE;
55
56
57}
58
59static void amiga_write_control(struct parport *p, unsigned char control)
60{
61 DPRINTK(KERN_DEBUG "write_control %02x\n",control);
62
63}
64
65static unsigned char amiga_read_control( struct parport *p)
66{
67 DPRINTK(KERN_DEBUG "read_control \n");
68 return control_amiga_to_pc(0);
69}
70
71static unsigned char amiga_frob_control( struct parport *p, unsigned char mask, unsigned char val)
72{
73 unsigned char old;
74
75 DPRINTK(KERN_DEBUG "frob_control mask %02x, value %02x\n",mask,val);
76 old = amiga_read_control(p);
77 amiga_write_control(p, (old & ~mask) ^ val);
78 return old;
79}
80
81static unsigned char status_amiga_to_pc(unsigned char status)
82{
83 unsigned char ret = PARPORT_STATUS_BUSY | PARPORT_STATUS_ACK | PARPORT_STATUS_ERROR;
84
85 if (status & 1)
86 ret &= ~PARPORT_STATUS_BUSY;
87 if (status & 2)
88 ret |= PARPORT_STATUS_PAPEROUT;
89 if (status & 4)
90 ret |= PARPORT_STATUS_SELECT;
91
92
93 return ret;
94}
95
96static unsigned char amiga_read_status(struct parport *p)
97{
98 unsigned char status;
99
100 status = status_amiga_to_pc(ciab.pra & 7);
101 DPRINTK(KERN_DEBUG "read_status %02x\n", status);
102 return status;
103}
104
105static void amiga_enable_irq(struct parport *p)
106{
107 enable_irq(IRQ_AMIGA_CIAA_FLG);
108}
109
110static void amiga_disable_irq(struct parport *p)
111{
112 disable_irq(IRQ_AMIGA_CIAA_FLG);
113}
114
115static void amiga_data_forward(struct parport *p)
116{
117 DPRINTK(KERN_DEBUG "forward\n");
118 ciaa.ddrb = 0xff;
119 mb();
120}
121
122static void amiga_data_reverse(struct parport *p)
123{
124 DPRINTK(KERN_DEBUG "reverse\n");
125 ciaa.ddrb = 0;
126 mb();
127}
128
129static void amiga_init_state(struct pardevice *dev, struct parport_state *s)
130{
131 s->u.amiga.data = 0;
132 s->u.amiga.datadir = 255;
133 s->u.amiga.status = 0;
134 s->u.amiga.statusdir = 0;
135}
136
137static void amiga_save_state(struct parport *p, struct parport_state *s)
138{
139 mb();
140 s->u.amiga.data = ciaa.prb;
141 s->u.amiga.datadir = ciaa.ddrb;
142 s->u.amiga.status = ciab.pra & 7;
143 s->u.amiga.statusdir = ciab.ddra & 7;
144 mb();
145}
146
147static void amiga_restore_state(struct parport *p, struct parport_state *s)
148{
149 mb();
150 ciaa.prb = s->u.amiga.data;
151 ciaa.ddrb = s->u.amiga.datadir;
152 ciab.pra |= (ciab.pra & 0xf8) | s->u.amiga.status;
153 ciab.ddra |= (ciab.ddra & 0xf8) | s->u.amiga.statusdir;
154 mb();
155}
156
157static struct parport_operations pp_amiga_ops = {
158 .write_data = amiga_write_data,
159 .read_data = amiga_read_data,
160
161 .write_control = amiga_write_control,
162 .read_control = amiga_read_control,
163 .frob_control = amiga_frob_control,
164
165 .read_status = amiga_read_status,
166
167 .enable_irq = amiga_enable_irq,
168 .disable_irq = amiga_disable_irq,
169
170 .data_forward = amiga_data_forward,
171 .data_reverse = amiga_data_reverse,
172
173 .init_state = amiga_init_state,
174 .save_state = amiga_save_state,
175 .restore_state = amiga_restore_state,
176
177 .epp_write_data = parport_ieee1284_epp_write_data,
178 .epp_read_data = parport_ieee1284_epp_read_data,
179 .epp_write_addr = parport_ieee1284_epp_write_addr,
180 .epp_read_addr = parport_ieee1284_epp_read_addr,
181
182 .ecp_write_data = parport_ieee1284_ecp_write_data,
183 .ecp_read_data = parport_ieee1284_ecp_read_data,
184 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
185
186 .compat_write_data = parport_ieee1284_write_compat,
187 .nibble_read_data = parport_ieee1284_read_nibble,
188 .byte_read_data = parport_ieee1284_read_byte,
189
190 .owner = THIS_MODULE,
191};
192
193
194
195static int __init amiga_parallel_probe(struct platform_device *pdev)
196{
197 struct parport *p;
198 int err;
199
200 ciaa.ddrb = 0xff;
201 ciab.ddra &= 0xf8;
202 mb();
203
204 p = parport_register_port((unsigned long)&ciaa.prb, IRQ_AMIGA_CIAA_FLG,
205 PARPORT_DMA_NONE, &pp_amiga_ops);
206 if (!p)
207 return -EBUSY;
208
209 err = request_irq(IRQ_AMIGA_CIAA_FLG, parport_irq_handler, 0, p->name,
210 p);
211 if (err)
212 goto out_irq;
213
214 printk(KERN_INFO "%s: Amiga built-in port using irq\n", p->name);
215
216 parport_announce_port(p);
217
218 platform_set_drvdata(pdev, p);
219
220 return 0;
221
222out_irq:
223 parport_put_port(p);
224 return err;
225}
226
227static int __exit amiga_parallel_remove(struct platform_device *pdev)
228{
229 struct parport *port = platform_get_drvdata(pdev);
230
231 parport_remove_port(port);
232 if (port->irq != PARPORT_IRQ_NONE)
233 free_irq(IRQ_AMIGA_CIAA_FLG, port);
234 parport_put_port(port);
235 return 0;
236}
237
238static struct platform_driver amiga_parallel_driver = {
239 .remove = __exit_p(amiga_parallel_remove),
240 .driver = {
241 .name = "amiga-parallel",
242 },
243};
244
245module_platform_driver_probe(amiga_parallel_driver, amiga_parallel_probe);
246
247MODULE_AUTHOR("Joerg Dorchain <joerg@dorchain.net>");
248MODULE_DESCRIPTION("Parport Driver for Amiga builtin Port");
249MODULE_SUPPORTED_DEVICE("Amiga builtin Parallel Port");
250MODULE_LICENSE("GPL");
251MODULE_ALIAS("platform:amiga-parallel");
252
