81 static void spi_sh_write(struct spi_sh_data *ss, unsigned long data,  in spi_sh_write()  argument
84 	if (ss->width == 8)  in spi_sh_write()
85 		iowrite8(data, ss->addr + (offset >> 2));  in spi_sh_write()
86 	else if (ss->width == 32)  in spi_sh_write()
87 		iowrite32(data, ss->addr + offset);  in spi_sh_write()
90 static unsigned long spi_sh_read(struct spi_sh_data *ss, unsigned long offset)  in spi_sh_read()  argument
92 	if (ss->width == 8)  in spi_sh_read()
93 		return ioread8(ss->addr + (offset >> 2));  in spi_sh_read()
94 	else if (ss->width == 32)  in spi_sh_read()
95 		return ioread32(ss->addr + offset);  in spi_sh_read()
100 static void spi_sh_set_bit(struct spi_sh_data *ss, unsigned long val,  in spi_sh_set_bit()  argument
105 	tmp = spi_sh_read(ss, offset);  in spi_sh_set_bit()
107 	spi_sh_write(ss, tmp, offset);  in spi_sh_set_bit()
110 static void spi_sh_clear_bit(struct spi_sh_data *ss, unsigned long val,  in spi_sh_clear_bit()  argument
115 	tmp = spi_sh_read(ss, offset);  in spi_sh_clear_bit()
117 	spi_sh_write(ss, tmp, offset);  in spi_sh_clear_bit()
120 static void clear_fifo(struct spi_sh_data *ss)  in clear_fifo()  argument
122 	spi_sh_set_bit(ss, SPI_SH_RSTF, SPI_SH_CR2);  in clear_fifo()
123 	spi_sh_clear_bit(ss, SPI_SH_RSTF, SPI_SH_CR2);  in clear_fifo()
126 static int spi_sh_wait_receive_buffer(struct spi_sh_data *ss)  in spi_sh_wait_receive_buffer()  argument
130 	while (spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_RBE) {  in spi_sh_wait_receive_buffer()
138 static int spi_sh_wait_write_buffer_empty(struct spi_sh_data *ss)  in spi_sh_wait_write_buffer_empty()  argument
142 	while (!(spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_TBE)) {  in spi_sh_wait_write_buffer_empty()
150 static int spi_sh_send(struct spi_sh_data *ss, struct spi_message *mesg,  in spi_sh_send()  argument
160 		spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1);  in spi_sh_send()
166 				!(spi_sh_read(ss, SPI_SH_CR4) &  in spi_sh_send()
168 				!(spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_TBF);  in spi_sh_send()
170 			spi_sh_write(ss, (unsigned long)data[i], SPI_SH_TBR);  in spi_sh_send()
172 		if (spi_sh_read(ss, SPI_SH_CR4) & SPI_SH_WPABRT) {  in spi_sh_send()
174 			spi_sh_set_bit(ss, SPI_SH_WPABRT, SPI_SH_CR4);  in spi_sh_send()
185 			ss->cr1 &= ~SPI_SH_TBE;  in spi_sh_send()
186 			spi_sh_set_bit(ss, SPI_SH_TBE, SPI_SH_CR4);  in spi_sh_send()
187 			ret = wait_event_interruptible_timeout(ss->wait,  in spi_sh_send()
188 						 ss->cr1 & SPI_SH_TBE,  in spi_sh_send()
190 			if (ret == 0 && !(ss->cr1 & SPI_SH_TBE)) {  in spi_sh_send()
198 		spi_sh_clear_bit(ss, SPI_SH_SSD | SPI_SH_SSDB, SPI_SH_CR1);  in spi_sh_send()
199 		spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1);  in spi_sh_send()
201 		ss->cr1 &= ~SPI_SH_TBE;  in spi_sh_send()
202 		spi_sh_set_bit(ss, SPI_SH_TBE, SPI_SH_CR4);  in spi_sh_send()
203 		ret = wait_event_interruptible_timeout(ss->wait,  in spi_sh_send()
204 					 ss->cr1 & SPI_SH_TBE,  in spi_sh_send()
206 		if (ret == 0 && (ss->cr1 & SPI_SH_TBE)) {  in spi_sh_send()
215 static int spi_sh_receive(struct spi_sh_data *ss, struct spi_message *mesg,  in spi_sh_receive()  argument
225 		spi_sh_write(ss, SPI_SH_MAX_BYTE, SPI_SH_CR3);  in spi_sh_receive()
227 		spi_sh_write(ss, t->len, SPI_SH_CR3);  in spi_sh_receive()
229 	spi_sh_clear_bit(ss, SPI_SH_SSD | SPI_SH_SSDB, SPI_SH_CR1);  in spi_sh_receive()
230 	spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1);  in spi_sh_receive()
232 	spi_sh_wait_write_buffer_empty(ss);  in spi_sh_receive()
237 			ss->cr1 &= ~SPI_SH_RBF;  in spi_sh_receive()
238 			spi_sh_set_bit(ss, SPI_SH_RBF, SPI_SH_CR4);  in spi_sh_receive()
239 			ret = wait_event_interruptible_timeout(ss->wait,  in spi_sh_receive()
240 						 ss->cr1 & SPI_SH_RBF,  in spi_sh_receive()
243 			    spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_RBE) {  in spi_sh_receive()
251 			if (spi_sh_wait_receive_buffer(ss))  in spi_sh_receive()
253 			data[i] = (unsigned char)spi_sh_read(ss, SPI_SH_RBR);  in spi_sh_receive()
262 		clear_fifo(ss);  in spi_sh_receive()
263 		spi_sh_write(ss, 1, SPI_SH_CR3);  in spi_sh_receive()
265 		spi_sh_write(ss, 0, SPI_SH_CR3);  in spi_sh_receive()
274 	struct spi_sh_data *ss = spi_controller_get_devdata(ctlr);  in spi_sh_transfer_one_message()  local
280 	spi_sh_clear_bit(ss, SPI_SH_SSA, SPI_SH_CR1);  in spi_sh_transfer_one_message()
289 			ret = spi_sh_send(ss, mesg, t);  in spi_sh_transfer_one_message()
294 			ret = spi_sh_receive(ss, mesg, t);  in spi_sh_transfer_one_message()
304 	clear_fifo(ss);  in spi_sh_transfer_one_message()
305 	spi_sh_set_bit(ss, SPI_SH_SSD, SPI_SH_CR1);  in spi_sh_transfer_one_message()
308 	spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD,  in spi_sh_transfer_one_message()
311 	clear_fifo(ss);  in spi_sh_transfer_one_message()
321 	spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD,  in spi_sh_transfer_one_message()
323 	clear_fifo(ss);  in spi_sh_transfer_one_message()
330 	struct spi_sh_data *ss = spi_controller_get_devdata(spi->controller);  in spi_sh_setup()  local
334 	spi_sh_write(ss, 0xfe, SPI_SH_CR1);	/* SPI sycle stop */  in spi_sh_setup()
335 	spi_sh_write(ss, 0x00, SPI_SH_CR1);	/* CR1 init */  in spi_sh_setup()
336 	spi_sh_write(ss, 0x00, SPI_SH_CR3);	/* CR3 init */  in spi_sh_setup()
338 	clear_fifo(ss);  in spi_sh_setup()
341 	spi_sh_write(ss, spi_sh_read(ss, SPI_SH_CR2) | 0x07, SPI_SH_CR2);  in spi_sh_setup()
349 	struct spi_sh_data *ss = spi_controller_get_devdata(spi->controller);  in spi_sh_cleanup()  local
353 	spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD,  in spi_sh_cleanup()
359 	struct spi_sh_data *ss = (struct spi_sh_data *)_ss;  in spi_sh_irq()  local
362 	cr1 = spi_sh_read(ss, SPI_SH_CR1);  in spi_sh_irq()
364 		ss->cr1 |= SPI_SH_TBE;  in spi_sh_irq()
366 		ss->cr1 |= SPI_SH_TBF;  in spi_sh_irq()
368 		ss->cr1 |= SPI_SH_RBE;  in spi_sh_irq()
370 		ss->cr1 |= SPI_SH_RBF;  in spi_sh_irq()
372 	if (ss->cr1) {  in spi_sh_irq()
373 		spi_sh_clear_bit(ss, ss->cr1, SPI_SH_CR4);  in spi_sh_irq()
374 		wake_up(&ss->wait);  in spi_sh_irq()
382 	struct spi_sh_data *ss = platform_get_drvdata(pdev);  in spi_sh_remove()  local
384 	spi_unregister_controller(ss->host);  in spi_sh_remove()
385 	free_irq(ss->irq, ss);  in spi_sh_remove()
392 	struct spi_sh_data *ss;  in spi_sh_probe()  local
412 	ss = spi_controller_get_devdata(host);  in spi_sh_probe()
413 	platform_set_drvdata(pdev, ss);  in spi_sh_probe()
417 		ss->width = 8;  in spi_sh_probe()
420 		ss->width = 32;  in spi_sh_probe()
426 	ss->irq = irq;  in spi_sh_probe()
427 	ss->host = host;  in spi_sh_probe()
428 	ss->addr = devm_ioremap(&pdev->dev, res->start, resource_size(res));  in spi_sh_probe()
429 	if (ss->addr == NULL) {  in spi_sh_probe()
433 	init_waitqueue_head(&ss->wait);  in spi_sh_probe()
435 	ret = request_irq(irq, spi_sh_irq, 0, "spi_sh", ss);  in spi_sh_probe()
456 	free_irq(irq, ss);  in spi_sh_probe()