29 static struct sh_i2c *base;  variable
68 static void sh_i2c_send_stop(struct sh_i2c *base)  in sh_i2c_send_stop()  argument
70 	clrbits_8(&base->iccr2, SH_I2C_ICCR2_BBSY | SH_I2C_ICCR2_SCP);  in sh_i2c_send_stop()
73 static int check_icsr_bits(struct sh_i2c *base, u8 bits)  in check_icsr_bits()  argument
78 		if (bits & readb(&base->icsr))  in check_icsr_bits()
86 static int check_stop(struct sh_i2c *base)  in check_stop()  argument
88 	int ret = check_icsr_bits(base, SH_I2C_ICSR_STOP);  in check_stop()
89 	clrbits_8(&base->icsr, SH_I2C_ICSR_STOP);  in check_stop()
94 static int check_tend(struct sh_i2c *base, int stop)  in check_tend()  argument
96 	int ret = check_icsr_bits(base, SH_I2C_ICSR_TEND);  in check_tend()
99 		clrbits_8(&base->icsr, SH_I2C_ICSR_STOP);  in check_tend()
100 		sh_i2c_send_stop(base);  in check_tend()
103 	clrbits_8(&base->icsr, SH_I2C_ICSR_TEND);  in check_tend()
107 static int check_tdre(struct sh_i2c *base)  in check_tdre()  argument
109 	return check_icsr_bits(base, SH_I2C_ICSR_TDRE);  in check_tdre()
112 static int check_rdrf(struct sh_i2c *base)  in check_rdrf()  argument
114 	return check_icsr_bits(base, SH_I2C_ICSR_RDRF);  in check_rdrf()
117 static int check_bbsy(struct sh_i2c *base)  in check_bbsy()  argument
122 		if (!(SH_I2C_ICCR2_BBSY & readb(&base->iccr2)))  in check_bbsy()
129 static int check_ackbr(struct sh_i2c *base)  in check_ackbr()  argument
134 		if (!(SH_I2C_ICIER_ACKBR & readb(&base->icier)))  in check_ackbr()
142 static void sh_i2c_reset(struct sh_i2c *base)  in sh_i2c_reset()  argument
144 	setbits_8(&base->iccr2, SH_I2C_ICCR2_IICRST);  in sh_i2c_reset()
148 	clrbits_8(&base->iccr2, SH_I2C_ICCR2_IICRST);  in sh_i2c_reset()
151 static int i2c_set_addr(struct sh_i2c *base, u8 id, u8 reg)  in i2c_set_addr()  argument
153 	if (check_bbsy(base)) {  in i2c_set_addr()
158 	setbits_8(&base->iccr1, SH_I2C_ICCR1_MTRS);  in i2c_set_addr()
159 	clrsetbits_8(&base->iccr2, SH_I2C_ICCR2_SCP, SH_I2C_ICCR2_BBSY);  in i2c_set_addr()
161 	writeb((id << 1), &base->icdrt);  in i2c_set_addr()
163 	if (check_tend(base, 0)) {  in i2c_set_addr()
168 	if (check_ackbr(base)) {  in i2c_set_addr()
169 		check_tend(base, 0);  in i2c_set_addr()
170 		sh_i2c_send_stop(base);  in i2c_set_addr()
174 	writeb(reg, &base->icdrt);  in i2c_set_addr()
176 	if (check_tdre(base)) {  in i2c_set_addr()
181 	if (check_tend(base, 0)) {  in i2c_set_addr()
193 i2c_raw_write(struct sh_i2c *base, u8 id, u8 reg, u8 *val, int size)  in i2c_raw_write()  argument
197 	if (i2c_set_addr(base, id, reg)) {  in i2c_raw_write()
203 		writeb(val[i], &base->icdrt);  in i2c_raw_write()
204 		check_tdre(base);  in i2c_raw_write()
207 	check_tend(base, 1);  in i2c_raw_write()
208 	check_stop(base);  in i2c_raw_write()
212 	clrbits_8(&base->iccr1, SH_I2C_ICCR1_MTRS);  in i2c_raw_write()
213 	clrbits_8(&base->icsr, SH_I2C_ICSR_TDRE);  in i2c_raw_write()
214 	sh_i2c_reset(base);  in i2c_raw_write()
219 static u8 i2c_raw_read(struct sh_i2c *base, u8 id, u8 reg)  in i2c_raw_read()  argument
223 	if (i2c_set_addr(base, id, reg)) {  in i2c_raw_read()
228 	clrsetbits_8(&base->iccr2, SH_I2C_ICCR2_SCP, SH_I2C_ICCR2_BBSY);  in i2c_raw_read()
229 	writeb((id << 1) | 1, &base->icdrt);  in i2c_raw_read()
231 	if (check_tend(base, 0))  in i2c_raw_read()
234 	clrsetbits_8(&base->iccr1, SH_I2C_ICCR1_TRS, SH_I2C_ICCR1_MST);  in i2c_raw_read()
235 	clrbits_8(&base->icsr, SH_I2C_ICSR_TDRE);  in i2c_raw_read()
236 	setbits_8(&base->icier, SH_I2C_ICIER_ACKBT);  in i2c_raw_read()
237 	setbits_8(&base->iccr1, SH_I2C_ICCR1_RCVD);  in i2c_raw_read()
240 	ret = readb(&base->icdrr);  in i2c_raw_read()
242 	if (check_rdrf(base)) {  in i2c_raw_read()
247 	clrbits_8(&base->icsr, SH_I2C_ICSR_STOP);  in i2c_raw_read()
250 	sh_i2c_send_stop(base);  in i2c_raw_read()
252 	if (check_stop(base)) {  in i2c_raw_read()
257 	clrbits_8(&base->iccr1, SH_I2C_ICCR1_MTRS);  in i2c_raw_read()
258 	clrbits_8(&base->icsr, SH_I2C_ICSR_TDRE);  in i2c_raw_read()
261 	ret = readb(&base->icdrr);  in i2c_raw_read()
264 	clrbits_8(&base->iccr1, SH_I2C_ICCR1_RCVD);  in i2c_raw_read()
281 		base = (void *)CONFIG_SH_I2C_BASE0;  in i2c_set_bus_num()
284 		base = (void *)CONFIG_SH_I2C_BASE1;  in i2c_set_bus_num()
310 	base = (struct sh_i2c *)CONFIG_SH_I2C_BASE0;  in i2c_init()
320 	sh_i2c_reset(base);  in i2c_init()
323 	writeb(SH_I2C_ICCR1_ICE | iccr1_cks, &base->iccr1);  in i2c_init()
324 	writeb(nf2cyc, &base->nf2cyc);  in i2c_init()
344 		buffer[i] = i2c_raw_read(base, chip, addr + i);  in i2c_read()
364 	return i2c_raw_write(base, chip, addr, buffer, len);  in i2c_write()