68 static void i2c_reset(struct mv_i2c *base)  in i2c_reset()  argument
73 	icr_mode = readl(&base->icr) & ICR_MODE_MASK;  in i2c_reset()
74 	writel(readl(&base->icr) & ~ICR_IUE, &base->icr); /* disable unit */  in i2c_reset()
75 	writel(readl(&base->icr) | ICR_UR, &base->icr);	  /* reset the unit */  in i2c_reset()
77 	writel(readl(&base->icr) & ~ICR_IUE, &base->icr); /* disable unit */  in i2c_reset()
81 	writel(CONFIG_SYS_I2C_SLAVE, &base->isar); /* set our slave address */  in i2c_reset()
83 	writel(I2C_ICR_INIT | icr_mode, &base->icr);  in i2c_reset()
84 	writel(I2C_ISR_INIT, &base->isr); /* set clear interrupt bits */  in i2c_reset()
85 	writel(readl(&base->icr) | ICR_IUE, &base->icr); /* enable unit */  in i2c_reset()
95 static int i2c_isr_set_cleared(struct mv_i2c *base, unsigned long set_mask,  in i2c_isr_set_cleared()  argument
101 		isr = readl(&base->isr);  in i2c_isr_set_cleared()
125 static int i2c_transfer(struct mv_i2c *base, struct mv_i2c_msg *msg)  in i2c_transfer()  argument
135 		if (!i2c_isr_set_cleared(base, 0, ISR_IBB))  in i2c_transfer()
139 		writel(readl(&base->icr) & ~ICR_START, &base->icr);  in i2c_transfer()
140 		writel(readl(&base->icr) & ~ICR_STOP, &base->icr);  in i2c_transfer()
141 		writel(msg->data, &base->idbr);  in i2c_transfer()
143 			writel(readl(&base->icr) | ICR_START, &base->icr);  in i2c_transfer()
145 			writel(readl(&base->icr) | ICR_STOP, &base->icr);  in i2c_transfer()
147 			writel(readl(&base->icr) | ICR_ACKNAK, &base->icr);  in i2c_transfer()
149 			writel(readl(&base->icr) & ~ICR_ACKNAK, &base->icr);  in i2c_transfer()
150 		writel(readl(&base->icr) & ~ICR_ALDIE, &base->icr);  in i2c_transfer()
151 		writel(readl(&base->icr) | ICR_TB, &base->icr);  in i2c_transfer()
154 		if (!i2c_isr_set_cleared(base, ISR_ITE, 0))  in i2c_transfer()
158 		writel(readl(&base->isr) | ISR_ITE, &base->isr);  in i2c_transfer()
162 			if (!i2c_isr_set_cleared(base, 0, ISR_ACKNAK))  in i2c_transfer()
169 		if (!i2c_isr_set_cleared(base, 0, ISR_IBB))  in i2c_transfer()
173 		writel(readl(&base->icr) & ~ICR_START, &base->icr);  in i2c_transfer()
174 		writel(readl(&base->icr) & ~ICR_STOP, &base->icr);  in i2c_transfer()
176 			writel(readl(&base->icr) | ICR_START, &base->icr);  in i2c_transfer()
178 			writel(readl(&base->icr) | ICR_STOP, &base->icr);  in i2c_transfer()
180 			writel(readl(&base->icr) | ICR_ACKNAK, &base->icr);  in i2c_transfer()
182 			writel(readl(&base->icr) & ~ICR_ACKNAK, &base->icr);  in i2c_transfer()
183 		writel(readl(&base->icr) & ~ICR_ALDIE, &base->icr);  in i2c_transfer()
184 		writel(readl(&base->icr) | ICR_TB, &base->icr);  in i2c_transfer()
187 		if (!i2c_isr_set_cleared(base, ISR_IRF, 0))  in i2c_transfer()
190 		msg->data = readl(&base->idbr);  in i2c_transfer()
193 		writel(readl(&base->isr) | ISR_IRF, &base->isr);  in i2c_transfer()
232 	debug("i2c_transfer: ISR: 0x%04x\n", readl(&base->isr));  in i2c_transfer()
233 	i2c_reset(base);  in i2c_transfer()
237 static int __i2c_read(struct mv_i2c *base, uchar chip, u8 *addr, int alen,  in __i2c_read()  argument
250 	i2c_reset(base);  in __i2c_read()
259 	if (i2c_transfer(base, &msg))  in __i2c_read()
273 		if (i2c_transfer(base, &msg))  in __i2c_read()
284 	if (i2c_transfer(base, &msg))  in __i2c_read()
299 		if (i2c_transfer(base, &msg))  in __i2c_read()
308 	i2c_reset(base);  in __i2c_read()
313 static int __i2c_write(struct mv_i2c *base, uchar chip, u8 *addr, int alen,  in __i2c_write()  argument
321 	i2c_reset(base);  in __i2c_write()
330 	if (i2c_transfer(base, &msg))  in __i2c_write()
344 		if (i2c_transfer(base, &msg))  in __i2c_write()
362 		if (i2c_transfer(base, &msg))  in __i2c_write()
366 	i2c_reset(base);  in __i2c_write()
375 static void i2c_board_init(struct mv_i2c *base)  in i2c_board_init()  argument
387 	icr = readl(&base->icr);  in i2c_board_init()
388 	writel(readl(&base->icr) & ~(ICR_SCLE | ICR_IUE), &base->icr);  in i2c_board_init()
392 	writel(icr, &base->icr);  in i2c_board_init()
446 static int __i2c_probe_chip(struct mv_i2c *base, uchar chip)  in __i2c_probe_chip()  argument
450 	i2c_reset(base);  in __i2c_probe_chip()
456 	if (i2c_transfer(base, &msg))  in __i2c_probe_chip()
463 	if (i2c_transfer(base, &msg))  in __i2c_probe_chip()
533 	struct mv_i2c *base;  member
556 		return __i2c_read(i2c->base, dmsg->addr, omsg->buf,  in mv_i2c_xfer()
559 		return __i2c_write(i2c->base, dmsg->addr, omsg->buf,  in mv_i2c_xfer()
572 	clrsetbits_le32(&priv->base->icr, ICR_MODE_MASK, val);  in mv_i2c_set_bus_speed()
581 	priv->base = (void *)devfdt_get_addr_ptr(bus);  in mv_i2c_probe()