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30#include <linux/module.h>
31#include <linux/init.h>
32
33#include <asm/io.h>
34
35#include "cx88.h"
36#include <media/v4l2-common.h>
37
38static unsigned int i2c_debug;
39module_param(i2c_debug, int, 0644);
40MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
41
42static unsigned int i2c_scan;
43module_param(i2c_scan, int, 0444);
44MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
45
46static unsigned int i2c_udelay = 5;
47module_param(i2c_udelay, int, 0644);
48MODULE_PARM_DESC(i2c_udelay,"i2c delay at insmod time, in usecs "
49 "(should be 5 or higher). Lower value means higher bus speed.");
50
51#define dprintk(level,fmt, arg...) if (i2c_debug >= level) \
52 printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
53
54
55
56static void cx8800_bit_setscl(void *data, int state)
57{
58 struct cx88_core *core = data;
59
60 if (state)
61 core->i2c_state |= 0x02;
62 else
63 core->i2c_state &= ~0x02;
64 cx_write(MO_I2C, core->i2c_state);
65 cx_read(MO_I2C);
66}
67
68static void cx8800_bit_setsda(void *data, int state)
69{
70 struct cx88_core *core = data;
71
72 if (state)
73 core->i2c_state |= 0x01;
74 else
75 core->i2c_state &= ~0x01;
76 cx_write(MO_I2C, core->i2c_state);
77 cx_read(MO_I2C);
78}
79
80static int cx8800_bit_getscl(void *data)
81{
82 struct cx88_core *core = data;
83 u32 state;
84
85 state = cx_read(MO_I2C);
86 return state & 0x02 ? 1 : 0;
87}
88
89static int cx8800_bit_getsda(void *data)
90{
91 struct cx88_core *core = data;
92 u32 state;
93
94 state = cx_read(MO_I2C);
95 return state & 0x01;
96}
97
98
99
100static const struct i2c_algo_bit_data cx8800_i2c_algo_template = {
101 .setsda = cx8800_bit_setsda,
102 .setscl = cx8800_bit_setscl,
103 .getsda = cx8800_bit_getsda,
104 .getscl = cx8800_bit_getscl,
105 .udelay = 16,
106 .timeout = 200,
107};
108
109
110
111static const char * const i2c_devs[128] = {
112 [ 0x1c >> 1 ] = "lgdt330x",
113 [ 0x86 >> 1 ] = "tda9887/cx22702",
114 [ 0xa0 >> 1 ] = "eeprom",
115 [ 0xc0 >> 1 ] = "tuner (analog)",
116 [ 0xc2 >> 1 ] = "tuner (analog/dvb)",
117 [ 0xc8 >> 1 ] = "xc5000",
118};
119
120static void do_i2c_scan(const char *name, struct i2c_client *c)
121{
122 unsigned char buf;
123 int i,rc;
124
125 for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
126 c->addr = i;
127 rc = i2c_master_recv(c,&buf,0);
128 if (rc < 0)
129 continue;
130 printk("%s: i2c scan: found device @ 0x%x [%s]\n",
131 name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
132 }
133}
134
135
136int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
137{
138
139 if (i2c_udelay<5)
140 i2c_udelay=5;
141
142 memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
143 sizeof(core->i2c_algo));
144
145
146 core->i2c_adap.dev.parent = &pci->dev;
147 strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
148 core->i2c_adap.owner = THIS_MODULE;
149 core->i2c_algo.udelay = i2c_udelay;
150 core->i2c_algo.data = core;
151 i2c_set_adapdata(&core->i2c_adap, &core->v4l2_dev);
152 core->i2c_adap.algo_data = &core->i2c_algo;
153 core->i2c_client.adapter = &core->i2c_adap;
154 strlcpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE);
155
156 cx8800_bit_setscl(core,1);
157 cx8800_bit_setsda(core,1);
158
159 core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
160 if (0 == core->i2c_rc) {
161 static u8 tuner_data[] =
162 { 0x0b, 0xdc, 0x86, 0x52 };
163 static struct i2c_msg tuner_msg =
164 { .flags = 0, .addr = 0xc2 >> 1, .buf = tuner_data, .len = 4 };
165
166 dprintk(1, "i2c register ok\n");
167 switch( core->boardnr ) {
168 case CX88_BOARD_HAUPPAUGE_HVR1300:
169 case CX88_BOARD_HAUPPAUGE_HVR3000:
170 case CX88_BOARD_HAUPPAUGE_HVR4000:
171 printk("%s: i2c init: enabling analog demod on HVR1300/3000/4000 tuner\n",
172 core->name);
173 i2c_transfer(core->i2c_client.adapter, &tuner_msg, 1);
174 break;
175 default:
176 break;
177 }
178 if (i2c_scan)
179 do_i2c_scan(core->name,&core->i2c_client);
180 } else
181 printk("%s: i2c register FAILED\n", core->name);
182
183 return core->i2c_rc;
184}
185
