ARM: drivers: remove __dev* attributes.
[linux-3.10.git] / arch / arm / mach-omap1 / mailbox.c
1 /*
2  * Mailbox reservation modules for OMAP1
3  *
4  * Copyright (C) 2006-2009 Nokia Corporation
5  * Written by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
6  *
7  * This file is subject to the terms and conditions of the GNU General Public
8  * License.  See the file "COPYING" in the main directory of this archive
9  * for more details.
10  */
11
12 #include <linux/module.h>
13 #include <linux/interrupt.h>
14 #include <linux/platform_device.h>
15 #include <linux/io.h>
16 #include <plat/mailbox.h>
17
18 #define MAILBOX_ARM2DSP1                0x00
19 #define MAILBOX_ARM2DSP1b               0x04
20 #define MAILBOX_DSP2ARM1                0x08
21 #define MAILBOX_DSP2ARM1b               0x0c
22 #define MAILBOX_DSP2ARM2                0x10
23 #define MAILBOX_DSP2ARM2b               0x14
24 #define MAILBOX_ARM2DSP1_Flag           0x18
25 #define MAILBOX_DSP2ARM1_Flag           0x1c
26 #define MAILBOX_DSP2ARM2_Flag           0x20
27
28 static void __iomem *mbox_base;
29
30 struct omap_mbox1_fifo {
31         unsigned long cmd;
32         unsigned long data;
33         unsigned long flag;
34 };
35
36 struct omap_mbox1_priv {
37         struct omap_mbox1_fifo tx_fifo;
38         struct omap_mbox1_fifo rx_fifo;
39 };
40
41 static inline int mbox_read_reg(size_t ofs)
42 {
43         return __raw_readw(mbox_base + ofs);
44 }
45
46 static inline void mbox_write_reg(u32 val, size_t ofs)
47 {
48         __raw_writew(val, mbox_base + ofs);
49 }
50
51 /* msg */
52 static mbox_msg_t omap1_mbox_fifo_read(struct omap_mbox *mbox)
53 {
54         struct omap_mbox1_fifo *fifo =
55                 &((struct omap_mbox1_priv *)mbox->priv)->rx_fifo;
56         mbox_msg_t msg;
57
58         msg = mbox_read_reg(fifo->data);
59         msg |= ((mbox_msg_t) mbox_read_reg(fifo->cmd)) << 16;
60
61         return msg;
62 }
63
64 static void
65 omap1_mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
66 {
67         struct omap_mbox1_fifo *fifo =
68                 &((struct omap_mbox1_priv *)mbox->priv)->tx_fifo;
69
70         mbox_write_reg(msg & 0xffff, fifo->data);
71         mbox_write_reg(msg >> 16, fifo->cmd);
72 }
73
74 static int omap1_mbox_fifo_empty(struct omap_mbox *mbox)
75 {
76         return 0;
77 }
78
79 static int omap1_mbox_fifo_full(struct omap_mbox *mbox)
80 {
81         struct omap_mbox1_fifo *fifo =
82                 &((struct omap_mbox1_priv *)mbox->priv)->rx_fifo;
83
84         return mbox_read_reg(fifo->flag);
85 }
86
87 /* irq */
88 static void
89 omap1_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_type_t irq)
90 {
91         if (irq == IRQ_RX)
92                 enable_irq(mbox->irq);
93 }
94
95 static void
96 omap1_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_type_t irq)
97 {
98         if (irq == IRQ_RX)
99                 disable_irq(mbox->irq);
100 }
101
102 static int
103 omap1_mbox_is_irq(struct omap_mbox *mbox, omap_mbox_type_t irq)
104 {
105         if (irq == IRQ_TX)
106                 return 0;
107         return 1;
108 }
109
110 static struct omap_mbox_ops omap1_mbox_ops = {
111         .type           = OMAP_MBOX_TYPE1,
112         .fifo_read      = omap1_mbox_fifo_read,
113         .fifo_write     = omap1_mbox_fifo_write,
114         .fifo_empty     = omap1_mbox_fifo_empty,
115         .fifo_full      = omap1_mbox_fifo_full,
116         .enable_irq     = omap1_mbox_enable_irq,
117         .disable_irq    = omap1_mbox_disable_irq,
118         .is_irq         = omap1_mbox_is_irq,
119 };
120
121 /* FIXME: the following struct should be created automatically by the user id */
122
123 /* DSP */
124 static struct omap_mbox1_priv omap1_mbox_dsp_priv = {
125         .tx_fifo = {
126                 .cmd    = MAILBOX_ARM2DSP1b,
127                 .data   = MAILBOX_ARM2DSP1,
128                 .flag   = MAILBOX_ARM2DSP1_Flag,
129         },
130         .rx_fifo = {
131                 .cmd    = MAILBOX_DSP2ARM1b,
132                 .data   = MAILBOX_DSP2ARM1,
133                 .flag   = MAILBOX_DSP2ARM1_Flag,
134         },
135 };
136
137 static struct omap_mbox mbox_dsp_info = {
138         .name   = "dsp",
139         .ops    = &omap1_mbox_ops,
140         .priv   = &omap1_mbox_dsp_priv,
141 };
142
143 static struct omap_mbox *omap1_mboxes[] = { &mbox_dsp_info, NULL };
144
145 static int omap1_mbox_probe(struct platform_device *pdev)
146 {
147         struct resource *mem;
148         int ret;
149         struct omap_mbox **list;
150
151         list = omap1_mboxes;
152         list[0]->irq = platform_get_irq_byname(pdev, "dsp");
153
154         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
155         mbox_base = ioremap(mem->start, resource_size(mem));
156         if (!mbox_base)
157                 return -ENOMEM;
158
159         ret = omap_mbox_register(&pdev->dev, list);
160         if (ret) {
161                 iounmap(mbox_base);
162                 return ret;
163         }
164
165         return 0;
166 }
167
168 static int omap1_mbox_remove(struct platform_device *pdev)
169 {
170         omap_mbox_unregister();
171         iounmap(mbox_base);
172         return 0;
173 }
174
175 static struct platform_driver omap1_mbox_driver = {
176         .probe  = omap1_mbox_probe,
177         .remove = omap1_mbox_remove,
178         .driver = {
179                 .name   = "omap-mailbox",
180         },
181 };
182
183 static int __init omap1_mbox_init(void)
184 {
185         return platform_driver_register(&omap1_mbox_driver);
186 }
187
188 static void __exit omap1_mbox_exit(void)
189 {
190         platform_driver_unregister(&omap1_mbox_driver);
191 }
192
193 module_init(omap1_mbox_init);
194 module_exit(omap1_mbox_exit);
195
196 MODULE_LICENSE("GPL v2");
197 MODULE_DESCRIPTION("omap mailbox: omap1 architecture specific functions");
198 MODULE_AUTHOR("Hiroshi DOYU <Hiroshi.DOYU@nokia.com>");
199 MODULE_ALIAS("platform:omap1-mailbox");