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1/* Low-level parallel port routines for the Atari builtin port
2 *
3 * Author: Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
4 *
5 * Based on parport_amiga.c.
6 *
7 * The built-in Atari parallel port provides one port at a fixed address
8 * with 8 output data lines (D0 - D7), 1 output control line (STROBE)
9 * and 1 input status line (BUSY) able to cause an interrupt.
10 */
11
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/parport.h>
15#include <linux/interrupt.h>
16#include <asm/setup.h>
17#include <asm/atarihw.h>
18#include <asm/irq.h>
19#include <asm/atariints.h>
20
21static struct parport *this_port = NULL;
22
23static unsigned char
24parport_atari_read_data(struct parport *p)
25{
26 unsigned long flags;
27 unsigned char data;
28
29 local_irq_save(flags);
30 sound_ym.rd_data_reg_sel = 15;
31 data = sound_ym.rd_data_reg_sel;
32 local_irq_restore(flags);
33 return data;
34}
35
36static void
37parport_atari_write_data(struct parport *p, unsigned char data)
38{
39 unsigned long flags;
40
41 local_irq_save(flags);
42 sound_ym.rd_data_reg_sel = 15;
43 sound_ym.wd_data = data;
44 local_irq_restore(flags);
45}
46
47static unsigned char
48parport_atari_read_control(struct parport *p)
49{
50 unsigned long flags;
51 unsigned char control = 0;
52
53 local_irq_save(flags);
54 sound_ym.rd_data_reg_sel = 14;
55 if (!(sound_ym.rd_data_reg_sel & (1 << 5)))
56 control = PARPORT_CONTROL_STROBE;
57 local_irq_restore(flags);
58 return control;
59}
60
61static void
62parport_atari_write_control(struct parport *p, unsigned char control)
63{
64 unsigned long flags;
65
66 local_irq_save(flags);
67 sound_ym.rd_data_reg_sel = 14;
68 if (control & PARPORT_CONTROL_STROBE)
69 sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~(1 << 5);
70 else
71 sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5);
72 local_irq_restore(flags);
73}
74
75static unsigned char
76parport_atari_frob_control(struct parport *p, unsigned char mask,
77 unsigned char val)
78{
79 unsigned char old = parport_atari_read_control(p);
80 parport_atari_write_control(p, (old & ~mask) ^ val);
81 return old;
82}
83
84static unsigned char
85parport_atari_read_status(struct parport *p)
86{
87 return ((st_mfp.par_dt_reg & 1 ? 0 : PARPORT_STATUS_BUSY) |
88 PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR);
89}
90
91static void
92parport_atari_init_state(struct pardevice *d, struct parport_state *s)
93{
94}
95
96static void
97parport_atari_save_state(struct parport *p, struct parport_state *s)
98{
99}
100
101static void
102parport_atari_restore_state(struct parport *p, struct parport_state *s)
103{
104}
105
106static void
107parport_atari_enable_irq(struct parport *p)
108{
109 enable_irq(IRQ_MFP_BUSY);
110}
111
112static void
113parport_atari_disable_irq(struct parport *p)
114{
115 disable_irq(IRQ_MFP_BUSY);
116}
117
118static void
119parport_atari_data_forward(struct parport *p)
120{
121 unsigned long flags;
122
123 local_irq_save(flags);
124 /* Soundchip port B as output. */
125 sound_ym.rd_data_reg_sel = 7;
126 sound_ym.wd_data = sound_ym.rd_data_reg_sel | 0x40;
127 local_irq_restore(flags);
128}
129
130static void
131parport_atari_data_reverse(struct parport *p)
132{
133#if 0 /* too dangerous, can kill sound chip */
134 unsigned long flags;
135
136 local_irq_save(flags);
137 /* Soundchip port B as input. */
138 sound_ym.rd_data_reg_sel = 7;
139 sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~0x40;
140 local_irq_restore(flags);
141#endif
142}
143
144static struct parport_operations parport_atari_ops = {
145 .write_data = parport_atari_write_data,
146 .read_data = parport_atari_read_data,
147
148 .write_control = parport_atari_write_control,
149 .read_control = parport_atari_read_control,
150 .frob_control = parport_atari_frob_control,
151
152 .read_status = parport_atari_read_status,
153
154 .enable_irq = parport_atari_enable_irq,
155 .disable_irq = parport_atari_disable_irq,
156
157 .data_forward = parport_atari_data_forward,
158 .data_reverse = parport_atari_data_reverse,
159
160 .init_state = parport_atari_init_state,
161 .save_state = parport_atari_save_state,
162 .restore_state = parport_atari_restore_state,
163
164 .epp_write_data = parport_ieee1284_epp_write_data,
165 .epp_read_data = parport_ieee1284_epp_read_data,
166 .epp_write_addr = parport_ieee1284_epp_write_addr,
167 .epp_read_addr = parport_ieee1284_epp_read_addr,
168
169 .ecp_write_data = parport_ieee1284_ecp_write_data,
170 .ecp_read_data = parport_ieee1284_ecp_read_data,
171 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
172
173 .compat_write_data = parport_ieee1284_write_compat,
174 .nibble_read_data = parport_ieee1284_read_nibble,
175 .byte_read_data = parport_ieee1284_read_byte,
176
177 .owner = THIS_MODULE,
178};
179
180
181static int __init parport_atari_init(void)
182{
183 struct parport *p;
184 unsigned long flags;
185
186 if (MACH_IS_ATARI) {
187 local_irq_save(flags);
188 /* Soundchip port A/B as output. */
189 sound_ym.rd_data_reg_sel = 7;
190 sound_ym.wd_data = (sound_ym.rd_data_reg_sel & 0x3f) | 0xc0;
191 /* STROBE high. */
192 sound_ym.rd_data_reg_sel = 14;
193 sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5);
194 local_irq_restore(flags);
195 /* MFP port I0 as input. */
196 st_mfp.data_dir &= ~1;
197 /* MFP port I0 interrupt on high->low edge. */
198 st_mfp.active_edge &= ~1;
199 p = parport_register_port((unsigned long)&sound_ym.wd_data,
200 IRQ_MFP_BUSY, PARPORT_DMA_NONE,
201 &parport_atari_ops);
202 if (!p)
203 return -ENODEV;
204 if (request_irq(IRQ_MFP_BUSY, parport_irq_handler,
205 IRQ_TYPE_SLOW, p->name, p)) {
206 parport_put_port (p);
207 return -ENODEV;
208 }
209
210 this_port = p;
211 printk(KERN_INFO "%s: Atari built-in port using irq\n", p->name);
212 parport_announce_port (p);
213
214 return 0;
215 }
216 return -ENODEV;
217}
218
219static void __exit parport_atari_exit(void)
220{
221 parport_remove_port(this_port);
222 if (this_port->irq != PARPORT_IRQ_NONE)
223 free_irq(IRQ_MFP_BUSY, this_port);
224 parport_put_port(this_port);
225}
226
227MODULE_AUTHOR("Andreas Schwab");
228MODULE_DESCRIPTION("Parport Driver for Atari builtin Port");
229MODULE_SUPPORTED_DEVICE("Atari builtin Parallel Port");
230MODULE_LICENSE("GPL");
231
232module_init(parport_atari_init)
233module_exit(parport_atari_exit)
1/* Low-level parallel port routines for the Atari builtin port
2 *
3 * Author: Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
4 *
5 * Based on parport_amiga.c.
6 *
7 * The built-in Atari parallel port provides one port at a fixed address
8 * with 8 output data lines (D0 - D7), 1 output control line (STROBE)
9 * and 1 input status line (BUSY) able to cause an interrupt.
10 */
11
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/parport.h>
15#include <linux/interrupt.h>
16#include <asm/setup.h>
17#include <asm/atarihw.h>
18#include <asm/irq.h>
19#include <asm/atariints.h>
20
21static struct parport *this_port = NULL;
22
23static unsigned char
24parport_atari_read_data(struct parport *p)
25{
26 unsigned long flags;
27 unsigned char data;
28
29 local_irq_save(flags);
30 sound_ym.rd_data_reg_sel = 15;
31 data = sound_ym.rd_data_reg_sel;
32 local_irq_restore(flags);
33 return data;
34}
35
36static void
37parport_atari_write_data(struct parport *p, unsigned char data)
38{
39 unsigned long flags;
40
41 local_irq_save(flags);
42 sound_ym.rd_data_reg_sel = 15;
43 sound_ym.wd_data = data;
44 local_irq_restore(flags);
45}
46
47static unsigned char
48parport_atari_read_control(struct parport *p)
49{
50 unsigned long flags;
51 unsigned char control = 0;
52
53 local_irq_save(flags);
54 sound_ym.rd_data_reg_sel = 14;
55 if (!(sound_ym.rd_data_reg_sel & (1 << 5)))
56 control = PARPORT_CONTROL_STROBE;
57 local_irq_restore(flags);
58 return control;
59}
60
61static void
62parport_atari_write_control(struct parport *p, unsigned char control)
63{
64 unsigned long flags;
65
66 local_irq_save(flags);
67 sound_ym.rd_data_reg_sel = 14;
68 if (control & PARPORT_CONTROL_STROBE)
69 sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~(1 << 5);
70 else
71 sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5);
72 local_irq_restore(flags);
73}
74
75static unsigned char
76parport_atari_frob_control(struct parport *p, unsigned char mask,
77 unsigned char val)
78{
79 unsigned char old = parport_atari_read_control(p);
80 parport_atari_write_control(p, (old & ~mask) ^ val);
81 return old;
82}
83
84static unsigned char
85parport_atari_read_status(struct parport *p)
86{
87 return ((st_mfp.par_dt_reg & 1 ? 0 : PARPORT_STATUS_BUSY) |
88 PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR);
89}
90
91static void
92parport_atari_init_state(struct pardevice *d, struct parport_state *s)
93{
94}
95
96static void
97parport_atari_save_state(struct parport *p, struct parport_state *s)
98{
99}
100
101static void
102parport_atari_restore_state(struct parport *p, struct parport_state *s)
103{
104}
105
106static void
107parport_atari_enable_irq(struct parport *p)
108{
109 enable_irq(IRQ_MFP_BUSY);
110}
111
112static void
113parport_atari_disable_irq(struct parport *p)
114{
115 disable_irq(IRQ_MFP_BUSY);
116}
117
118static void
119parport_atari_data_forward(struct parport *p)
120{
121 unsigned long flags;
122
123 local_irq_save(flags);
124 /* Soundchip port B as output. */
125 sound_ym.rd_data_reg_sel = 7;
126 sound_ym.wd_data = sound_ym.rd_data_reg_sel | 0x40;
127 local_irq_restore(flags);
128}
129
130static void
131parport_atari_data_reverse(struct parport *p)
132{
133}
134
135static struct parport_operations parport_atari_ops = {
136 .write_data = parport_atari_write_data,
137 .read_data = parport_atari_read_data,
138
139 .write_control = parport_atari_write_control,
140 .read_control = parport_atari_read_control,
141 .frob_control = parport_atari_frob_control,
142
143 .read_status = parport_atari_read_status,
144
145 .enable_irq = parport_atari_enable_irq,
146 .disable_irq = parport_atari_disable_irq,
147
148 .data_forward = parport_atari_data_forward,
149 .data_reverse = parport_atari_data_reverse,
150
151 .init_state = parport_atari_init_state,
152 .save_state = parport_atari_save_state,
153 .restore_state = parport_atari_restore_state,
154
155 .epp_write_data = parport_ieee1284_epp_write_data,
156 .epp_read_data = parport_ieee1284_epp_read_data,
157 .epp_write_addr = parport_ieee1284_epp_write_addr,
158 .epp_read_addr = parport_ieee1284_epp_read_addr,
159
160 .ecp_write_data = parport_ieee1284_ecp_write_data,
161 .ecp_read_data = parport_ieee1284_ecp_read_data,
162 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
163
164 .compat_write_data = parport_ieee1284_write_compat,
165 .nibble_read_data = parport_ieee1284_read_nibble,
166 .byte_read_data = parport_ieee1284_read_byte,
167
168 .owner = THIS_MODULE,
169};
170
171
172static int __init parport_atari_init(void)
173{
174 struct parport *p;
175 unsigned long flags;
176
177 if (MACH_IS_ATARI) {
178 local_irq_save(flags);
179 /* Soundchip port A/B as output. */
180 sound_ym.rd_data_reg_sel = 7;
181 sound_ym.wd_data = (sound_ym.rd_data_reg_sel & 0x3f) | 0xc0;
182 /* STROBE high. */
183 sound_ym.rd_data_reg_sel = 14;
184 sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5);
185 local_irq_restore(flags);
186 /* MFP port I0 as input. */
187 st_mfp.data_dir &= ~1;
188 /* MFP port I0 interrupt on high->low edge. */
189 st_mfp.active_edge &= ~1;
190 p = parport_register_port((unsigned long)&sound_ym.wd_data,
191 IRQ_MFP_BUSY, PARPORT_DMA_NONE,
192 &parport_atari_ops);
193 if (!p)
194 return -ENODEV;
195 if (request_irq(IRQ_MFP_BUSY, parport_irq_handler,
196 IRQ_TYPE_SLOW, p->name, p)) {
197 parport_put_port (p);
198 return -ENODEV;
199 }
200
201 this_port = p;
202 printk(KERN_INFO "%s: Atari built-in port using irq\n", p->name);
203 parport_announce_port (p);
204
205 return 0;
206 }
207 return -ENODEV;
208}
209
210static void __exit parport_atari_exit(void)
211{
212 parport_remove_port(this_port);
213 if (this_port->irq != PARPORT_IRQ_NONE)
214 free_irq(IRQ_MFP_BUSY, this_port);
215 parport_put_port(this_port);
216}
217
218MODULE_AUTHOR("Andreas Schwab");
219MODULE_DESCRIPTION("Parport Driver for Atari builtin Port");
220MODULE_SUPPORTED_DEVICE("Atari builtin Parallel Port");
221MODULE_LICENSE("GPL");
222
223module_init(parport_atari_init)
224module_exit(parport_atari_exit)