107 static inline void riic_clear_set_bit(struct riic_dev *riic, u8 clear, u8 set, u8 reg)  in riic_clear_set_bit()  argument
109 	writeb((readb(riic->base + reg) & ~clear) | set, riic->base + reg);  in riic_clear_set_bit()
114 	struct riic_dev *riic = i2c_get_adapdata(adap);  in riic_xfer()  local
121 	if (readb(riic->base + RIIC_ICCR2) & ICCR2_BBSY) {  in riic_xfer()
122 		riic->err = -EBUSY;  in riic_xfer()
126 	reinit_completion(&riic->msg_done);  in riic_xfer()
127 	riic->err = 0;  in riic_xfer()
129 	writeb(0, riic->base + RIIC_ICSR2);  in riic_xfer()
132 		riic->bytes_left = RIIC_INIT_MSG;  in riic_xfer()
133 		riic->buf = msgs[i].buf;  in riic_xfer()
134 		riic->msg = &msgs[i];  in riic_xfer()
135 		riic->is_last = (i == num - 1);  in riic_xfer()
137 		writeb(ICIER_NAKIE | ICIER_TIE, riic->base + RIIC_ICIER);  in riic_xfer()
139 		writeb(start_bit, riic->base + RIIC_ICCR2);  in riic_xfer()
141 		time_left = wait_for_completion_timeout(&riic->msg_done, riic->adapter.timeout);  in riic_xfer()
143 			riic->err = -ETIMEDOUT;  in riic_xfer()
145 		if (riic->err)  in riic_xfer()
154 	return riic->err ?: num;  in riic_xfer()
159 	struct riic_dev *riic = data;  in riic_tdre_isr()  local
162 	if (!riic->bytes_left)  in riic_tdre_isr()
165 	if (riic->bytes_left == RIIC_INIT_MSG) {  in riic_tdre_isr()
166 		if (riic->msg->flags & I2C_M_RD)  in riic_tdre_isr()
168 			riic_clear_set_bit(riic, ICIER_TIE, ICIER_RIE, RIIC_ICIER);  in riic_tdre_isr()
171 			riic->bytes_left = riic->msg->len;  in riic_tdre_isr()
173 		val = i2c_8bit_addr_from_msg(riic->msg);  in riic_tdre_isr()
175 		val = *riic->buf;  in riic_tdre_isr()
176 		riic->buf++;  in riic_tdre_isr()
177 		riic->bytes_left--;  in riic_tdre_isr()
185 	if (riic->bytes_left == 0)  in riic_tdre_isr()
186 		riic_clear_set_bit(riic, ICIER_TIE, ICIER_TEIE, RIIC_ICIER);  in riic_tdre_isr()
193 	writeb(val, riic->base + RIIC_ICDRT);  in riic_tdre_isr()
200 	struct riic_dev *riic = data;  in riic_tend_isr()  local
202 	if (readb(riic->base + RIIC_ICSR2) & ICSR2_NACKF) {  in riic_tend_isr()
204 		readb(riic->base + RIIC_ICDRR);	/* dummy read */  in riic_tend_isr()
205 		riic_clear_set_bit(riic, ICSR2_NACKF, 0, RIIC_ICSR2);  in riic_tend_isr()
206 		riic->err = -ENXIO;  in riic_tend_isr()
207 	} else if (riic->bytes_left) {  in riic_tend_isr()
211 	if (riic->is_last || riic->err) {  in riic_tend_isr()
212 		riic_clear_set_bit(riic, ICIER_TEIE, ICIER_SPIE, RIIC_ICIER);  in riic_tend_isr()
213 		writeb(ICCR2_SP, riic->base + RIIC_ICCR2);  in riic_tend_isr()
216 		riic_clear_set_bit(riic, ICIER_TEIE, 0, RIIC_ICIER);  in riic_tend_isr()
217 		complete(&riic->msg_done);  in riic_tend_isr()
225 	struct riic_dev *riic = data;  in riic_rdrf_isr()  local
227 	if (!riic->bytes_left)  in riic_rdrf_isr()
230 	if (riic->bytes_left == RIIC_INIT_MSG) {  in riic_rdrf_isr()
231 		riic->bytes_left = riic->msg->len;  in riic_rdrf_isr()
232 		readb(riic->base + RIIC_ICDRR);	/* dummy read */  in riic_rdrf_isr()
236 	if (riic->bytes_left == 1) {  in riic_rdrf_isr()
238 		if (riic->is_last) {  in riic_rdrf_isr()
239 			riic_clear_set_bit(riic, 0, ICIER_SPIE, RIIC_ICIER);  in riic_rdrf_isr()
240 			writeb(ICCR2_SP, riic->base + RIIC_ICCR2);  in riic_rdrf_isr()
243 		riic_clear_set_bit(riic, 0, ICMR3_ACKBT, RIIC_ICMR3);  in riic_rdrf_isr()
246 		riic_clear_set_bit(riic, ICMR3_ACKBT, 0, RIIC_ICMR3);  in riic_rdrf_isr()
250 	*riic->buf = readb(riic->base + RIIC_ICDRR);  in riic_rdrf_isr()
251 	riic->buf++;  in riic_rdrf_isr()
252 	riic->bytes_left--;  in riic_rdrf_isr()
259 	struct riic_dev *riic = data;  in riic_stop_isr()  local
262 	writeb(0, riic->base + RIIC_ICSR2);  in riic_stop_isr()
263 	readb(riic->base + RIIC_ICSR2);  in riic_stop_isr()
264 	writeb(0, riic->base + RIIC_ICIER);  in riic_stop_isr()
265 	readb(riic->base + RIIC_ICIER);  in riic_stop_isr()
267 	complete(&riic->msg_done);  in riic_stop_isr()
282 static int riic_init_hw(struct riic_dev *riic, struct i2c_timings *t)  in riic_init_hw()  argument
288 	pm_runtime_get_sync(riic->adapter.dev.parent);  in riic_init_hw()
291 		dev_err(&riic->adapter.dev,  in riic_init_hw()
298 	rate = clk_get_rate(riic->clk);  in riic_init_hw()
331 		dev_err(&riic->adapter.dev, "invalid speed (%lu). Too slow.\n",  in riic_init_hw()
367 	writeb(ICCR1_IICRST | ICCR1_SOWP, riic->base + RIIC_ICCR1);  in riic_init_hw()
368 	riic_clear_set_bit(riic, 0, ICCR1_ICE, RIIC_ICCR1);  in riic_init_hw()
370 	writeb(ICMR1_CKS(cks), riic->base + RIIC_ICMR1);  in riic_init_hw()
371 	writeb(brh | ICBR_RESERVED, riic->base + RIIC_ICBRH);  in riic_init_hw()
372 	writeb(brl | ICBR_RESERVED, riic->base + RIIC_ICBRL);  in riic_init_hw()
374 	writeb(0, riic->base + RIIC_ICSER);  in riic_init_hw()
375 	writeb(ICMR3_ACKWP | ICMR3_RDRFS, riic->base + RIIC_ICMR3);  in riic_init_hw()
377 	riic_clear_set_bit(riic, ICCR1_IICRST, 0, RIIC_ICCR1);  in riic_init_hw()
380 	pm_runtime_put(riic->adapter.dev.parent);  in riic_init_hw()
394 	struct riic_dev *riic;  in riic_i2c_probe()  local
400 	riic = devm_kzalloc(&pdev->dev, sizeof(*riic), GFP_KERNEL);  in riic_i2c_probe()
401 	if (!riic)  in riic_i2c_probe()
405 	riic->base = devm_ioremap_resource(&pdev->dev, res);  in riic_i2c_probe()
406 	if (IS_ERR(riic->base))  in riic_i2c_probe()
407 		return PTR_ERR(riic->base);  in riic_i2c_probe()
409 	riic->clk = devm_clk_get(&pdev->dev, NULL);  in riic_i2c_probe()
410 	if (IS_ERR(riic->clk)) {  in riic_i2c_probe()
412 		return PTR_ERR(riic->clk);  in riic_i2c_probe()
421 					0, riic_irqs[i].name, riic);  in riic_i2c_probe()
428 	adap = &riic->adapter;  in riic_i2c_probe()
429 	i2c_set_adapdata(adap, riic);  in riic_i2c_probe()
436 	init_completion(&riic->msg_done);  in riic_i2c_probe()
442 	ret = riic_init_hw(riic, &i2c_t);  in riic_i2c_probe()
450 	platform_set_drvdata(pdev, riic);  in riic_i2c_probe()
463 	struct riic_dev *riic = platform_get_drvdata(pdev);  in riic_i2c_remove()  local
466 	writeb(0, riic->base + RIIC_ICIER);  in riic_i2c_remove()
468 	i2c_del_adapter(&riic->adapter);  in riic_i2c_remove()