50 	struct i2c_adapter adap;  member
64 static int wait_xfer_done(struct i2c_au1550_data *adap)  in wait_xfer_done()  argument
69 	for (i = 0; i < adap->xfer_timeout; i++) {  in wait_xfer_done()
70 		if (RD(adap, PSC_SMBSTAT) & PSC_SMBSTAT_TE)  in wait_xfer_done()
79 static int wait_ack(struct i2c_au1550_data *adap)  in wait_ack()  argument
83 	if (wait_xfer_done(adap))  in wait_ack()
86 	stat = RD(adap, PSC_SMBEVNT);  in wait_ack()
93 static int wait_master_done(struct i2c_au1550_data *adap)  in wait_master_done()  argument
98 	for (i = 0; i < 2 * adap->xfer_timeout; i++) {  in wait_master_done()
99 		if ((RD(adap, PSC_SMBEVNT) & PSC_SMBEVNT_MD) != 0)  in wait_master_done()
108 do_address(struct i2c_au1550_data *adap, unsigned int addr, int rd, int q)  in do_address()  argument
113 	stat = RD(adap, PSC_SMBSTAT);  in do_address()
114 	WR(adap, PSC_SMBEVNT, PSC_SMBEVNT_ALLCLR);  in do_address()
117 		WR(adap, PSC_SMBPCR, PSC_SMBPCR_DC);  in do_address()
118 		while ((RD(adap, PSC_SMBPCR) & PSC_SMBPCR_DC) != 0)  in do_address()
133 	WR(adap, PSC_SMBTXRX, addr);  in do_address()
134 	WR(adap, PSC_SMBPCR, PSC_SMBPCR_MS);  in do_address()
135 	if (wait_ack(adap))  in do_address()
137 	return (q) ? wait_master_done(adap) : 0;  in do_address()
140 static int wait_for_rx_byte(struct i2c_au1550_data *adap, unsigned char *out)  in wait_for_rx_byte()  argument
144 	if (wait_xfer_done(adap))  in wait_for_rx_byte()
147 	j =  adap->xfer_timeout * 100;  in wait_for_rx_byte()
153 		if ((RD(adap, PSC_SMBSTAT) & PSC_SMBSTAT_RE) == 0)  in wait_for_rx_byte()
159 	*out = RD(adap, PSC_SMBTXRX);  in wait_for_rx_byte()
164 static int i2c_read(struct i2c_au1550_data *adap, unsigned char *buf,  in i2c_read()  argument
178 		WR(adap, PSC_SMBTXRX, 0);  in i2c_read()
179 		if (wait_for_rx_byte(adap, &buf[i]))  in i2c_read()
186 	WR(adap, PSC_SMBTXRX, PSC_SMBTXRX_STP);  in i2c_read()
187 	if (wait_master_done(adap))  in i2c_read()
190 	buf[i] = (unsigned char)(RD(adap, PSC_SMBTXRX) & 0xff);  in i2c_read()
194 static int i2c_write(struct i2c_au1550_data *adap, unsigned char *buf,  in i2c_write()  argument
206 		WR(adap, PSC_SMBTXRX, data);  in i2c_write()
207 		if (wait_ack(adap))  in i2c_write()
215 	WR(adap, PSC_SMBTXRX, data);  in i2c_write()
216 	if (wait_master_done(adap))  in i2c_write()
224 	struct i2c_au1550_data *adap = i2c_adap->algo_data;  in au1550_xfer()  local
228 	WR(adap, PSC_CTRL, PSC_CTRL_ENABLE);  in au1550_xfer()
232 		err = do_address(adap, p->addr, p->flags & I2C_M_RD,  in au1550_xfer()
237 			err = i2c_read(adap, p->buf, p->len);  in au1550_xfer()
239 			err = i2c_write(adap, p->buf, p->len);  in au1550_xfer()
247 	WR(adap, PSC_CTRL, PSC_CTRL_SUSPEND);  in au1550_xfer()
252 static u32 au1550_func(struct i2c_adapter *adap)  in au1550_func()  argument
329 	priv->adap.nr = pdev->id;  in i2c_au1550_probe()
330 	priv->adap.algo = &au1550_algo;  in i2c_au1550_probe()
331 	priv->adap.algo_data = priv;  in i2c_au1550_probe()
332 	priv->adap.dev.parent = &pdev->dev;  in i2c_au1550_probe()
333 	strlcpy(priv->adap.name, "Au1xxx PSC I2C", sizeof(priv->adap.name));  in i2c_au1550_probe()
338 	ret = i2c_add_numbered_adapter(&priv->adap);  in i2c_au1550_probe()
352 	i2c_del_adapter(&priv->adap);  in i2c_au1550_remove()