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29#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30
31#include <linux/module.h>
32#include <linux/init.h>
33#include <linux/delay.h>
34#include <linux/device.h>
35#include <linux/slab.h>
36#include <asm/io.h>
37
38#include "bttvp.h"
39
40
41
42
43static int bttv_sub_bus_match(struct device *dev, struct device_driver *drv)
44{
45 struct bttv_sub_driver *sub = to_bttv_sub_drv(drv);
46 int len = strlen(sub->wanted);
47
48 if (0 == strncmp(dev_name(dev), sub->wanted, len))
49 return 1;
50 return 0;
51}
52
53static int bttv_sub_probe(struct device *dev)
54{
55 struct bttv_sub_device *sdev = to_bttv_sub_dev(dev);
56 struct bttv_sub_driver *sub = to_bttv_sub_drv(dev->driver);
57
58 return sub->probe ? sub->probe(sdev) : -ENODEV;
59}
60
61static int bttv_sub_remove(struct device *dev)
62{
63 struct bttv_sub_device *sdev = to_bttv_sub_dev(dev);
64 struct bttv_sub_driver *sub = to_bttv_sub_drv(dev->driver);
65
66 if (sub->remove)
67 sub->remove(sdev);
68 return 0;
69}
70
71struct bus_type bttv_sub_bus_type = {
72 .name = "bttv-sub",
73 .match = &bttv_sub_bus_match,
74 .probe = bttv_sub_probe,
75 .remove = bttv_sub_remove,
76};
77
78static void release_sub_device(struct device *dev)
79{
80 struct bttv_sub_device *sub = to_bttv_sub_dev(dev);
81 kfree(sub);
82}
83
84int bttv_sub_add_device(struct bttv_core *core, char *name)
85{
86 struct bttv_sub_device *sub;
87 int err;
88
89 sub = kzalloc(sizeof(*sub),GFP_KERNEL);
90 if (NULL == sub)
91 return -ENOMEM;
92
93 sub->core = core;
94 sub->dev.parent = &core->pci->dev;
95 sub->dev.bus = &bttv_sub_bus_type;
96 sub->dev.release = release_sub_device;
97 dev_set_name(&sub->dev, "%s%d", name, core->nr);
98
99 err = device_register(&sub->dev);
100 if (0 != err) {
101 kfree(sub);
102 return err;
103 }
104 pr_info("%d: add subdevice \"%s\"\n", core->nr, dev_name(&sub->dev));
105 list_add_tail(&sub->list,&core->subs);
106 return 0;
107}
108
109int bttv_sub_del_devices(struct bttv_core *core)
110{
111 struct bttv_sub_device *sub, *save;
112
113 list_for_each_entry_safe(sub, save, &core->subs, list) {
114 list_del(&sub->list);
115 device_unregister(&sub->dev);
116 }
117 return 0;
118}
119
120
121
122
123int bttv_sub_register(struct bttv_sub_driver *sub, char *wanted)
124{
125 sub->drv.bus = &bttv_sub_bus_type;
126 snprintf(sub->wanted,sizeof(sub->wanted),"%s",wanted);
127 return driver_register(&sub->drv);
128}
129EXPORT_SYMBOL(bttv_sub_register);
130
131int bttv_sub_unregister(struct bttv_sub_driver *sub)
132{
133 driver_unregister(&sub->drv);
134 return 0;
135}
136EXPORT_SYMBOL(bttv_sub_unregister);
137
138
139
140
141void bttv_gpio_inout(struct bttv_core *core, u32 mask, u32 outbits)
142{
143 struct bttv *btv = container_of(core, struct bttv, c);
144 unsigned long flags;
145 u32 data;
146
147 spin_lock_irqsave(&btv->gpio_lock,flags);
148 data = btread(BT848_GPIO_OUT_EN);
149 data = data & ~mask;
150 data = data | (mask & outbits);
151 btwrite(data,BT848_GPIO_OUT_EN);
152 spin_unlock_irqrestore(&btv->gpio_lock,flags);
153}
154
155u32 bttv_gpio_read(struct bttv_core *core)
156{
157 struct bttv *btv = container_of(core, struct bttv, c);
158 u32 value;
159
160 value = btread(BT848_GPIO_DATA);
161 return value;
162}
163
164void bttv_gpio_write(struct bttv_core *core, u32 value)
165{
166 struct bttv *btv = container_of(core, struct bttv, c);
167
168 btwrite(value,BT848_GPIO_DATA);
169}
170
171void bttv_gpio_bits(struct bttv_core *core, u32 mask, u32 bits)
172{
173 struct bttv *btv = container_of(core, struct bttv, c);
174 unsigned long flags;
175 u32 data;
176
177 spin_lock_irqsave(&btv->gpio_lock,flags);
178 data = btread(BT848_GPIO_DATA);
179 data = data & ~mask;
180 data = data | (mask & bits);
181 btwrite(data,BT848_GPIO_DATA);
182 spin_unlock_irqrestore(&btv->gpio_lock,flags);
183}
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