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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Bartlomiej Zolnierkiewicz58f189f2008-02-01 23:09:33 +01002 * Atari Falcon IDE Driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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
Al Viro88f8bb7802007-07-20 04:33:18 +010011#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/types.h>
13#include <linux/mm.h>
14#include <linux/interrupt.h>
15#include <linux/blkdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#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>
Geert Uytterhoevend1881202009-04-08 14:12:48 +020023#include <asm/ide.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
Bartlomiej Zolnierkiewiczcb5528a2008-04-26 17:36:38 +020025#define DRV_NAME "falconide"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#define ATA_HD_CONTROL 0x39
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 /*
40 * falconide_intr_lock is used to obtain access to the IDE interrupt,
41 * which is shared between several drivers.
42 */
43
Bartlomiej Zolnierkiewicze354c1d2009-03-27 12:46:22 +010044static 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}
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Bartlomiej Zolnierkiewiczadb1af92009-03-27 12:46:38 +010066static void falconide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +020067 void *buf, unsigned int len)
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +020068{
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +020069 unsigned long data_addr = drive->hwif->io_ports.data_addr;
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +020070
Geert Uytterhoevend1881202009-04-08 14:12:48 +020071 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 }
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +020075
Bartlomiej Zolnierkiewiczf94116a2009-03-27 12:46:23 +010076 raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +020077}
78
Bartlomiej Zolnierkiewiczadb1af92009-03-27 12:46:38 +010079static void falconide_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +020080 void *buf, unsigned int len)
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +020081{
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +020082 unsigned long data_addr = drive->hwif->io_ports.data_addr;
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +020083
Geert Uytterhoevend1881202009-04-08 14:12:48 +020084 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 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +020088
Bartlomiej Zolnierkiewiczf94116a2009-03-27 12:46:23 +010089 raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +020090}
91
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +020092/* 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,
Sergei Shtylyovecf3a312009-03-31 20:15:30 +020097 .write_devctl = ide_write_devctl,
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +020098
Sergei Shtylyovabb596b2009-03-31 20:15:32 +020099 .dev_select = ide_dev_select,
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200100 .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 = {
Bartlomiej Zolnierkiewicze354c1d2009-03-27 12:46:22 +0100108 .get_lock = falconide_get_lock,
109 .release_lock = falconide_release_lock,
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200110 .tp_ops = &falconide_tp_ops,
Bartlomiej Zolnierkiewicz09a3e792009-03-27 12:46:23 +0100111 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
112 IDE_HFLAG_NO_DMA,
Bartlomiej Zolnierkiewicz255115fb2009-03-27 12:46:27 +0100113 .irq_flags = IRQF_SHARED,
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200114};
115
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100116static void __init falconide_setup_ports(hw_regs_t *hw)
117{
118 int i;
119
120 memset(hw, 0, sizeof(*hw));
121
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200122 hw->io_ports.data_addr = ATA_HD_BASE;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100123
124 for (i = 1; i < 8; i++)
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200125 hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100126
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200127 hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100128
129 hw->irq = IRQ_MFP_IDE;
130 hw->ack_intr = NULL;
Bartlomiej Zolnierkiewiczd427e832008-06-10 20:56:37 +0200131
132 hw->chipset = ide_generic;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100133}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135 /*
136 * Probe for a Falcon IDE interface
137 */
138
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100139static int __init falconide_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140{
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +0200141 struct ide_host *host;
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +0200142 hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +0200143 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100145 if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +0200146 return -ENODEV;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100147
Bartlomiej Zolnierkiewiczc99c92c2008-01-26 20:13:09 +0100148 printk(KERN_INFO "ide: Falcon IDE controller\n");
149
Bartlomiej Zolnierkiewiczcb5528a2008-04-26 17:36:38 +0200150 if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) {
151 printk(KERN_ERR "%s: resources busy\n", DRV_NAME);
152 return -EBUSY;
153 }
154
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100155 falconide_setup_ports(&hw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +0200157 host = ide_host_alloc(&falconide_port_info, hws);
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +0200158 if (host == NULL) {
159 rc = -ENOMEM;
160 goto err;
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100161 }
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100162
Bartlomiej Zolnierkiewicze354c1d2009-03-27 12:46:22 +0100163 falconide_get_lock(NULL, NULL);
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +0200164 rc = ide_host_register(host, &falconide_port_info, hws);
Bartlomiej Zolnierkiewicze354c1d2009-03-27 12:46:22 +0100165 falconide_release_lock();
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +0200166
167 if (rc)
168 goto err_free;
169
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100170 return 0;
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +0200171err_free:
172 ide_host_free(host);
173err:
174 release_mem_region(ATA_HD_BASE, 0x40);
175 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176}
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100177
178module_init(falconide_init);
Adrian Bunk0c5ec972008-04-02 21:22:04 +0200179
180MODULE_LICENSE("GPL");