40 static void dw_i2c_enable(struct i2c_regs *i2c_base, bool enable)  in dw_i2c_enable()  argument
44 	writel(ena, &i2c_base->ic_enable);  in dw_i2c_enable()
47 static void dw_i2c_enable(struct i2c_regs *i2c_base, bool enable)  in dw_i2c_enable()  argument
53 		writel(ena, &i2c_base->ic_enable);  in dw_i2c_enable()
54 		if ((readl(&i2c_base->ic_enable_status) & IC_ENABLE_0B) == ena)  in dw_i2c_enable()
75 static unsigned int __dw_i2c_set_bus_speed(struct i2c_regs *i2c_base,  in __dw_i2c_set_bus_speed()  argument
91 	dw_i2c_enable(i2c_base, false);  in __dw_i2c_set_bus_speed()
93 	cntl = (readl(&i2c_base->ic_con) & (~IC_CON_SPD_MSK));  in __dw_i2c_set_bus_speed()
106 		writel(hcnt, &i2c_base->ic_hs_scl_hcnt);  in __dw_i2c_set_bus_speed()
107 		writel(lcnt, &i2c_base->ic_hs_scl_lcnt);  in __dw_i2c_set_bus_speed()
120 		writel(hcnt, &i2c_base->ic_ss_scl_hcnt);  in __dw_i2c_set_bus_speed()
121 		writel(lcnt, &i2c_base->ic_ss_scl_lcnt);  in __dw_i2c_set_bus_speed()
134 		writel(hcnt, &i2c_base->ic_fs_scl_hcnt);  in __dw_i2c_set_bus_speed()
135 		writel(lcnt, &i2c_base->ic_fs_scl_lcnt);  in __dw_i2c_set_bus_speed()
139 	writel(cntl, &i2c_base->ic_con);  in __dw_i2c_set_bus_speed()
143 		writel(scl_sda_cfg->sda_hold, &i2c_base->ic_sda_hold);  in __dw_i2c_set_bus_speed()
146 	dw_i2c_enable(i2c_base, true);  in __dw_i2c_set_bus_speed()
157 static void i2c_setaddress(struct i2c_regs *i2c_base, unsigned int i2c_addr)  in i2c_setaddress()  argument
160 	dw_i2c_enable(i2c_base, false);  in i2c_setaddress()
162 	writel(i2c_addr, &i2c_base->ic_tar);  in i2c_setaddress()
165 	dw_i2c_enable(i2c_base, true);  in i2c_setaddress()
173 static void i2c_flush_rxfifo(struct i2c_regs *i2c_base)  in i2c_flush_rxfifo()  argument
175 	while (readl(&i2c_base->ic_status) & IC_STATUS_RFNE)  in i2c_flush_rxfifo()
176 		readl(&i2c_base->ic_cmd_data);  in i2c_flush_rxfifo()
184 static int i2c_wait_for_bb(struct i2c_regs *i2c_base)  in i2c_wait_for_bb()  argument
188 	while ((readl(&i2c_base->ic_status) & IC_STATUS_MA) ||  in i2c_wait_for_bb()
189 	       !(readl(&i2c_base->ic_status) & IC_STATUS_TFE)) {  in i2c_wait_for_bb()
199 static int i2c_xfer_init(struct i2c_regs *i2c_base, uchar chip, uint addr,  in i2c_xfer_init()  argument
202 	if (i2c_wait_for_bb(i2c_base))  in i2c_xfer_init()
205 	i2c_setaddress(i2c_base, chip);  in i2c_xfer_init()
210 		       &i2c_base->ic_cmd_data);  in i2c_xfer_init()
215 static int i2c_xfer_finish(struct i2c_regs *i2c_base)  in i2c_xfer_finish()  argument
220 		if ((readl(&i2c_base->ic_raw_intr_stat) & IC_STOP_DET)) {  in i2c_xfer_finish()
221 			readl(&i2c_base->ic_clr_stop_det);  in i2c_xfer_finish()
228 	if (i2c_wait_for_bb(i2c_base)) {  in i2c_xfer_finish()
233 	i2c_flush_rxfifo(i2c_base);  in i2c_xfer_finish()
248 static int __dw_i2c_read(struct i2c_regs *i2c_base, u8 dev, uint addr,  in __dw_i2c_read()  argument
273 	if (i2c_xfer_init(i2c_base, dev, addr, alen))  in __dw_i2c_read()
287 				writel(IC_CMD | IC_STOP, &i2c_base->ic_cmd_data);  in __dw_i2c_read()
289 				writel(IC_CMD, &i2c_base->ic_cmd_data);  in __dw_i2c_read()
293 		if (readl(&i2c_base->ic_status) & IC_STATUS_RFNE) {  in __dw_i2c_read()
294 			*buffer++ = (uchar)readl(&i2c_base->ic_cmd_data);  in __dw_i2c_read()
303 	return i2c_xfer_finish(i2c_base);  in __dw_i2c_read()
316 static int __dw_i2c_write(struct i2c_regs *i2c_base, u8 dev, uint addr,  in __dw_i2c_write()  argument
341 	if (i2c_xfer_init(i2c_base, dev, addr, alen))  in __dw_i2c_write()
346 		if (readl(&i2c_base->ic_status) & IC_STATUS_TFNF) {  in __dw_i2c_write()
349 				       &i2c_base->ic_cmd_data);  in __dw_i2c_write()
351 				writel(*buffer, &i2c_base->ic_cmd_data);  in __dw_i2c_write()
362 	return i2c_xfer_finish(i2c_base);  in __dw_i2c_write()
372 static void __dw_i2c_init(struct i2c_regs *i2c_base, int speed, int slaveaddr)  in __dw_i2c_init()  argument
375 	dw_i2c_enable(i2c_base, false);  in __dw_i2c_init()
378 	       &i2c_base->ic_con);  in __dw_i2c_init()
379 	writel(IC_RX_TL, &i2c_base->ic_rx_tl);  in __dw_i2c_init()
380 	writel(IC_TX_TL, &i2c_base->ic_tx_tl);  in __dw_i2c_init()
381 	writel(IC_STOP_DET, &i2c_base->ic_intr_mask);  in __dw_i2c_init()
383 	__dw_i2c_set_bus_speed(i2c_base, NULL, speed);  in __dw_i2c_init()
384 	writel(slaveaddr, &i2c_base->ic_sar);  in __dw_i2c_init()
388 	dw_i2c_enable(i2c_base, true);  in __dw_i2c_init()
447 	struct i2c_regs *i2c_base = i2c_get_base(adap);  in dw_i2c_probe()  local
454 	ret = __dw_i2c_read(i2c_base, dev, 0, 1, (uchar *)&tmp, 1);  in dw_i2c_probe()
522 	struct i2c_regs *i2c_base = i2c->regs;
527 	ret = __dw_i2c_read(i2c_base, chip_addr, 0, 1, (uchar *)&tmp, 1);
529 		__dw_i2c_init(i2c_base, 0, 0);