69 static void i2c_reset(struct mv_i2c *base)  in i2c_reset()  argument
74 	icr_mode = readl(&base->icr) & ICR_MODE_MASK;  in i2c_reset()
75 	writel(readl(&base->icr) & ~ICR_IUE, &base->icr); /* disable unit */  in i2c_reset()
76 	writel(readl(&base->icr) | ICR_UR, &base->icr);	  /* reset the unit */  in i2c_reset()
78 	writel(readl(&base->icr) & ~ICR_IUE, &base->icr); /* disable unit */  in i2c_reset()
82 	writel(CONFIG_SYS_I2C_SLAVE, &base->isar); /* set our slave address */  in i2c_reset()
84 	writel(I2C_ICR_INIT | icr_mode, &base->icr);  in i2c_reset()
85 	writel(I2C_ISR_INIT, &base->isr); /* set clear interrupt bits */  in i2c_reset()
86 	writel(readl(&base->icr) | ICR_IUE, &base->icr); /* enable unit */  in i2c_reset()
96 static int i2c_isr_set_cleared(struct mv_i2c *base, unsigned long set_mask,  in i2c_isr_set_cleared()  argument
102 		isr = readl(&base->isr);  in i2c_isr_set_cleared()
126 static int i2c_transfer(struct mv_i2c *base, struct mv_i2c_msg *msg)  in i2c_transfer()  argument
136 		if (!i2c_isr_set_cleared(base, 0, ISR_IBB))  in i2c_transfer()
140 		writel(readl(&base->icr) & ~ICR_START, &base->icr);  in i2c_transfer()
141 		writel(readl(&base->icr) & ~ICR_STOP, &base->icr);  in i2c_transfer()
142 		writel(msg->data, &base->idbr);  in i2c_transfer()
144 			writel(readl(&base->icr) | ICR_START, &base->icr);  in i2c_transfer()
146 			writel(readl(&base->icr) | ICR_STOP, &base->icr);  in i2c_transfer()
148 			writel(readl(&base->icr) | ICR_ACKNAK, &base->icr);  in i2c_transfer()
150 			writel(readl(&base->icr) & ~ICR_ACKNAK, &base->icr);  in i2c_transfer()
151 		writel(readl(&base->icr) & ~ICR_ALDIE, &base->icr);  in i2c_transfer()
152 		writel(readl(&base->icr) | ICR_TB, &base->icr);  in i2c_transfer()
155 		if (!i2c_isr_set_cleared(base, ISR_ITE, 0))  in i2c_transfer()
159 		writel(readl(&base->isr) | ISR_ITE, &base->isr);  in i2c_transfer()
163 			if (!i2c_isr_set_cleared(base, 0, ISR_ACKNAK))  in i2c_transfer()
170 		if (!i2c_isr_set_cleared(base, 0, ISR_IBB))  in i2c_transfer()
174 		writel(readl(&base->icr) & ~ICR_START, &base->icr);  in i2c_transfer()
175 		writel(readl(&base->icr) & ~ICR_STOP, &base->icr);  in i2c_transfer()
177 			writel(readl(&base->icr) | ICR_START, &base->icr);  in i2c_transfer()
179 			writel(readl(&base->icr) | ICR_STOP, &base->icr);  in i2c_transfer()
181 			writel(readl(&base->icr) | ICR_ACKNAK, &base->icr);  in i2c_transfer()
183 			writel(readl(&base->icr) & ~ICR_ACKNAK, &base->icr);  in i2c_transfer()
184 		writel(readl(&base->icr) & ~ICR_ALDIE, &base->icr);  in i2c_transfer()
185 		writel(readl(&base->icr) | ICR_TB, &base->icr);  in i2c_transfer()
188 		if (!i2c_isr_set_cleared(base, ISR_IRF, 0))  in i2c_transfer()
191 		msg->data = readl(&base->idbr);  in i2c_transfer()
194 		writel(readl(&base->isr) | ISR_IRF, &base->isr);  in i2c_transfer()
233 	debug("i2c_transfer: ISR: 0x%04x\n", readl(&base->isr));  in i2c_transfer()
234 	i2c_reset(base);  in i2c_transfer()
238 static int __i2c_read(struct mv_i2c *base, uchar chip, u8 *addr, int alen,  in __i2c_read()  argument
251 	i2c_reset(base);  in __i2c_read()
260 	if (i2c_transfer(base, &msg))  in __i2c_read()
274 		if (i2c_transfer(base, &msg))  in __i2c_read()
285 	if (i2c_transfer(base, &msg))  in __i2c_read()
300 		if (i2c_transfer(base, &msg))  in __i2c_read()
309 	i2c_reset(base);  in __i2c_read()
314 static int __i2c_write(struct mv_i2c *base, uchar chip, u8 *addr, int alen,  in __i2c_write()  argument
322 	i2c_reset(base);  in __i2c_write()
331 	if (i2c_transfer(base, &msg))  in __i2c_write()
345 		if (i2c_transfer(base, &msg))  in __i2c_write()
363 		if (i2c_transfer(base, &msg))  in __i2c_write()
367 	i2c_reset(base);  in __i2c_write()
376 static void i2c_board_init(struct mv_i2c *base)  in i2c_board_init()  argument
388 	icr = readl(&base->icr);  in i2c_board_init()
389 	writel(readl(&base->icr) & ~(ICR_SCLE | ICR_IUE), &base->icr);  in i2c_board_init()
393 	writel(icr, &base->icr);  in i2c_board_init()
447 static int __i2c_probe_chip(struct mv_i2c *base, uchar chip)  in __i2c_probe_chip()  argument
451 	i2c_reset(base);  in __i2c_probe_chip()
457 	if (i2c_transfer(base, &msg))  in __i2c_probe_chip()
464 	if (i2c_transfer(base, &msg))  in __i2c_probe_chip()
534 	struct mv_i2c *base;  member
557 		return __i2c_read(i2c->base, dmsg->addr, omsg->buf,  in mv_i2c_xfer()
560 		return __i2c_write(i2c->base, dmsg->addr, omsg->buf,  in mv_i2c_xfer()
573 	clrsetbits_le32(&priv->base->icr, ICR_MODE_MASK, val);  in mv_i2c_set_bus_speed()
582 	priv->base = (void *)devfdt_get_addr_ptr(bus);  in mv_i2c_probe()