1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Copyright (C) 2022 Hewlett-Packard Development Company, L.P. */
8 #include <linux/spi/spi-mem.h>
32 	struct gxp_spi *spifi;  member
50 static void gxp_spi_set_mode(struct gxp_spi *spifi, int mode)  in gxp_spi_set_mode()  argument
53 	void __iomem *reg_base = spifi->reg_base;  in gxp_spi_set_mode()
70 	struct gxp_spi *spifi = chip->spifi;  in gxp_spi_read_reg()  local
71 	void __iomem *reg_base = spifi->reg_base;  in gxp_spi_read_reg()
76 	value |= (chip->cs << 24);  in gxp_spi_read_reg()
83 	writeb(op->cmd.opcode, reg_base + OFFSET_SPICMD);  in gxp_spi_read_reg()
85 	writew(op->data.nbytes, reg_base + OFFSET_SPIDCNT);  in gxp_spi_read_reg()
97 		dev_warn(spifi->dev, "read reg busy time out\n");  in gxp_spi_read_reg()
101 	memcpy_fromio(op->data.buf.in, spifi->dat_base, op->data.nbytes);  in gxp_spi_read_reg()
108 	struct gxp_spi *spifi = chip->spifi;  in gxp_spi_write_reg()  local
109 	void __iomem *reg_base = spifi->reg_base;  in gxp_spi_write_reg()
114 	value |= (chip->cs << 24);  in gxp_spi_write_reg()
121 	writeb(op->cmd.opcode, reg_base + OFFSET_SPICMD);  in gxp_spi_write_reg()
123 	memcpy_toio(spifi->dat_base, op->data.buf.in, op->data.nbytes);  in gxp_spi_write_reg()
125 	writew(op->data.nbytes, reg_base + OFFSET_SPIDCNT);  in gxp_spi_write_reg()
137 		dev_warn(spifi->dev, "write reg busy time out\n");  in gxp_spi_write_reg()
144 	struct gxp_spi *spifi = chip->spifi;  in gxp_spi_read()  local
145 	u32 offset = op->addr.val;  in gxp_spi_read()
147 	if (chip->cs == 0)  in gxp_spi_read()
150 	memcpy_fromio(op->data.buf.in, spifi->dir_base + offset, op->data.nbytes);  in gxp_spi_read()
157 	struct gxp_spi *spifi = chip->spifi;  in gxp_spi_write()  local
158 	void __iomem *reg_base = spifi->reg_base;  in gxp_spi_write()
163 	write_len = op->data.nbytes;  in gxp_spi_write()
169 	value |= (chip->cs << 24);  in gxp_spi_write()
171 	value |= (op->addr.nbytes << 16);  in gxp_spi_write()
175 	writel(op->addr.val, reg_base + OFFSET_SPIADDR);  in gxp_spi_write()
177 	writeb(op->cmd.opcode, reg_base + OFFSET_SPICMD);  in gxp_spi_write()
181 	memcpy_toio(spifi->dat_base, op->data.buf.in, write_len);  in gxp_spi_write()
193 		dev_warn(spifi->dev, "write busy time out\n");  in gxp_spi_write()
202 	struct gxp_spi *spifi = spi_controller_get_devdata(mem->spi->controller);  in do_gxp_exec_mem_op()  local
203 	struct gxp_spi_chip *chip = &spifi->chips[spi_get_chipselect(mem->spi, 0)];  in do_gxp_exec_mem_op()
206 	if (op->data.dir == SPI_MEM_DATA_IN) {  in do_gxp_exec_mem_op()
207 		if (!op->addr.nbytes)  in do_gxp_exec_mem_op()
212 		if (!op->addr.nbytes)  in do_gxp_exec_mem_op()
227 		dev_err(&mem->spi->dev, "operation failed: %d", ret);  in gxp_exec_mem_op()
238 	struct gxp_spi *spifi = spi_controller_get_devdata(spi->controller);  in gxp_spi_setup()  local
240 	struct gxp_spi_chip *chip = &spifi->chips[cs];  in gxp_spi_setup()
242 	chip->spifi = spifi;  in gxp_spi_setup()
243 	chip->cs = cs;  in gxp_spi_setup()
245 	gxp_spi_set_mode(spifi, MANUAL_MODE);  in gxp_spi_setup()
252 	struct device *dev = &pdev->dev;  in gxp_spifi_probe()
255 	struct gxp_spi *spifi;  in gxp_spifi_probe()  local
258 	data = of_device_get_match_data(&pdev->dev);  in gxp_spifi_probe()
260 	ctlr = devm_spi_alloc_host(dev, sizeof(*spifi));  in gxp_spifi_probe()
262 		return -ENOMEM;  in gxp_spifi_probe()
264 	spifi = spi_controller_get_devdata(ctlr);  in gxp_spifi_probe()
266 	platform_set_drvdata(pdev, spifi);  in gxp_spifi_probe()
267 	spifi->data = data;  in gxp_spifi_probe()
268 	spifi->dev = dev;  in gxp_spifi_probe()
270 	spifi->reg_base = devm_platform_ioremap_resource(pdev, 0);  in gxp_spifi_probe()
271 	if (IS_ERR(spifi->reg_base))  in gxp_spifi_probe()
272 		return PTR_ERR(spifi->reg_base);  in gxp_spifi_probe()
274 	spifi->dat_base = devm_platform_ioremap_resource(pdev, 1);  in gxp_spifi_probe()
275 	if (IS_ERR(spifi->dat_base))  in gxp_spifi_probe()
276 		return PTR_ERR(spifi->dat_base);  in gxp_spifi_probe()
278 	spifi->dir_base = devm_platform_ioremap_resource(pdev, 2);  in gxp_spifi_probe()
279 	if (IS_ERR(spifi->dir_base))  in gxp_spifi_probe()
280 		return PTR_ERR(spifi->dir_base);  in gxp_spifi_probe()
282 	ctlr->mode_bits = data->mode_bits;  in gxp_spifi_probe()
283 	ctlr->bus_num = pdev->id;  in gxp_spifi_probe()
284 	ctlr->mem_ops = &gxp_spi_mem_ops;  in gxp_spifi_probe()
285 	ctlr->setup = gxp_spi_setup;  in gxp_spifi_probe()
286 	ctlr->num_chipselect = data->max_cs;  in gxp_spifi_probe()
287 	ctlr->dev.of_node = dev->of_node;  in gxp_spifi_probe()
291 		return dev_err_probe(&pdev->dev, ret,  in gxp_spifi_probe()
304 	{.compatible = "hpe,gxp-spifi", .data = &gxp_spifi_data },
312 		.name = "gxp-spifi",
318 MODULE_DESCRIPTION("HPE GXP SPI Flash Interface driver");