1 // SPDX-License-Identifier: GPL-2.0
3 // RPC-IF SPI/QSPI/Octa driver
7 // Copyright (C) 2019 - 2020 Cogent Embedded, Inc.
13 #include <linux/spi/spi-mem.h>
15 #include <memory/renesas-rpc-if.h>
23 	struct rpcif *rpc = spi_controller_get_devdata(spi_dev->controller);  in rpcif_spi_mem_prepare()  local
26 	rpc_op.cmd.opcode = spi_op->cmd.opcode;  in rpcif_spi_mem_prepare()
27 	rpc_op.cmd.buswidth = spi_op->cmd.buswidth;  in rpcif_spi_mem_prepare()
29 	if (spi_op->addr.nbytes) {  in rpcif_spi_mem_prepare()
30 		rpc_op.addr.buswidth = spi_op->addr.buswidth;  in rpcif_spi_mem_prepare()
31 		rpc_op.addr.nbytes = spi_op->addr.nbytes;  in rpcif_spi_mem_prepare()
32 		rpc_op.addr.val = spi_op->addr.val;  in rpcif_spi_mem_prepare()
35 	if (spi_op->dummy.nbytes) {  in rpcif_spi_mem_prepare()
36 		rpc_op.dummy.buswidth = spi_op->dummy.buswidth;  in rpcif_spi_mem_prepare()
37 		rpc_op.dummy.ncycles  = spi_op->dummy.nbytes * 8 /  in rpcif_spi_mem_prepare()
38 					spi_op->dummy.buswidth;  in rpcif_spi_mem_prepare()
41 	if (spi_op->data.nbytes || (offs && len)) {  in rpcif_spi_mem_prepare()
42 		rpc_op.data.buswidth = spi_op->data.buswidth;  in rpcif_spi_mem_prepare()
43 		rpc_op.data.nbytes = spi_op->data.nbytes;  in rpcif_spi_mem_prepare()
44 		switch (spi_op->data.dir) {  in rpcif_spi_mem_prepare()
47 			rpc_op.data.buf.in = spi_op->data.buf.in;  in rpcif_spi_mem_prepare()
51 			rpc_op.data.buf.out = spi_op->data.buf.out;  in rpcif_spi_mem_prepare()
61 	rpcif_prepare(rpc->dev, &rpc_op, offs, len);  in rpcif_spi_mem_prepare()
67 	if (!spi_mem_default_supports_op(mem, op))  in rpcif_spi_mem_supports_op()
70 	if (op->data.buswidth > 4 || op->addr.buswidth > 4 ||  in rpcif_spi_mem_supports_op()
71 	    op->dummy.buswidth > 4 || op->cmd.buswidth > 4 ||  in rpcif_spi_mem_supports_op()
72 	    op->addr.nbytes > 4)  in rpcif_spi_mem_supports_op()
81 	struct rpcif *rpc =  in rpcif_spi_mem_dirmap_read()  local
82 		spi_controller_get_devdata(desc->mem->spi->controller);  in rpcif_spi_mem_dirmap_read()
84 	if (offs + desc->info.offset + len > U32_MAX)  in rpcif_spi_mem_dirmap_read()
85 		return -EINVAL;  in rpcif_spi_mem_dirmap_read()
87 	rpcif_spi_mem_prepare(desc->mem->spi, &desc->info.op_tmpl, &offs, &len);  in rpcif_spi_mem_dirmap_read()
89 	return rpcif_dirmap_read(rpc->dev, offs, len, buf);  in rpcif_spi_mem_dirmap_read()
94 	struct rpcif *rpc =  in rpcif_spi_mem_dirmap_create()  local
95 		spi_controller_get_devdata(desc->mem->spi->controller);  in rpcif_spi_mem_dirmap_create()
97 	if (desc->info.offset + desc->info.length > U32_MAX)  in rpcif_spi_mem_dirmap_create()
98 		return -ENOTSUPP;  in rpcif_spi_mem_dirmap_create()
100 	if (!rpcif_spi_mem_supports_op(desc->mem, &desc->info.op_tmpl))  in rpcif_spi_mem_dirmap_create()
101 		return -ENOTSUPP;  in rpcif_spi_mem_dirmap_create()
103 	if (!rpc->dirmap && desc->info.op_tmpl.data.dir == SPI_MEM_DATA_IN)  in rpcif_spi_mem_dirmap_create()
104 		return -ENOTSUPP;  in rpcif_spi_mem_dirmap_create()
106 	if (desc->info.op_tmpl.data.dir == SPI_MEM_DATA_OUT)  in rpcif_spi_mem_dirmap_create()
107 		return -ENOTSUPP;  in rpcif_spi_mem_dirmap_create()
115 	struct rpcif *rpc =  in rpcif_spi_mem_exec_op()  local
116 		spi_controller_get_devdata(mem->spi->controller);  in rpcif_spi_mem_exec_op()
118 	rpcif_spi_mem_prepare(mem->spi, op, NULL, NULL);  in rpcif_spi_mem_exec_op()
120 	return rpcif_manual_xfer(rpc->dev);  in rpcif_spi_mem_exec_op()
132 	struct device *parent = pdev->dev.parent;  in rpcif_spi_probe()
134 	struct rpcif *rpc;  in rpcif_spi_probe()  local
137 	ctlr = devm_spi_alloc_host(&pdev->dev, sizeof(*rpc));  in rpcif_spi_probe()
138 	if (!ctlr)  in rpcif_spi_probe()
139 		return -ENOMEM;  in rpcif_spi_probe()
141 	rpc = spi_controller_get_devdata(ctlr);  in rpcif_spi_probe()
142 	error = rpcif_sw_init(rpc, parent);  in rpcif_spi_probe()
143 	if (error)  in rpcif_spi_probe()
148 	ctlr->dev.of_node = parent->of_node;  in rpcif_spi_probe()
150 	pm_runtime_enable(rpc->dev);  in rpcif_spi_probe()
152 	ctlr->num_chipselect = 1;  in rpcif_spi_probe()
153 	ctlr->mem_ops = &rpcif_spi_mem_ops;  in rpcif_spi_probe()
155 	ctlr->bits_per_word_mask = SPI_BPW_MASK(8);  in rpcif_spi_probe()
156 	ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_TX_QUAD | SPI_RX_QUAD;  in rpcif_spi_probe()
157 	ctlr->flags = SPI_CONTROLLER_HALF_DUPLEX;  in rpcif_spi_probe()
159 	error = rpcif_hw_init(rpc->dev, false);  in rpcif_spi_probe()
160 	if (error)  in rpcif_spi_probe()
164 	if (error) {  in rpcif_spi_probe()
165 		dev_err(&pdev->dev, "spi_register_controller failed\n");  in rpcif_spi_probe()
172 	pm_runtime_disable(rpc->dev);  in rpcif_spi_probe()
179 	struct rpcif *rpc = spi_controller_get_devdata(ctlr);  in rpcif_spi_remove()  local
182 	pm_runtime_disable(rpc->dev);  in rpcif_spi_remove()
205 		.name	= "rpc-if-spi",
213 MODULE_DESCRIPTION("Renesas RPC-IF SPI driver");