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-rw-r--r--drivers/ide/mips/Makefile1
-rw-r--r--drivers/ide/mips/swarm.c201
2 files changed, 202 insertions, 0 deletions
diff --git a/drivers/ide/mips/Makefile b/drivers/ide/mips/Makefile
new file mode 100644
index 000000000000..578e52a59588
--- /dev/null
+++ b/drivers/ide/mips/Makefile
@@ -0,0 +1 @@
obj-$(CONFIG_BLK_DEV_IDE_SWARM) += swarm.o
diff --git a/drivers/ide/mips/swarm.c b/drivers/ide/mips/swarm.c
new file mode 100644
index 000000000000..66f6064f4640
--- /dev/null
+++ b/drivers/ide/mips/swarm.c
@@ -0,0 +1,201 @@
1/*
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 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 */
22
23/*
24 * Derived loosely from ide-pmac.c, so:
25 * Copyright (C) 1998 Paul Mackerras.
26 * Copyright (C) 1995-1998 Mark Lord
27 */
28
29/*
30 * Boards with SiByte processors so far have supported IDE devices via
31 * the Generic Bus, PCI bus, and built-in PCMCIA interface. In all
32 * cases, byte-swapping must be avoided for these devices (whereas
33 * other PCI devices, for example, will require swapping). Any
34 * SiByte-targetted kernel including IDE support will include this
35 * file. Probing of a Generic Bus for an IDE device is controlled by
36 * the definition of "SIBYTE_HAVE_IDE", which is provided by
37 * <asm/sibyte/board.h> for Broadcom boards.
38 */
39
40#include <linux/ide.h>
41#include <linux/ioport.h>
42#include <linux/kernel.h>
43#include <linux/types.h>
44#include <linux/platform_device.h>
45
46#include <asm/io.h>
47
48#include <asm/sibyte/board.h>
49#include <asm/sibyte/sb1250_genbus.h>
50#include <asm/sibyte/sb1250_regs.h>
51
52#define DRV_NAME "ide-swarm"
53
54static char swarm_ide_string[] = DRV_NAME;
55
56static struct resource swarm_ide_resource = {
57 .name = "SWARM GenBus IDE",
58 .flags = IORESOURCE_MEM,
59};
60
61static struct platform_device *swarm_ide_dev;
62
63/*
64 * swarm_ide_probe - if the board header indicates the existence of
65 * Generic Bus IDE, allocate a HWIF for it.
66 */
67static int __devinit swarm_ide_probe(struct device *dev)
68{
69 ide_hwif_t *hwif;
70 u8 __iomem *base;
71 phys_t offset, size;
72 int i;
73
74 if (!SIBYTE_HAVE_IDE)
75 return -ENODEV;
76
77 /* Find an empty slot. */
78 for (i = 0; i < MAX_HWIFS; i++)
79 if (!ide_hwifs[i].io_ports[IDE_DATA_OFFSET])
80 break;
81 if (i >= MAX_HWIFS) {
82 printk(KERN_ERR DRV_NAME ": no free slot for interface\n");
83 return -ENOMEM;
84 }
85
86 hwif = ide_hwifs + i;
87
88 base = ioremap(A_IO_EXT_BASE, 0x800);
89 offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
90 size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
91 iounmap(base);
92
93 offset = G_IO_START_ADDR(offset) << S_IO_ADDRBASE;
94 size = (G_IO_MULT_SIZE(size) + 1) << S_IO_REGSIZE;
95 if (offset < A_PHYS_GENBUS || offset >= A_PHYS_GENBUS_END) {
96 printk(KERN_INFO DRV_NAME
97 ": IDE interface at GenBus disabled\n");
98 return -EBUSY;
99 }
100
101 printk(KERN_INFO DRV_NAME ": IDE interface at GenBus slot %i\n",
102 IDE_CS);
103
104 swarm_ide_resource.start = offset;
105 swarm_ide_resource.end = offset + size - 1;
106 if (request_resource(&iomem_resource, &swarm_ide_resource)) {
107 printk(KERN_ERR DRV_NAME
108 ": can't request I/O memory resource\n");
109 return -EBUSY;
110 }
111
112 base = ioremap(offset, size);
113
114 /* Setup MMIO ops. */
115 default_hwif_mmiops(hwif);
116 /* Prevent resource map manipulation. */
117 hwif->mmio = 2;
118 hwif->noprobe = 0;
119
120 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
121 hwif->hw.io_ports[i] =
122 (unsigned long)(base + ((0x1f0 + i) << 5));
123 hwif->hw.io_ports[IDE_CONTROL_OFFSET] =
124 (unsigned long)(base + (0x3f6 << 5));
125 hwif->hw.irq = K_INT_GB_IDE;
126
127 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
128 hwif->irq = hwif->hw.irq;
129
130 dev_set_drvdata(dev, hwif);
131
132 return 0;
133}
134
135static struct device_driver swarm_ide_driver = {
136 .name = swarm_ide_string,
137 .bus = &platform_bus_type,
138 .probe = swarm_ide_probe,
139};
140
141static void swarm_ide_platform_release(struct device *device)
142{
143 struct platform_device *pldev;
144
145 /* free device */
146 pldev = to_platform_device(device);
147 kfree(pldev);
148}
149
150static int __devinit swarm_ide_init_module(void)
151{
152 struct platform_device *pldev;
153 int err;
154
155 printk(KERN_INFO "SWARM IDE driver\n");
156
157 if (driver_register(&swarm_ide_driver)) {
158 printk(KERN_ERR "Driver registration failed\n");
159 err = -ENODEV;
160 goto out;
161 }
162
163 if (!(pldev = kmalloc(sizeof (*pldev), GFP_KERNEL))) {
164 err = -ENOMEM;
165 goto out_unregister_driver;
166 }
167
168 memset (pldev, 0, sizeof (*pldev));
169 pldev->name = swarm_ide_string;
170 pldev->id = 0;
171 pldev->dev.release = swarm_ide_platform_release;
172
173 if (platform_device_register(pldev)) {
174 err = -ENODEV;
175 goto out_free_pldev;
176 }
177
178 if (!pldev->dev.driver) {
179 /*
180 * The driver was not bound to this device, there was
181 * no hardware at this address. Unregister it, as the
182 * release fuction will take care of freeing the
183 * allocated structure
184 */
185 platform_device_unregister (pldev);
186 }
187
188 swarm_ide_dev = pldev;
189
190 return 0;
191
192out_free_pldev:
193 kfree(pldev);
194
195out_unregister_driver:
196 driver_unregister(&swarm_ide_driver);
197out:
198 return err;
199}
200
201module_init(swarm_ide_init_module);