41 static void dw_i2c_enable(struct i2c_regs *i2c_base, bool enable)  in dw_i2c_enable()  argument
45 	writel(ena, &i2c_base->ic_enable);  in dw_i2c_enable()
48 static void dw_i2c_enable(struct i2c_regs *i2c_base, bool enable)  in dw_i2c_enable()  argument
54 		writel(ena, &i2c_base->ic_enable);  in dw_i2c_enable()
55 		if ((readl(&i2c_base->ic_enable_status) & IC_ENABLE_0B) == ena)  in dw_i2c_enable()
76 static unsigned int __dw_i2c_set_bus_speed(struct i2c_regs *i2c_base,  in __dw_i2c_set_bus_speed()  argument
92 	dw_i2c_enable(i2c_base, false);  in __dw_i2c_set_bus_speed()
94 	cntl = (readl(&i2c_base->ic_con) & (~IC_CON_SPD_MSK));  in __dw_i2c_set_bus_speed()
107 		writel(hcnt, &i2c_base->ic_hs_scl_hcnt);  in __dw_i2c_set_bus_speed()
108 		writel(lcnt, &i2c_base->ic_hs_scl_lcnt);  in __dw_i2c_set_bus_speed()
121 		writel(hcnt, &i2c_base->ic_ss_scl_hcnt);  in __dw_i2c_set_bus_speed()
122 		writel(lcnt, &i2c_base->ic_ss_scl_lcnt);  in __dw_i2c_set_bus_speed()
135 		writel(hcnt, &i2c_base->ic_fs_scl_hcnt);  in __dw_i2c_set_bus_speed()
136 		writel(lcnt, &i2c_base->ic_fs_scl_lcnt);  in __dw_i2c_set_bus_speed()
140 	writel(cntl, &i2c_base->ic_con);  in __dw_i2c_set_bus_speed()
144 		writel(scl_sda_cfg->sda_hold, &i2c_base->ic_sda_hold);  in __dw_i2c_set_bus_speed()
147 	dw_i2c_enable(i2c_base, true);  in __dw_i2c_set_bus_speed()
158 static void i2c_setaddress(struct i2c_regs *i2c_base, unsigned int i2c_addr)  in i2c_setaddress()  argument
161 	dw_i2c_enable(i2c_base, false);  in i2c_setaddress()
163 	writel(i2c_addr, &i2c_base->ic_tar);  in i2c_setaddress()
166 	dw_i2c_enable(i2c_base, true);  in i2c_setaddress()
174 static void i2c_flush_rxfifo(struct i2c_regs *i2c_base)  in i2c_flush_rxfifo()  argument
176 	while (readl(&i2c_base->ic_status) & IC_STATUS_RFNE)  in i2c_flush_rxfifo()
177 		readl(&i2c_base->ic_cmd_data);  in i2c_flush_rxfifo()
185 static int i2c_wait_for_bb(struct i2c_regs *i2c_base)  in i2c_wait_for_bb()  argument
189 	while ((readl(&i2c_base->ic_status) & IC_STATUS_MA) ||  in i2c_wait_for_bb()
190 	       !(readl(&i2c_base->ic_status) & IC_STATUS_TFE)) {  in i2c_wait_for_bb()
200 static int i2c_xfer_init(struct i2c_regs *i2c_base, uchar chip, uint addr,  in i2c_xfer_init()  argument
203 	if (i2c_wait_for_bb(i2c_base))  in i2c_xfer_init()
206 	i2c_setaddress(i2c_base, chip);  in i2c_xfer_init()
211 		       &i2c_base->ic_cmd_data);  in i2c_xfer_init()
216 static int i2c_xfer_finish(struct i2c_regs *i2c_base)  in i2c_xfer_finish()  argument
221 		if ((readl(&i2c_base->ic_raw_intr_stat) & IC_STOP_DET)) {  in i2c_xfer_finish()
222 			readl(&i2c_base->ic_clr_stop_det);  in i2c_xfer_finish()
229 	if (i2c_wait_for_bb(i2c_base)) {  in i2c_xfer_finish()
234 	i2c_flush_rxfifo(i2c_base);  in i2c_xfer_finish()
249 static int __dw_i2c_read(struct i2c_regs *i2c_base, u8 dev, uint addr,  in __dw_i2c_read()  argument
274 	if (i2c_xfer_init(i2c_base, dev, addr, alen))  in __dw_i2c_read()
288 				writel(IC_CMD | IC_STOP, &i2c_base->ic_cmd_data);  in __dw_i2c_read()
290 				writel(IC_CMD, &i2c_base->ic_cmd_data);  in __dw_i2c_read()
294 		if (readl(&i2c_base->ic_status) & IC_STATUS_RFNE) {  in __dw_i2c_read()
295 			*buffer++ = (uchar)readl(&i2c_base->ic_cmd_data);  in __dw_i2c_read()
304 	return i2c_xfer_finish(i2c_base);  in __dw_i2c_read()
317 static int __dw_i2c_write(struct i2c_regs *i2c_base, u8 dev, uint addr,  in __dw_i2c_write()  argument
342 	if (i2c_xfer_init(i2c_base, dev, addr, alen))  in __dw_i2c_write()
347 		if (readl(&i2c_base->ic_status) & IC_STATUS_TFNF) {  in __dw_i2c_write()
350 				       &i2c_base->ic_cmd_data);  in __dw_i2c_write()
352 				writel(*buffer, &i2c_base->ic_cmd_data);  in __dw_i2c_write()
363 	return i2c_xfer_finish(i2c_base);  in __dw_i2c_write()
373 static void __dw_i2c_init(struct i2c_regs *i2c_base, int speed, int slaveaddr)  in __dw_i2c_init()  argument
376 	dw_i2c_enable(i2c_base, false);  in __dw_i2c_init()
379 	       &i2c_base->ic_con);  in __dw_i2c_init()
380 	writel(IC_RX_TL, &i2c_base->ic_rx_tl);  in __dw_i2c_init()
381 	writel(IC_TX_TL, &i2c_base->ic_tx_tl);  in __dw_i2c_init()
382 	writel(IC_STOP_DET, &i2c_base->ic_intr_mask);  in __dw_i2c_init()
384 	__dw_i2c_set_bus_speed(i2c_base, NULL, speed);  in __dw_i2c_init()
385 	writel(slaveaddr, &i2c_base->ic_sar);  in __dw_i2c_init()
389 	dw_i2c_enable(i2c_base, true);  in __dw_i2c_init()
448 	struct i2c_regs *i2c_base = i2c_get_base(adap);  in dw_i2c_probe()  local
455 	ret = __dw_i2c_read(i2c_base, dev, 0, 1, (uchar *)&tmp, 1);  in dw_i2c_probe()
523 	struct i2c_regs *i2c_base = i2c->regs;
528 	ret = __dw_i2c_read(i2c_base, chip_addr, 0, 1, (uchar *)&tmp, 1);
530 		__dw_i2c_init(i2c_base, 0, 0);