41 static int  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()
50 static int dw_i2c_enable(struct i2c_regs *i2c_base, bool enable)  in dw_i2c_enable()  argument
56 		writel(ena, &i2c_base->ic_enable);  in dw_i2c_enable()
57 		if ((readl(&i2c_base->ic_enable_status) & IC_ENABLE_0B) == ena)  in dw_i2c_enable()
79 static unsigned int __dw_i2c_set_bus_speed(struct i2c_regs *i2c_base,  in __dw_i2c_set_bus_speed()  argument
95 	dw_i2c_enable(i2c_base, false);  in __dw_i2c_set_bus_speed()
97 	cntl = (readl(&i2c_base->ic_con) & (~IC_CON_SPD_MSK));  in __dw_i2c_set_bus_speed()
110 		writel(hcnt, &i2c_base->ic_hs_scl_hcnt);  in __dw_i2c_set_bus_speed()
111 		writel(lcnt, &i2c_base->ic_hs_scl_lcnt);  in __dw_i2c_set_bus_speed()
124 		writel(hcnt, &i2c_base->ic_ss_scl_hcnt);  in __dw_i2c_set_bus_speed()
125 		writel(lcnt, &i2c_base->ic_ss_scl_lcnt);  in __dw_i2c_set_bus_speed()
138 		writel(hcnt, &i2c_base->ic_fs_scl_hcnt);  in __dw_i2c_set_bus_speed()
139 		writel(lcnt, &i2c_base->ic_fs_scl_lcnt);  in __dw_i2c_set_bus_speed()
143 	writel(cntl, &i2c_base->ic_con);  in __dw_i2c_set_bus_speed()
147 		writel(scl_sda_cfg->sda_hold, &i2c_base->ic_sda_hold);  in __dw_i2c_set_bus_speed()
150 	dw_i2c_enable(i2c_base, true);  in __dw_i2c_set_bus_speed()
161 static void i2c_setaddress(struct i2c_regs *i2c_base, unsigned int i2c_addr)  in i2c_setaddress()  argument
164 	dw_i2c_enable(i2c_base, false);  in i2c_setaddress()
166 	writel(i2c_addr, &i2c_base->ic_tar);  in i2c_setaddress()
169 	dw_i2c_enable(i2c_base, true);  in i2c_setaddress()
177 static void i2c_flush_rxfifo(struct i2c_regs *i2c_base)  in i2c_flush_rxfifo()  argument
179 	while (readl(&i2c_base->ic_status) & IC_STATUS_RFNE)  in i2c_flush_rxfifo()
180 		readl(&i2c_base->ic_cmd_data);  in i2c_flush_rxfifo()
188 static int i2c_wait_for_bb(struct i2c_regs *i2c_base)  in i2c_wait_for_bb()  argument
192 	while ((readl(&i2c_base->ic_status) & IC_STATUS_MA) ||  in i2c_wait_for_bb()
193 	       !(readl(&i2c_base->ic_status) & IC_STATUS_TFE)) {  in i2c_wait_for_bb()
203 static int i2c_xfer_init(struct i2c_regs *i2c_base, uchar chip, uint addr,  in i2c_xfer_init()  argument
206 	if (i2c_wait_for_bb(i2c_base))  in i2c_xfer_init()
209 	i2c_setaddress(i2c_base, chip);  in i2c_xfer_init()
214 		       &i2c_base->ic_cmd_data);  in i2c_xfer_init()
219 static int i2c_xfer_finish(struct i2c_regs *i2c_base)  in i2c_xfer_finish()  argument
224 		if ((readl(&i2c_base->ic_raw_intr_stat) & IC_STOP_DET)) {  in i2c_xfer_finish()
225 			readl(&i2c_base->ic_clr_stop_det);  in i2c_xfer_finish()
232 	if (i2c_wait_for_bb(i2c_base)) {  in i2c_xfer_finish()
237 	i2c_flush_rxfifo(i2c_base);  in i2c_xfer_finish()
252 static int __dw_i2c_read(struct i2c_regs *i2c_base, u8 dev, uint addr,  in __dw_i2c_read()  argument
277 	if (i2c_xfer_init(i2c_base, dev, addr, alen))  in __dw_i2c_read()
291 				writel(IC_CMD | IC_STOP, &i2c_base->ic_cmd_data);  in __dw_i2c_read()
293 				writel(IC_CMD, &i2c_base->ic_cmd_data);  in __dw_i2c_read()
297 		if (readl(&i2c_base->ic_status) & IC_STATUS_RFNE) {  in __dw_i2c_read()
298 			*buffer++ = (uchar)readl(&i2c_base->ic_cmd_data);  in __dw_i2c_read()
307 	return i2c_xfer_finish(i2c_base);  in __dw_i2c_read()
320 static int __dw_i2c_write(struct i2c_regs *i2c_base, u8 dev, uint addr,  in __dw_i2c_write()  argument
345 	if (i2c_xfer_init(i2c_base, dev, addr, alen))  in __dw_i2c_write()
350 		if (readl(&i2c_base->ic_status) & IC_STATUS_TFNF) {  in __dw_i2c_write()
353 				       &i2c_base->ic_cmd_data);  in __dw_i2c_write()
355 				writel(*buffer, &i2c_base->ic_cmd_data);  in __dw_i2c_write()
366 	return i2c_xfer_finish(i2c_base);  in __dw_i2c_write()
376 static int __dw_i2c_init(struct i2c_regs *i2c_base, int speed, int slaveaddr)  in __dw_i2c_init()  argument
381 	ret = dw_i2c_enable(i2c_base, false);  in __dw_i2c_init()
386 	       &i2c_base->ic_con);  in __dw_i2c_init()
387 	writel(IC_RX_TL, &i2c_base->ic_rx_tl);  in __dw_i2c_init()
388 	writel(IC_TX_TL, &i2c_base->ic_tx_tl);  in __dw_i2c_init()
389 	writel(IC_STOP_DET, &i2c_base->ic_intr_mask);  in __dw_i2c_init()
391 	__dw_i2c_set_bus_speed(i2c_base, NULL, speed);  in __dw_i2c_init()
392 	writel(slaveaddr, &i2c_base->ic_sar);  in __dw_i2c_init()
396 	ret = dw_i2c_enable(i2c_base, true);  in __dw_i2c_init()
459 	struct i2c_regs *i2c_base = i2c_get_base(adap);  in dw_i2c_probe()  local
466 	ret = __dw_i2c_read(i2c_base, dev, 0, 1, (uchar *)&tmp, 1);  in dw_i2c_probe()
534 	struct i2c_regs *i2c_base = i2c->regs;
539 	ret = __dw_i2c_read(i2c_base, chip_addr, 0, 1, (uchar *)&tmp, 1);
541 		__dw_i2c_init(i2c_base, 0, 0);