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1/*
2 * Amiga Gayle IDE Driver
3 *
4 * Created 9 Jul 1997 by Geert Uytterhoeven
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive for
8 * more details.
9 */
10
11#include <linux/types.h>
12#include <linux/mm.h>
13#include <linux/interrupt.h>
14#include <linux/blkdev.h>
15#include <linux/ide.h>
16#include <linux/init.h>
17#include <linux/zorro.h>
18#include <linux/module.h>
19#include <linux/platform_device.h>
20
21#include <asm/setup.h>
22#include <asm/amigahw.h>
23#include <asm/amigaints.h>
24#include <asm/amigayle.h>
25
26
27 /*
28 * Offsets from one of the above bases
29 */
30
31#define GAYLE_CONTROL 0x101a
32
33 /*
34 * These are at different offsets from the base
35 */
36
37#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
38#define GAYLE_IRQ_1200 0xda9000 /* interrupt */
39
40
41 /*
42 * Offset of the secondary port for IDE doublers
43 * Note that GAYLE_CONTROL is NOT available then!
44 */
45
46#define GAYLE_NEXT_PORT 0x1000
47
48#define GAYLE_NUM_HWIFS 2
49#define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
50 GAYLE_NUM_HWIFS-1)
51#define GAYLE_HAS_CONTROL_REG (!ide_doubler)
52
53static bool ide_doubler;
54module_param_named(doubler, ide_doubler, bool, 0);
55MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
56
57 /*
58 * Check and acknowledge the interrupt status
59 */
60
61static int gayle_test_irq(ide_hwif_t *hwif)
62{
63 unsigned char ch;
64
65 ch = z_readb(hwif->io_ports.irq_addr);
66 if (!(ch & GAYLE_IRQ_IDE))
67 return 0;
68 return 1;
69}
70
71static void gayle_a1200_clear_irq(ide_drive_t *drive)
72{
73 ide_hwif_t *hwif = drive->hwif;
74
75 (void)z_readb(hwif->io_ports.status_addr);
76 z_writeb(0x7c, hwif->io_ports.irq_addr);
77}
78
79static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base,
80 unsigned long ctl, unsigned long irq_port)
81{
82 int i;
83
84 memset(hw, 0, sizeof(*hw));
85
86 hw->io_ports.data_addr = base;
87
88 for (i = 1; i < 8; i++)
89 hw->io_ports_array[i] = base + 2 + i * 4;
90
91 hw->io_ports.ctl_addr = ctl;
92 hw->io_ports.irq_addr = irq_port;
93
94 hw->irq = IRQ_AMIGA_PORTS;
95}
96
97static const struct ide_port_ops gayle_a4000_port_ops = {
98 .test_irq = gayle_test_irq,
99};
100
101static const struct ide_port_ops gayle_a1200_port_ops = {
102 .clear_irq = gayle_a1200_clear_irq,
103 .test_irq = gayle_test_irq,
104};
105
106static const struct ide_port_info gayle_port_info = {
107 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
108 IDE_HFLAG_NO_DMA,
109 .irq_flags = IRQF_SHARED,
110 .chipset = ide_generic,
111};
112
113 /*
114 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
115 */
116
117static int __init amiga_gayle_ide_probe(struct platform_device *pdev)
118{
119 struct resource *res;
120 struct gayle_ide_platform_data *pdata;
121 unsigned long base, ctrlport, irqport;
122 unsigned int i;
123 int error;
124 struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS];
125 struct ide_port_info d = gayle_port_info;
126 struct ide_host *host;
127
128 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
129 if (!res)
130 return -ENODEV;
131
132 if (!request_mem_region(res->start, resource_size(res), "IDE"))
133 return -EBUSY;
134
135 pdata = dev_get_platdata(&pdev->dev);
136 pr_info("ide: Gayle IDE controller (A%u style%s)\n",
137 pdata->explicit_ack ? 1200 : 4000,
138 ide_doubler ? ", IDE doubler" : "");
139
140 base = (unsigned long)ZTWO_VADDR(pdata->base);
141 ctrlport = 0;
142 irqport = (unsigned long)ZTWO_VADDR(pdata->irqport);
143 if (pdata->explicit_ack)
144 d.port_ops = &gayle_a1200_port_ops;
145 else
146 d.port_ops = &gayle_a4000_port_ops;
147
148 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++, base += GAYLE_NEXT_PORT) {
149 if (GAYLE_HAS_CONTROL_REG)
150 ctrlport = base + GAYLE_CONTROL;
151
152 gayle_setup_ports(&hw[i], base, ctrlport, irqport);
153 hws[i] = &hw[i];
154 }
155
156 error = ide_host_add(&d, hws, i, &host);
157 if (error)
158 goto out;
159
160 platform_set_drvdata(pdev, host);
161 return 0;
162
163out:
164 release_mem_region(res->start, resource_size(res));
165 return error;
166}
167
168static int __exit amiga_gayle_ide_remove(struct platform_device *pdev)
169{
170 struct ide_host *host = platform_get_drvdata(pdev);
171 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
172
173 ide_host_remove(host);
174 release_mem_region(res->start, resource_size(res));
175 return 0;
176}
177
178static struct platform_driver amiga_gayle_ide_driver = {
179 .remove = __exit_p(amiga_gayle_ide_remove),
180 .driver = {
181 .name = "amiga-gayle-ide",
182 },
183};
184
185module_platform_driver_probe(amiga_gayle_ide_driver, amiga_gayle_ide_probe);
186
187MODULE_LICENSE("GPL");
188MODULE_ALIAS("platform:amiga-gayle-ide");
1/*
2 * Amiga Gayle IDE Driver
3 *
4 * Created 9 Jul 1997 by Geert Uytterhoeven
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive for
8 * more details.
9 */
10
11#include <linux/types.h>
12#include <linux/mm.h>
13#include <linux/interrupt.h>
14#include <linux/blkdev.h>
15#include <linux/ide.h>
16#include <linux/init.h>
17#include <linux/zorro.h>
18#include <linux/module.h>
19#include <linux/platform_device.h>
20
21#include <asm/setup.h>
22#include <asm/amigahw.h>
23#include <asm/amigaints.h>
24#include <asm/amigayle.h>
25
26
27 /*
28 * Offsets from one of the above bases
29 */
30
31#define GAYLE_CONTROL 0x101a
32
33 /*
34 * These are at different offsets from the base
35 */
36
37#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
38#define GAYLE_IRQ_1200 0xda9000 /* interrupt */
39
40
41 /*
42 * Offset of the secondary port for IDE doublers
43 * Note that GAYLE_CONTROL is NOT available then!
44 */
45
46#define GAYLE_NEXT_PORT 0x1000
47
48#define GAYLE_NUM_HWIFS 2
49#define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
50 GAYLE_NUM_HWIFS-1)
51#define GAYLE_HAS_CONTROL_REG (!ide_doubler)
52
53static bool ide_doubler;
54module_param_named(doubler, ide_doubler, bool, 0);
55MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
56
57 /*
58 * Check and acknowledge the interrupt status
59 */
60
61static int gayle_test_irq(ide_hwif_t *hwif)
62{
63 unsigned char ch;
64
65 ch = z_readb(hwif->io_ports.irq_addr);
66 if (!(ch & GAYLE_IRQ_IDE))
67 return 0;
68 return 1;
69}
70
71static void gayle_a1200_clear_irq(ide_drive_t *drive)
72{
73 ide_hwif_t *hwif = drive->hwif;
74
75 (void)z_readb(hwif->io_ports.status_addr);
76 z_writeb(0x7c, hwif->io_ports.irq_addr);
77}
78
79static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base,
80 unsigned long ctl, unsigned long irq_port)
81{
82 int i;
83
84 memset(hw, 0, sizeof(*hw));
85
86 hw->io_ports.data_addr = base;
87
88 for (i = 1; i < 8; i++)
89 hw->io_ports_array[i] = base + 2 + i * 4;
90
91 hw->io_ports.ctl_addr = ctl;
92 hw->io_ports.irq_addr = irq_port;
93
94 hw->irq = IRQ_AMIGA_PORTS;
95}
96
97static const struct ide_port_ops gayle_a4000_port_ops = {
98 .test_irq = gayle_test_irq,
99};
100
101static const struct ide_port_ops gayle_a1200_port_ops = {
102 .clear_irq = gayle_a1200_clear_irq,
103 .test_irq = gayle_test_irq,
104};
105
106static const struct ide_port_info gayle_port_info = {
107 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
108 IDE_HFLAG_NO_DMA,
109 .irq_flags = IRQF_SHARED,
110 .chipset = ide_generic,
111};
112
113 /*
114 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
115 */
116
117static int __init amiga_gayle_ide_probe(struct platform_device *pdev)
118{
119 struct resource *res;
120 struct gayle_ide_platform_data *pdata;
121 unsigned long base, ctrlport, irqport;
122 unsigned int i;
123 int error;
124 struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS];
125 struct ide_port_info d = gayle_port_info;
126 struct ide_host *host;
127
128 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
129 if (!res)
130 return -ENODEV;
131
132 if (!request_mem_region(res->start, resource_size(res), "IDE"))
133 return -EBUSY;
134
135 pdata = dev_get_platdata(&pdev->dev);
136 pr_info("ide: Gayle IDE controller (A%u style%s)\n",
137 pdata->explicit_ack ? 1200 : 4000,
138 ide_doubler ? ", IDE doubler" : "");
139
140 base = (unsigned long)ZTWO_VADDR(pdata->base);
141 ctrlport = 0;
142 irqport = (unsigned long)ZTWO_VADDR(pdata->irqport);
143 if (pdata->explicit_ack)
144 d.port_ops = &gayle_a1200_port_ops;
145 else
146 d.port_ops = &gayle_a4000_port_ops;
147
148 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++, base += GAYLE_NEXT_PORT) {
149 if (GAYLE_HAS_CONTROL_REG)
150 ctrlport = base + GAYLE_CONTROL;
151
152 gayle_setup_ports(&hw[i], base, ctrlport, irqport);
153 hws[i] = &hw[i];
154 }
155
156 error = ide_host_add(&d, hws, i, &host);
157 if (error)
158 goto out;
159
160 platform_set_drvdata(pdev, host);
161 return 0;
162
163out:
164 release_mem_region(res->start, resource_size(res));
165 return error;
166}
167
168static int __exit amiga_gayle_ide_remove(struct platform_device *pdev)
169{
170 struct ide_host *host = platform_get_drvdata(pdev);
171 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
172
173 ide_host_remove(host);
174 release_mem_region(res->start, resource_size(res));
175 return 0;
176}
177
178static struct platform_driver amiga_gayle_ide_driver = {
179 .remove = __exit_p(amiga_gayle_ide_remove),
180 .driver = {
181 .name = "amiga-gayle-ide",
182 .owner = THIS_MODULE,
183 },
184};
185
186module_platform_driver_probe(amiga_gayle_ide_driver, amiga_gayle_ide_probe);
187
188MODULE_LICENSE("GPL");
189MODULE_ALIAS("platform:amiga-gayle-ide");