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1/*
2 * Atari Falcon IDE Driver
3 *
4 * Created 12 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/module.h>
12#include <linux/types.h>
13#include <linux/mm.h>
14#include <linux/interrupt.h>
15#include <linux/blkdev.h>
16#include <linux/ide.h>
17#include <linux/init.h>
18#include <linux/platform_device.h>
19
20#include <asm/setup.h>
21#include <asm/atarihw.h>
22#include <asm/atariints.h>
23#include <asm/atari_stdma.h>
24#include <asm/ide.h>
25
26#define DRV_NAME "falconide"
27
28 /*
29 * Offsets from base address
30 */
31
32#define ATA_HD_CONTROL 0x39
33
34 /*
35 * falconide_intr_lock is used to obtain access to the IDE interrupt,
36 * which is shared between several drivers.
37 */
38
39static int falconide_intr_lock;
40
41static void falconide_release_lock(void)
42{
43 if (falconide_intr_lock == 0) {
44 printk(KERN_ERR "%s: bug\n", __func__);
45 return;
46 }
47 falconide_intr_lock = 0;
48 stdma_release();
49}
50
51static void falconide_get_lock(irq_handler_t handler, void *data)
52{
53 if (falconide_intr_lock == 0) {
54 if (in_interrupt() > 0)
55 panic("Falcon IDE hasn't ST-DMA lock in interrupt");
56 stdma_lock(handler, data);
57 falconide_intr_lock = 1;
58 }
59}
60
61static void falconide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
62 void *buf, unsigned int len)
63{
64 unsigned long data_addr = drive->hwif->io_ports.data_addr;
65
66 if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
67 __ide_mm_insw(data_addr, buf, (len + 1) / 2);
68 return;
69 }
70
71 raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
72}
73
74static void falconide_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
75 void *buf, unsigned int len)
76{
77 unsigned long data_addr = drive->hwif->io_ports.data_addr;
78
79 if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
80 __ide_mm_outsw(data_addr, buf, (len + 1) / 2);
81 return;
82 }
83
84 raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
85}
86
87/* Atari has a byte-swapped IDE interface */
88static const struct ide_tp_ops falconide_tp_ops = {
89 .exec_command = ide_exec_command,
90 .read_status = ide_read_status,
91 .read_altstatus = ide_read_altstatus,
92 .write_devctl = ide_write_devctl,
93
94 .dev_select = ide_dev_select,
95 .tf_load = ide_tf_load,
96 .tf_read = ide_tf_read,
97
98 .input_data = falconide_input_data,
99 .output_data = falconide_output_data,
100};
101
102static const struct ide_port_info falconide_port_info = {
103 .get_lock = falconide_get_lock,
104 .release_lock = falconide_release_lock,
105 .tp_ops = &falconide_tp_ops,
106 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
107 IDE_HFLAG_NO_DMA,
108 .irq_flags = IRQF_SHARED,
109 .chipset = ide_generic,
110};
111
112static void __init falconide_setup_ports(struct ide_hw *hw, unsigned long base)
113{
114 int i;
115
116 memset(hw, 0, sizeof(*hw));
117
118 hw->io_ports.data_addr = base;
119
120 for (i = 1; i < 8; i++)
121 hw->io_ports_array[i] = base + 1 + i * 4;
122
123 hw->io_ports.ctl_addr = base + ATA_HD_CONTROL;
124
125 hw->irq = IRQ_MFP_IDE;
126}
127
128 /*
129 * Probe for a Falcon IDE interface
130 */
131
132static int __init falconide_init(struct platform_device *pdev)
133{
134 struct resource *res;
135 struct ide_host *host;
136 struct ide_hw hw, *hws[] = { &hw };
137 unsigned long base;
138 int rc;
139
140 dev_info(&pdev->dev, "Atari Falcon IDE controller\n");
141
142 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
143 if (!res)
144 return -ENODEV;
145
146 if (!devm_request_mem_region(&pdev->dev, res->start,
147 resource_size(res), DRV_NAME)) {
148 dev_err(&pdev->dev, "resources busy\n");
149 return -EBUSY;
150 }
151
152 base = (unsigned long)res->start;
153
154 falconide_setup_ports(&hw, base);
155
156 host = ide_host_alloc(&falconide_port_info, hws, 1);
157 if (host == NULL) {
158 rc = -ENOMEM;
159 goto err;
160 }
161
162 falconide_get_lock(NULL, NULL);
163 rc = ide_host_register(host, &falconide_port_info, hws);
164 falconide_release_lock();
165
166 if (rc)
167 goto err_free;
168
169 return 0;
170err_free:
171 ide_host_free(host);
172err:
173 release_mem_region(res->start, resource_size(res));
174 return rc;
175}
176
177static int falconide_remove(struct platform_device *pdev)
178{
179 struct ide_host *host = dev_get_drvdata(&pdev->dev);
180
181 ide_host_remove(host);
182
183 return 0;
184}
185
186static struct platform_driver ide_falcon_driver = {
187 .remove = falconide_remove,
188 .driver = {
189 .name = "atari-falcon-ide",
190 },
191};
192
193module_platform_driver_probe(ide_falcon_driver, falconide_init);
194
195MODULE_AUTHOR("Geert Uytterhoeven");
196MODULE_DESCRIPTION("low-level driver for Atari Falcon IDE");
197MODULE_LICENSE("GPL");
198MODULE_ALIAS("platform:atari-falcon-ide");
1/*
2 * Atari Falcon IDE Driver
3 *
4 * Created 12 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/module.h>
12#include <linux/types.h>
13#include <linux/mm.h>
14#include <linux/interrupt.h>
15#include <linux/blkdev.h>
16#include <linux/ide.h>
17#include <linux/init.h>
18
19#include <asm/setup.h>
20#include <asm/atarihw.h>
21#include <asm/atariints.h>
22#include <asm/atari_stdma.h>
23#include <asm/ide.h>
24
25#define DRV_NAME "falconide"
26
27 /*
28 * Base of the IDE interface
29 */
30
31#define ATA_HD_BASE 0xfff00000
32
33 /*
34 * Offsets from the above base
35 */
36
37#define ATA_HD_CONTROL 0x39
38
39 /*
40 * falconide_intr_lock is used to obtain access to the IDE interrupt,
41 * which is shared between several drivers.
42 */
43
44static int falconide_intr_lock;
45
46static void falconide_release_lock(void)
47{
48 if (falconide_intr_lock == 0) {
49 printk(KERN_ERR "%s: bug\n", __func__);
50 return;
51 }
52 falconide_intr_lock = 0;
53 stdma_release();
54}
55
56static void falconide_get_lock(irq_handler_t handler, void *data)
57{
58 if (falconide_intr_lock == 0) {
59 if (in_interrupt() > 0)
60 panic("Falcon IDE hasn't ST-DMA lock in interrupt");
61 stdma_lock(handler, data);
62 falconide_intr_lock = 1;
63 }
64}
65
66static void falconide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
67 void *buf, unsigned int len)
68{
69 unsigned long data_addr = drive->hwif->io_ports.data_addr;
70
71 if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
72 __ide_mm_insw(data_addr, buf, (len + 1) / 2);
73 return;
74 }
75
76 raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
77}
78
79static void falconide_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
80 void *buf, unsigned int len)
81{
82 unsigned long data_addr = drive->hwif->io_ports.data_addr;
83
84 if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
85 __ide_mm_outsw(data_addr, buf, (len + 1) / 2);
86 return;
87 }
88
89 raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
90}
91
92/* Atari has a byte-swapped IDE interface */
93static const struct ide_tp_ops falconide_tp_ops = {
94 .exec_command = ide_exec_command,
95 .read_status = ide_read_status,
96 .read_altstatus = ide_read_altstatus,
97 .write_devctl = ide_write_devctl,
98
99 .dev_select = ide_dev_select,
100 .tf_load = ide_tf_load,
101 .tf_read = ide_tf_read,
102
103 .input_data = falconide_input_data,
104 .output_data = falconide_output_data,
105};
106
107static const struct ide_port_info falconide_port_info = {
108 .get_lock = falconide_get_lock,
109 .release_lock = falconide_release_lock,
110 .tp_ops = &falconide_tp_ops,
111 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
112 IDE_HFLAG_NO_DMA,
113 .irq_flags = IRQF_SHARED,
114 .chipset = ide_generic,
115};
116
117static void __init falconide_setup_ports(struct ide_hw *hw)
118{
119 int i;
120
121 memset(hw, 0, sizeof(*hw));
122
123 hw->io_ports.data_addr = ATA_HD_BASE;
124
125 for (i = 1; i < 8; i++)
126 hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4;
127
128 hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL;
129
130 hw->irq = IRQ_MFP_IDE;
131}
132
133 /*
134 * Probe for a Falcon IDE interface
135 */
136
137static int __init falconide_init(void)
138{
139 struct ide_host *host;
140 struct ide_hw hw, *hws[] = { &hw };
141 int rc;
142
143 if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
144 return -ENODEV;
145
146 printk(KERN_INFO "ide: Falcon IDE controller\n");
147
148 if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) {
149 printk(KERN_ERR "%s: resources busy\n", DRV_NAME);
150 return -EBUSY;
151 }
152
153 falconide_setup_ports(&hw);
154
155 host = ide_host_alloc(&falconide_port_info, hws, 1);
156 if (host == NULL) {
157 rc = -ENOMEM;
158 goto err;
159 }
160
161 falconide_get_lock(NULL, NULL);
162 rc = ide_host_register(host, &falconide_port_info, hws);
163 falconide_release_lock();
164
165 if (rc)
166 goto err_free;
167
168 return 0;
169err_free:
170 ide_host_free(host);
171err:
172 release_mem_region(ATA_HD_BASE, 0x40);
173 return rc;
174}
175
176module_init(falconide_init);
177
178MODULE_LICENSE("GPL");