pci/ddbridge/ddbridge-i2c.c

3  * ddbridge-i2c.c: Digital Devices bridge i2c driver
20 #include <linux/i2c.h>
25 #include "ddbridge-i2c.h"
31 static int ddb_i2c_cmd(struct ddb_i2c *i2c, u32 adr, u32 cmd)
33 	struct ddb *dev = i2c->dev;
37 	ddbwritel(dev, (adr << 9) | cmd, i2c->regs + I2C_COMMAND);
38 	stat = wait_for_completion_timeout(&i2c->completion, HZ);
39 	val = ddbreadl(dev, i2c->regs + I2C_COMMAND);
42 			dev->nr, i2c->nr, i2c->link);
47 			if (i2c->link) {
49 					DDB_LINK_TAG(i2c->link) |
53 					i2c->link, listat);
59 					i2c->regs + I2C_MONITOR);
78 	struct ddb_i2c *i2c = (struct ddb_i2c *)i2c_get_adapdata(adapter);
79 	struct ddb *dev = i2c->dev;
83 	if (msg[0].len > i2c->bsize)
89 				  i2c->regs + I2C_TASKLENGTH);
90 			if (ddb_i2c_cmd(i2c, addr, 3))
93 				   i2c->rbuf, msg[0].len);
96 		ddbcpyto(dev, i2c->wbuf, msg[0].buf, msg[0].len);
97 		ddbwritel(dev, msg[0].len, i2c->regs + I2C_TASKLENGTH);
98 		if (ddb_i2c_cmd(i2c, addr, 2))
106 		if (msg[1].len > i2c->bsize)
108 		ddbcpyto(dev, i2c->wbuf, msg[0].buf, msg[0].len);
110 			  i2c->regs + I2C_TASKLENGTH);
111 		if (ddb_i2c_cmd(i2c, addr, 1))
114 			   i2c->rbuf,
136 	struct ddb_i2c *i2c;
139 		i2c = &dev->i2c[i];
140 		i2c_del_adapter(&i2c->adap);
146 	struct ddb_i2c *i2c = (struct ddb_i2c *)priv;
148 	complete(&i2c->completion);
151 static int ddb_i2c_add(struct ddb *dev, struct ddb_i2c *i2c,
157 	i2c->nr = i;
158 	i2c->dev = dev;
159 	i2c->link = link;
160 	i2c->bsize = regmap->i2c_buf->size;
161 	i2c->wbuf = DDB_LINK_TAG(link) |
162 		(regmap->i2c_buf->base + i2c->bsize * i);
163 	i2c->rbuf = i2c->wbuf; /* + i2c->bsize / 2 */
164 	i2c->regs = DDB_LINK_TAG(link) |
165 		(regmap->i2c->base + regmap->i2c->size * i);
166 	ddbwritel(dev, I2C_SPEED_100, i2c->regs + I2C_TIMING);
167 	ddbwritel(dev, ((i2c->rbuf & 0xffff) << 16) | (i2c->wbuf & 0xffff),
168 		  i2c->regs + I2C_TASKADDRESS);
169 	init_completion(&i2c->completion);
171 	adap = &i2c->adap;
172 	i2c_set_adapdata(adap, i2c);
181 		 dev->nr, i2c->link, i);
183 	adap->algo_data = (void *)i2c;
192 	struct ddb_i2c *i2c;
200 		if (!regmap || !regmap->i2c)
203 		for (i = 0; i < regmap->i2c->num; i++) {
206 			i2c = &dev->i2c[num];
207 			ddb_irq_set(dev, l, i + base, i2c_handler, i2c);
208 			stat = ddb_i2c_add(dev, i2c, regmap, l, i, num);
216 			i2c = &dev->i2c[j];
217 			adap = &i2c->adap;