53 static void set_device_claimage(struct bbc_i2c_bus *bp, struct platform_device *op, int val)  in set_device_claimage()  argument
58 		if (bp->devs[i].device == op) {  in set_device_claimage()
59 			bp->devs[i].client_claimed = val;  in set_device_claimage()
68 struct platform_device *bbc_i2c_getdev(struct bbc_i2c_bus *bp, int index)  in bbc_i2c_getdev()  argument
74 		if (!(op = bp->devs[i].device))  in bbc_i2c_getdev()
88 struct bbc_i2c_client *bbc_i2c_attach(struct bbc_i2c_bus *bp, struct platform_device *op)  in bbc_i2c_attach()  argument
96 	client->bp = bp;  in bbc_i2c_attach()
108 	claim_device(bp, op);  in bbc_i2c_attach()
115 	struct bbc_i2c_bus *bp = client->bp;  in bbc_i2c_detach()  local
118 	release_device(bp, op);  in bbc_i2c_detach()
122 static int wait_for_pin(struct bbc_i2c_bus *bp, u8 *status)  in wait_for_pin()  argument
128 	bp->waiting = 1;  in wait_for_pin()
129 	add_wait_queue(&bp->wq, &wait);  in wait_for_pin()
134 				bp->wq,  in wait_for_pin()
135 				(((*status = readb(bp->i2c_control_regs + 0))  in wait_for_pin()
143 	remove_wait_queue(&bp->wq, &wait);  in wait_for_pin()
144 	bp->waiting = 0;  in wait_for_pin()
151 	struct bbc_i2c_bus *bp = client->bp;  in bbc_i2c_writeb()  local
156 	if (bp->i2c_bussel_reg != NULL)  in bbc_i2c_writeb()
157 		writeb(client->bus, bp->i2c_bussel_reg);  in bbc_i2c_writeb()
159 	writeb(address, bp->i2c_control_regs + 0x1);  in bbc_i2c_writeb()
160 	writeb(I2C_PCF_START, bp->i2c_control_regs + 0x0);  in bbc_i2c_writeb()
161 	if (wait_for_pin(bp, &status))  in bbc_i2c_writeb()
164 	writeb(off, bp->i2c_control_regs + 0x1);  in bbc_i2c_writeb()
165 	if (wait_for_pin(bp, &status) ||  in bbc_i2c_writeb()
169 	writeb(val, bp->i2c_control_regs + 0x1);  in bbc_i2c_writeb()
170 	if (wait_for_pin(bp, &status))  in bbc_i2c_writeb()
176 	writeb(I2C_PCF_STOP, bp->i2c_control_regs + 0x0);  in bbc_i2c_writeb()
182 	struct bbc_i2c_bus *bp = client->bp;  in bbc_i2c_readb()  local
186 	if (bp->i2c_bussel_reg != NULL)  in bbc_i2c_readb()
187 		writeb(client->bus, bp->i2c_bussel_reg);  in bbc_i2c_readb()
189 	writeb(address, bp->i2c_control_regs + 0x1);  in bbc_i2c_readb()
190 	writeb(I2C_PCF_START, bp->i2c_control_regs + 0x0);  in bbc_i2c_readb()
191 	if (wait_for_pin(bp, &status))  in bbc_i2c_readb()
194 	writeb(off, bp->i2c_control_regs + 0x1);  in bbc_i2c_readb()
195 	if (wait_for_pin(bp, &status) ||  in bbc_i2c_readb()
199 	writeb(I2C_PCF_STOP, bp->i2c_control_regs + 0x0);  in bbc_i2c_readb()
203 	writeb(address, bp->i2c_control_regs + 0x1);  in bbc_i2c_readb()
204 	writeb(I2C_PCF_START, bp->i2c_control_regs + 0x0);  in bbc_i2c_readb()
205 	if (wait_for_pin(bp, &status))  in bbc_i2c_readb()
211 	(void) readb(bp->i2c_control_regs + 0x1);  in bbc_i2c_readb()
212 	if (wait_for_pin(bp, &status))  in bbc_i2c_readb()
215 	writeb(I2C_PCF_ESO | I2C_PCF_ENI, bp->i2c_control_regs + 0x0);  in bbc_i2c_readb()
216 	*byte = readb(bp->i2c_control_regs + 0x1);  in bbc_i2c_readb()
217 	if (wait_for_pin(bp, &status))  in bbc_i2c_readb()
223 	writeb(I2C_PCF_STOP, bp->i2c_control_regs + 0x0);  in bbc_i2c_readb()
224 	(void) readb(bp->i2c_control_regs + 0x1);  in bbc_i2c_readb()
272 	struct bbc_i2c_bus *bp = dev_id;  in bbc_i2c_interrupt()  local
277 	if (bp->waiting &&  in bbc_i2c_interrupt()
278 	    !(readb(bp->i2c_control_regs + 0x0) & I2C_PCF_PIN))  in bbc_i2c_interrupt()
279 		wake_up_interruptible(&bp->wq);  in bbc_i2c_interrupt()
284 static void reset_one_i2c(struct bbc_i2c_bus *bp)  in reset_one_i2c()  argument
286 	writeb(I2C_PCF_PIN, bp->i2c_control_regs + 0x0);  in reset_one_i2c()
287 	writeb(bp->own, bp->i2c_control_regs + 0x1);  in reset_one_i2c()
288 	writeb(I2C_PCF_PIN | I2C_PCF_ES1, bp->i2c_control_regs + 0x0);  in reset_one_i2c()
289 	writeb(bp->clock, bp->i2c_control_regs + 0x1);  in reset_one_i2c()
290 	writeb(I2C_PCF_IDLE, bp->i2c_control_regs + 0x0);  in reset_one_i2c()
295 	struct bbc_i2c_bus *bp;  in attach_one_i2c()  local
299 	bp = kzalloc(sizeof(*bp), GFP_KERNEL);  in attach_one_i2c()
300 	if (!bp)  in attach_one_i2c()
303 	INIT_LIST_HEAD(&bp->temps);  in attach_one_i2c()
304 	INIT_LIST_HEAD(&bp->fans);  in attach_one_i2c()
306 	bp->i2c_control_regs = of_ioremap(&op->resource[0], 0, 0x2, "bbc_i2c_regs");  in attach_one_i2c()
307 	if (!bp->i2c_control_regs)  in attach_one_i2c()
311 		bp->i2c_bussel_reg = of_ioremap(&op->resource[1], 0, 0x1, "bbc_i2c_bussel");  in attach_one_i2c()
312 		if (!bp->i2c_bussel_reg)  in attach_one_i2c()
316 	bp->waiting = 0;  in attach_one_i2c()
317 	init_waitqueue_head(&bp->wq);  in attach_one_i2c()
319 			IRQF_SHARED, "bbc_i2c", bp))  in attach_one_i2c()
322 	bp->index = index;  in attach_one_i2c()
323 	bp->op = op;  in attach_one_i2c()
325 	spin_lock_init(&bp->lock);  in attach_one_i2c()
334 		bp->devs[entry].device = child_op;  in attach_one_i2c()
335 		bp->devs[entry].client_claimed = 0;  in attach_one_i2c()
338 	writeb(I2C_PCF_PIN, bp->i2c_control_regs + 0x0);  in attach_one_i2c()
339 	bp->own = readb(bp->i2c_control_regs + 0x01);  in attach_one_i2c()
340 	writeb(I2C_PCF_PIN | I2C_PCF_ES1, bp->i2c_control_regs + 0x0);  in attach_one_i2c()
341 	bp->clock = readb(bp->i2c_control_regs + 0x01);  in attach_one_i2c()
344 	       bp->index, bp->i2c_control_regs, entry, bp->own, bp->clock);  in attach_one_i2c()
346 	reset_one_i2c(bp);  in attach_one_i2c()
348 	return bp;  in attach_one_i2c()
351 	if (bp->i2c_bussel_reg)  in attach_one_i2c()
352 		of_iounmap(&op->resource[1], bp->i2c_bussel_reg, 1);  in attach_one_i2c()
353 	if (bp->i2c_control_regs)  in attach_one_i2c()
354 		of_iounmap(&op->resource[0], bp->i2c_control_regs, 2);  in attach_one_i2c()
355 	kfree(bp);  in attach_one_i2c()
359 extern int bbc_envctrl_init(struct bbc_i2c_bus *bp);
360 extern void bbc_envctrl_cleanup(struct bbc_i2c_bus *bp);
364 	struct bbc_i2c_bus *bp;  in bbc_i2c_probe()  local
367 	bp = attach_one_i2c(op, index);  in bbc_i2c_probe()
368 	if (!bp)  in bbc_i2c_probe()
371 	err = bbc_envctrl_init(bp);  in bbc_i2c_probe()
373 		free_irq(op->archdata.irqs[0], bp);  in bbc_i2c_probe()
374 		if (bp->i2c_bussel_reg)  in bbc_i2c_probe()
375 			of_iounmap(&op->resource[0], bp->i2c_bussel_reg, 1);  in bbc_i2c_probe()
376 		if (bp->i2c_control_regs)  in bbc_i2c_probe()
377 			of_iounmap(&op->resource[1], bp->i2c_control_regs, 2);  in bbc_i2c_probe()
378 		kfree(bp);  in bbc_i2c_probe()
380 		dev_set_drvdata(&op->dev, bp);  in bbc_i2c_probe()
388 	struct bbc_i2c_bus *bp = dev_get_drvdata(&op->dev);  in bbc_i2c_remove()  local
390 	bbc_envctrl_cleanup(bp);  in bbc_i2c_remove()
392 	free_irq(op->archdata.irqs[0], bp);  in bbc_i2c_remove()
394 	if (bp->i2c_bussel_reg)  in bbc_i2c_remove()
395 		of_iounmap(&op->resource[0], bp->i2c_bussel_reg, 1);  in bbc_i2c_remove()
396 	if (bp->i2c_control_regs)  in bbc_i2c_remove()
397 		of_iounmap(&op->resource[1], bp->i2c_control_regs, 2);  in bbc_i2c_remove()
399 	kfree(bp);  in bbc_i2c_remove()