2 * Copyright (C) 2001, 2002, 2003 Broadcom Corporation
3 * Copyright (C) 2004 MontaVista Software Inc.
4 * Author: Manish Lachwani, mlachwani@mvista.com
5 * Copyright (C) 2004 MIPS Technologies, Inc. All rights reserved.
6 * Author: Maciej W. Rozycki <macro@mips.com>
7 * Copyright (c) 2006 Maciej W. Rozycki
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version 2
12 * of the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 * Derived loosely from ide-pmac.c, so:
26 * Copyright (C) 1998 Paul Mackerras.
27 * Copyright (C) 1995-1998 Mark Lord
31 * Boards with SiByte processors so far have supported IDE devices via
32 * the Generic Bus, PCI bus, and built-in PCMCIA interface. In all
33 * cases, byte-swapping must be avoided for these devices (whereas
34 * other PCI devices, for example, will require swapping). Any
35 * SiByte-targetted kernel including IDE support will include this
36 * file. Probing of a Generic Bus for an IDE device is controlled by
37 * the definition of "SIBYTE_HAVE_IDE", which is provided by
38 * <asm/sibyte/board.h> for Broadcom boards.
41 #include <linux/ide.h>
42 #include <linux/ioport.h>
43 #include <linux/kernel.h>
44 #include <linux/types.h>
45 #include <linux/platform_device.h>
49 #include <asm/sibyte/board.h>
50 #include <asm/sibyte/sb1250_genbus.h>
51 #include <asm/sibyte/sb1250_regs.h>
53 #define DRV_NAME "ide-swarm"
55 static char swarm_ide_string
[] = DRV_NAME
;
57 static struct resource swarm_ide_resource
= {
58 .name
= "SWARM GenBus IDE",
59 .flags
= IORESOURCE_MEM
,
62 static struct platform_device
*swarm_ide_dev
;
65 * swarm_ide_probe - if the board header indicates the existence of
66 * Generic Bus IDE, allocate a HWIF for it.
68 static int __devinit
swarm_ide_probe(struct device
*dev
)
74 u8 idx
[4] = { 0xff, 0xff, 0xff, 0xff };
79 hwif
= ide_find_port();
81 printk(KERN_ERR DRV_NAME
": no free slot for interface\n");
85 base
= ioremap(A_IO_EXT_BASE
, 0x800);
86 offset
= __raw_readq(base
+ R_IO_EXT_REG(R_IO_EXT_START_ADDR
, IDE_CS
));
87 size
= __raw_readq(base
+ R_IO_EXT_REG(R_IO_EXT_MULT_SIZE
, IDE_CS
));
90 offset
= G_IO_START_ADDR(offset
) << S_IO_ADDRBASE
;
91 size
= (G_IO_MULT_SIZE(size
) + 1) << S_IO_REGSIZE
;
92 if (offset
< A_PHYS_GENBUS
|| offset
>= A_PHYS_GENBUS_END
) {
93 printk(KERN_INFO DRV_NAME
94 ": IDE interface at GenBus disabled\n");
98 printk(KERN_INFO DRV_NAME
": IDE interface at GenBus slot %i\n",
101 swarm_ide_resource
.start
= offset
;
102 swarm_ide_resource
.end
= offset
+ size
- 1;
103 if (request_resource(&iomem_resource
, &swarm_ide_resource
)) {
104 printk(KERN_ERR DRV_NAME
105 ": can't request I/O memory resource\n");
109 base
= ioremap(offset
, size
);
111 /* Setup MMIO ops. */
112 default_hwif_mmiops(hwif
);
114 hwif
->chipset
= ide_generic
;
116 for (i
= IDE_DATA_OFFSET
; i
<= IDE_STATUS_OFFSET
; i
++)
118 (unsigned long)(base
+ ((0x1f0 + i
) << 5));
119 hwif
->io_ports
[IDE_CONTROL_OFFSET
] =
120 (unsigned long)(base
+ (0x3f6 << 5));
121 hwif
->irq
= K_INT_GB_IDE
;
123 idx
[0] = hwif
->index
;
125 ide_device_add(idx
, NULL
);
127 dev_set_drvdata(dev
, hwif
);
132 static struct device_driver swarm_ide_driver
= {
133 .name
= swarm_ide_string
,
134 .bus
= &platform_bus_type
,
135 .probe
= swarm_ide_probe
,
138 static void swarm_ide_platform_release(struct device
*device
)
140 struct platform_device
*pldev
;
143 pldev
= to_platform_device(device
);
147 static int __devinit
swarm_ide_init_module(void)
149 struct platform_device
*pldev
;
152 printk(KERN_INFO
"SWARM IDE driver\n");
154 if (driver_register(&swarm_ide_driver
)) {
155 printk(KERN_ERR
"Driver registration failed\n");
160 if (!(pldev
= kzalloc(sizeof (*pldev
), GFP_KERNEL
))) {
162 goto out_unregister_driver
;
165 pldev
->name
= swarm_ide_string
;
167 pldev
->dev
.release
= swarm_ide_platform_release
;
169 if (platform_device_register(pldev
)) {
174 if (!pldev
->dev
.driver
) {
176 * The driver was not bound to this device, there was
177 * no hardware at this address. Unregister it, as the
178 * release fuction will take care of freeing the
179 * allocated structure
181 platform_device_unregister (pldev
);
184 swarm_ide_dev
= pldev
;
191 out_unregister_driver
:
192 driver_unregister(&swarm_ide_driver
);
197 module_init(swarm_ide_init_module
);