12 #include <linux/spi/spi-mem.h>
104 static int spi_check_buswidth_req(struct spi_mem *mem, u8 buswidth, bool tx)  in spi_check_buswidth_req()  argument
106 	u32 mode = mem->spi->mode;  in spi_check_buswidth_req()
142 static bool spi_mem_check_buswidth(struct spi_mem *mem,  in spi_mem_check_buswidth()  argument
145 	if (spi_check_buswidth_req(mem, op->cmd.buswidth, true))  in spi_mem_check_buswidth()
149 	    spi_check_buswidth_req(mem, op->addr.buswidth, true))  in spi_mem_check_buswidth()
153 	    spi_check_buswidth_req(mem, op->dummy.buswidth, true))  in spi_mem_check_buswidth()
157 	    spi_check_buswidth_req(mem, op->data.buswidth,  in spi_mem_check_buswidth()
164 bool spi_mem_default_supports_op(struct spi_mem *mem,  in spi_mem_default_supports_op()  argument
167 	struct spi_controller *ctlr = mem->spi->controller;  in spi_mem_default_supports_op()
190 	if (op->max_freq && mem->spi->controller->min_speed_hz &&  in spi_mem_default_supports_op()
191 	    op->max_freq < mem->spi->controller->min_speed_hz)  in spi_mem_default_supports_op()
195 	    op->max_freq < mem->spi->max_speed_hz) {  in spi_mem_default_supports_op()
200 	return spi_mem_check_buswidth(mem, op);  in spi_mem_default_supports_op()
240 static bool spi_mem_internal_supports_op(struct spi_mem *mem,  in spi_mem_internal_supports_op()  argument
243 	struct spi_controller *ctlr = mem->spi->controller;  in spi_mem_internal_supports_op()
246 		return ctlr->mem_ops->supports_op(mem, op);  in spi_mem_internal_supports_op()
248 	return spi_mem_default_supports_op(mem, op);  in spi_mem_internal_supports_op()
254  * @mem: the SPI memory
266 bool spi_mem_supports_op(struct spi_mem *mem, const struct spi_mem_op *op)  in spi_mem_supports_op()  argument
271 	return spi_mem_internal_supports_op(mem, op);  in spi_mem_supports_op()
275 static int spi_mem_access_start(struct spi_mem *mem)  in spi_mem_access_start()  argument
277 	struct spi_controller *ctlr = mem->spi->controller;  in spi_mem_access_start()
302 static void spi_mem_access_end(struct spi_mem *mem)  in spi_mem_access_end()  argument
304 	struct spi_controller *ctlr = mem->spi->controller;  in spi_mem_access_end()
358  * @mem: the SPI memory
368 int spi_mem_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)  in spi_mem_exec_op()  argument
371 	struct spi_controller *ctlr = mem->spi->controller;  in spi_mem_exec_op()
378 	spi_mem_adjust_op_freq(mem, (struct spi_mem_op *)op);  in spi_mem_exec_op()
380 …dev_vdbg(&mem->spi->dev, "[cmd: 0x%02x][%dB addr: %#8llx][%2dB dummy][%4dB data %s] %d%c-%d%c-%d%c…  in spi_mem_exec_op()
389 		 op->max_freq ? op->max_freq : mem->spi->max_speed_hz);  in spi_mem_exec_op()
395 	if (!spi_mem_internal_supports_op(mem, op))  in spi_mem_exec_op()
398 	if (ctlr->mem_ops && ctlr->mem_ops->exec_op && !spi_get_csgpiod(mem->spi, 0)) {  in spi_mem_exec_op()
399 		ret = spi_mem_access_start(mem);  in spi_mem_exec_op()
403 		ret = ctlr->mem_ops->exec_op(mem, op);  in spi_mem_exec_op()
405 		spi_mem_access_end(mem);  in spi_mem_exec_op()
414 			spi_mem_add_op_stats(mem->spi->pcpu_statistics, op, ret);  in spi_mem_exec_op()
486 	ret = spi_sync(mem->spi, &msg);  in spi_mem_exec_op()
501  * spi_mem_get_name() - Return the SPI mem device name to be used by the
503  * @mem: the SPI memory
505  * This function allows SPI mem users to retrieve the SPI mem device name.
510  *	   by the SPI mem user
512 const char *spi_mem_get_name(struct spi_mem *mem)  in spi_mem_get_name()  argument
514 	return mem->name;  in spi_mem_get_name()
519  * spi_mem_adjust_op_size() - Adjust the data size of a SPI mem operation to
521  * @mem: the SPI memory
526  * optimized accesses. This function allows SPI mem drivers to split a single
533 int spi_mem_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op)  in spi_mem_adjust_op_size()  argument
535 	struct spi_controller *ctlr = mem->spi->controller;  in spi_mem_adjust_op_size()
539 		return ctlr->mem_ops->adjust_op_size(mem, op);  in spi_mem_adjust_op_size()
544 		if (len > spi_max_transfer_size(mem->spi))  in spi_mem_adjust_op_size()
548 				       spi_max_transfer_size(mem->spi),  in spi_mem_adjust_op_size()
549 				       spi_max_message_size(mem->spi) -  in spi_mem_adjust_op_size()
560  * spi_mem_adjust_op_freq() - Adjust the frequency of a SPI mem operation to
562  * @mem: the SPI memory
566  * speed. This function allows SPI mem drivers to set @op->max_freq to the
569 void spi_mem_adjust_op_freq(struct spi_mem *mem, struct spi_mem_op *op)  in spi_mem_adjust_op_freq()  argument
571 	if (!op->max_freq || op->max_freq > mem->spi->max_speed_hz)  in spi_mem_adjust_op_freq()
572 		op->max_freq = mem->spi->max_speed_hz;  in spi_mem_adjust_op_freq()
619 	ret = spi_mem_adjust_op_size(desc->mem, &op);  in spi_mem_no_dirmap_read()
623 	ret = spi_mem_exec_op(desc->mem, &op);  in spi_mem_no_dirmap_read()
639 	ret = spi_mem_adjust_op_size(desc->mem, &op);  in spi_mem_no_dirmap_write()
643 	ret = spi_mem_exec_op(desc->mem, &op);  in spi_mem_no_dirmap_write()
652  * @mem: SPI mem device this direct mapping should be created for
664 spi_mem_dirmap_create(struct spi_mem *mem,  in spi_mem_dirmap_create()  argument
667 	struct spi_controller *ctlr = mem->spi->controller;  in spi_mem_dirmap_create()
683 	desc->mem = mem;  in spi_mem_dirmap_create()
690 		if (!spi_mem_supports_op(desc->mem, &desc->info.op_tmpl))  in spi_mem_dirmap_create()
714 	struct spi_controller *ctlr = desc->mem->spi->controller;  in spi_mem_dirmap_destroy()
734  * @mem: SPI mem device this direct mapping should be created for
743 devm_spi_mem_dirmap_create(struct device *dev, struct spi_mem *mem,  in devm_spi_mem_dirmap_create()  argument
753 	desc = spi_mem_dirmap_create(mem, info);  in devm_spi_mem_dirmap_create()
811 	struct spi_controller *ctlr = desc->mem->spi->controller;  in spi_mem_dirmap_read()
823 		ret = spi_mem_access_start(desc->mem);  in spi_mem_dirmap_read()
829 		spi_mem_access_end(desc->mem);  in spi_mem_dirmap_read()
857 	struct spi_controller *ctlr = desc->mem->spi->controller;  in spi_mem_dirmap_write()
869 		ret = spi_mem_access_start(desc->mem);  in spi_mem_dirmap_write()
875 		spi_mem_access_end(desc->mem);  in spi_mem_dirmap_write()
889 static int spi_mem_read_status(struct spi_mem *mem,  in spi_mem_read_status()  argument
896 	ret = spi_mem_exec_op(mem, op);  in spi_mem_read_status()
910  * @mem: SPI memory device
924 int spi_mem_poll_status(struct spi_mem *mem,  in spi_mem_poll_status()  argument
931 	struct spi_controller *ctlr = mem->spi->controller;  in spi_mem_poll_status()
940 	if (ctlr->mem_ops && ctlr->mem_ops->poll_status && !spi_get_csgpiod(mem->spi, 0)) {  in spi_mem_poll_status()
941 		ret = spi_mem_access_start(mem);  in spi_mem_poll_status()
945 		ret = ctlr->mem_ops->poll_status(mem, op, mask, match,  in spi_mem_poll_status()
949 		spi_mem_access_end(mem);  in spi_mem_poll_status()
953 		if (!spi_mem_supports_op(mem, op))  in spi_mem_poll_status()
964 					polling_delay_us, timeout_ms * 1000, false, mem,  in spi_mem_poll_status()
978 	struct spi_mem *mem;  in spi_mem_probe()  local
980 	mem = devm_kzalloc(&spi->dev, sizeof(*mem), GFP_KERNEL);  in spi_mem_probe()
981 	if (!mem)  in spi_mem_probe()
984 	mem->spi = spi;  in spi_mem_probe()
987 		mem->name = ctlr->mem_ops->get_name(mem);  in spi_mem_probe()
989 		mem->name = dev_name(&spi->dev);  in spi_mem_probe()
991 	if (IS_ERR_OR_NULL(mem->name))  in spi_mem_probe()
992 		return PTR_ERR_OR_ZERO(mem->name);  in spi_mem_probe()
994 	spi_set_drvdata(spi, mem);  in spi_mem_probe()
996 	return memdrv->probe(mem);  in spi_mem_probe()
1002 	struct spi_mem *mem = spi_get_drvdata(spi);  in spi_mem_remove()  local
1005 		memdrv->remove(mem);  in spi_mem_remove()
1011 	struct spi_mem *mem = spi_get_drvdata(spi);  in spi_mem_shutdown()  local
1014 		memdrv->shutdown(mem);  in spi_mem_shutdown()