[ARM] 2894/1: Sharp Scoop driver pm_message_t type fix
[linux-2.6.git] / arch / arm / common / scoop.c
1 /*
2  * Support code for the SCOOP interface found on various Sharp PDAs
3  *
4  * Copyright (c) 2004 Richard Purdie
5  *
6  *      Based on code written by Sharp/Lineo for 2.4 kernels
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  *
12  */
13
14 #include <linux/device.h>
15 #include <asm/io.h>
16 #include <asm/hardware/scoop.h>
17
18 #define SCOOP_REG(d,adr) (*(volatile unsigned short*)(d +(adr)))
19
20 /* PCMCIA to Scoop linkage structures for pxa2xx_sharpsl.c
21    There is no easy way to link multiple scoop devices into one
22    single entity for the pxa2xx_pcmcia device */
23 int scoop_num;
24 struct scoop_pcmcia_dev *scoop_devs;
25
26 struct  scoop_dev {
27         void  *base;
28         spinlock_t scoop_lock;
29         u32 scoop_gpwr;
30 };
31
32 void reset_scoop(struct device *dev)
33 {
34         struct scoop_dev *sdev = dev_get_drvdata(dev);
35
36         SCOOP_REG(sdev->base,SCOOP_MCR) = 0x0100;  // 00
37         SCOOP_REG(sdev->base,SCOOP_CDR) = 0x0000;  // 04
38         SCOOP_REG(sdev->base,SCOOP_CPR) = 0x0000;  // 0C
39         SCOOP_REG(sdev->base,SCOOP_CCR) = 0x0000;  // 10
40         SCOOP_REG(sdev->base,SCOOP_IMR) = 0x0000;  // 18
41         SCOOP_REG(sdev->base,SCOOP_IRM) = 0x00FF;  // 14
42         SCOOP_REG(sdev->base,SCOOP_ISR) = 0x0000;  // 1C
43         SCOOP_REG(sdev->base,SCOOP_IRM) = 0x0000;
44 }
45
46 unsigned short set_scoop_gpio(struct device *dev, unsigned short bit)
47 {
48         unsigned short gpio_bit;
49         unsigned long flag;
50         struct scoop_dev *sdev = dev_get_drvdata(dev);
51
52         spin_lock_irqsave(&sdev->scoop_lock, flag);
53         gpio_bit = SCOOP_REG(sdev->base, SCOOP_GPWR) | bit;
54         SCOOP_REG(sdev->base, SCOOP_GPWR) = gpio_bit;
55         spin_unlock_irqrestore(&sdev->scoop_lock, flag);
56
57         return gpio_bit;
58 }
59
60 unsigned short reset_scoop_gpio(struct device *dev, unsigned short bit)
61 {
62         unsigned short gpio_bit;
63         unsigned long flag;
64         struct scoop_dev *sdev = dev_get_drvdata(dev);
65
66         spin_lock_irqsave(&sdev->scoop_lock, flag);
67         gpio_bit = SCOOP_REG(sdev->base, SCOOP_GPWR) & ~bit;
68         SCOOP_REG(sdev->base,SCOOP_GPWR) = gpio_bit;
69         spin_unlock_irqrestore(&sdev->scoop_lock, flag);
70
71         return gpio_bit;
72 }
73
74 EXPORT_SYMBOL(set_scoop_gpio);
75 EXPORT_SYMBOL(reset_scoop_gpio);
76
77 unsigned short read_scoop_reg(struct device *dev, unsigned short reg)
78 {
79         struct scoop_dev *sdev = dev_get_drvdata(dev);
80         return SCOOP_REG(sdev->base,reg);
81 }
82
83 void write_scoop_reg(struct device *dev, unsigned short reg, unsigned short data)
84 {
85         struct scoop_dev *sdev = dev_get_drvdata(dev);
86         SCOOP_REG(sdev->base,reg)=data;
87 }
88
89 EXPORT_SYMBOL(reset_scoop);
90 EXPORT_SYMBOL(read_scoop_reg);
91 EXPORT_SYMBOL(write_scoop_reg);
92
93 #ifdef CONFIG_PM
94 static int scoop_suspend(struct device *dev, pm_message_t state, uint32_t level)
95 {
96         if (level == SUSPEND_POWER_DOWN) {
97                 struct scoop_dev *sdev = dev_get_drvdata(dev);
98
99                 sdev->scoop_gpwr = SCOOP_REG(sdev->base,SCOOP_GPWR);
100                 SCOOP_REG(sdev->base,SCOOP_GPWR) = 0;
101         }
102         return 0;
103 }
104
105 static int scoop_resume(struct device *dev, uint32_t level)
106 {
107         if (level == RESUME_POWER_ON) {
108                 struct scoop_dev *sdev = dev_get_drvdata(dev);
109
110                 SCOOP_REG(sdev->base,SCOOP_GPWR) = sdev->scoop_gpwr;
111         }
112         return 0;
113 }
114 #else
115 #define scoop_suspend   NULL
116 #define scoop_resume    NULL
117 #endif
118
119 int __init scoop_probe(struct device *dev)
120 {
121         struct scoop_dev *devptr;
122         struct scoop_config *inf;
123         struct platform_device *pdev = to_platform_device(dev);
124         struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
125
126         if (!mem)
127                 return -EINVAL;
128
129         devptr = kmalloc(sizeof(struct scoop_dev), GFP_KERNEL);
130
131         if (!devptr)
132                 return  -ENOMEM;
133
134         memset(devptr, 0, sizeof(struct scoop_dev));
135         spin_lock_init(&devptr->scoop_lock);
136
137         inf = dev->platform_data;
138         devptr->base = ioremap(mem->start, mem->end - mem->start + 1);
139
140         if (!devptr->base) {
141                 kfree(devptr);
142                 return -ENOMEM;
143         }
144
145         dev_set_drvdata(dev, devptr);
146
147         printk("Sharp Scoop Device found at 0x%08x -> 0x%08x\n",(unsigned int)mem->start,(unsigned int)devptr->base);
148
149         SCOOP_REG(devptr->base, SCOOP_MCR) = 0x0140;
150         reset_scoop(dev);
151         SCOOP_REG(devptr->base, SCOOP_GPCR) = inf->io_dir & 0xffff;
152         SCOOP_REG(devptr->base, SCOOP_GPWR) = inf->io_out & 0xffff;
153
154         return 0;
155 }
156
157 static int scoop_remove(struct device *dev)
158 {
159         struct scoop_dev *sdev = dev_get_drvdata(dev);
160         if (sdev) {
161                 iounmap(sdev->base);
162                 kfree(sdev);
163                 dev_set_drvdata(dev, NULL);
164         }
165         return 0;
166 }
167
168 static struct device_driver scoop_driver = {
169         .name           = "sharp-scoop",
170         .bus            = &platform_bus_type,
171         .probe          = scoop_probe,
172         .remove         = scoop_remove,
173         .suspend        = scoop_suspend,
174         .resume         = scoop_resume,
175 };
176
177 int __init scoop_init(void)
178 {
179         return driver_register(&scoop_driver);
180 }
181
182 subsys_initcall(scoop_init);