1 // SPDX-License-Identifier: GPL-2.0-only
18 #include <linux/spi/spi-mem.h>
48 /* IO Mode definition in HISI_SFC_V3XX_CMD_CFG */
58  * The IO modes lookup table. hisi_sfc_v3xx_io_modes[(z - 1) / 2][y / 2][x / 2]
59  * stands for x-y-z mode, as described in SFDP terminology. -EIO indicates
60  * an invalid mode.
65 		{ HISI_SFC_V3XX_DIO, HISI_SFC_V3XX_FULL_DIO, -EIO },
66 		{ -EIO, -EIO, -EIO },
70 		{ -EIO, -EIO, -EIO },
71 		{ HISI_SFC_V3XX_QIO, -EIO, HISI_SFC_V3XX_FULL_QIO },
86 	writel(0, host->regbase + HISI_SFC_V3XX_INT_MASK);  in hisi_sfc_v3xx_disable_int()
91 	writel(HISI_SFC_V3XX_INT_MASK_ALL, host->regbase + HISI_SFC_V3XX_INT_MASK);  in hisi_sfc_v3xx_enable_int()
96 	writel(HISI_SFC_V3XX_INT_MASK_ALL, host->regbase + HISI_SFC_V3XX_INT_CLR);  in hisi_sfc_v3xx_clear_int()
108 	reg = readl(host->regbase + HISI_SFC_V3XX_RAW_INT_STAT);  in hisi_sfc_v3xx_handle_completion()
112 		dev_err(host->dev, "fail to access protected address\n");  in hisi_sfc_v3xx_handle_completion()
113 		return -EIO;  in hisi_sfc_v3xx_handle_completion()
117 		dev_err(host->dev, "page program operation failed\n");  in hisi_sfc_v3xx_handle_completion()
118 		return -EIO;  in hisi_sfc_v3xx_handle_completion()
127 		dev_err(host->dev, "unsupported error occurred, status=0x%x\n", reg);  in hisi_sfc_v3xx_handle_completion()
128 		return -EIO;  in hisi_sfc_v3xx_handle_completion()
141 	return readl_poll_timeout(host->regbase + HISI_SFC_V3XX_CMD_CFG, reg,  in hisi_sfc_v3xx_wait_cmd_idle()
148 					struct spi_mem_op *op)  in hisi_sfc_v3xx_adjust_op_size()  argument
150 	struct spi_device *spi = mem->spi;  in hisi_sfc_v3xx_adjust_op_size()
152 	uintptr_t addr = (uintptr_t)op->data.buf.in;  in hisi_sfc_v3xx_adjust_op_size()
155 	host = spi_controller_get_devdata(spi->controller);  in hisi_sfc_v3xx_adjust_op_size()
157 	max_byte_count = host->max_cmd_dword * 4;  in hisi_sfc_v3xx_adjust_op_size()
159 	if (!IS_ALIGNED(addr, 4) && op->data.nbytes >= 4)  in hisi_sfc_v3xx_adjust_op_size()
160 		op->data.nbytes = 4 - (addr % 4);  in hisi_sfc_v3xx_adjust_op_size()
161 	else if (op->data.nbytes > max_byte_count)  in hisi_sfc_v3xx_adjust_op_size()
162 		op->data.nbytes = max_byte_count;  in hisi_sfc_v3xx_adjust_op_size()
168  * The controller only supports Standard SPI mode, Dual mode and
169  * Quad mode. Double sanitize the ops here to avoid OOB access.
172 				      const struct spi_mem_op *op)  in hisi_sfc_v3xx_supports_op()  argument
174 	struct spi_device *spi = mem->spi;  in hisi_sfc_v3xx_supports_op()
177 	host = spi_controller_get_devdata(spi->controller);  in hisi_sfc_v3xx_supports_op()
179 	if (op->data.buswidth > 4 || op->dummy.buswidth > 4 ||  in hisi_sfc_v3xx_supports_op()
180 	    op->addr.buswidth > 4 || op->cmd.buswidth > 4)  in hisi_sfc_v3xx_supports_op()
183 	if (op->addr.nbytes != host->address_mode && op->addr.nbytes)  in hisi_sfc_v3xx_supports_op()
186 	return spi_mem_default_supports_op(mem, op);  in hisi_sfc_v3xx_supports_op()
190  * memcpy_{to,from}io doesn't gurantee 32b accesses - which we require for the
191  * DATABUF registers -so use __io{read,write}32_copy when possible. For
192  * trailing bytes, copy them byte-by-byte from the DATABUF register, as we
204 	from = host->regbase + HISI_SFC_V3XX_CMD_DATABUF0;  in hisi_sfc_v3xx_read_databuf()
211 		len -= words * 4;  in hisi_sfc_v3xx_read_databuf()
241 	to = host->regbase + HISI_SFC_V3XX_CMD_DATABUF0;  in hisi_sfc_v3xx_write_databuf()
248 		len -= words * 4;  in hisi_sfc_v3xx_write_databuf()
274 				   const struct spi_mem_op *op,  in hisi_sfc_v3xx_start_bus()  argument
277 	int len = op->data.nbytes, buswidth_mode;  in hisi_sfc_v3xx_start_bus()
280 	if (op->addr.nbytes)  in hisi_sfc_v3xx_start_bus()
283 	if (op->data.buswidth == 0 || op->data.buswidth == 1) {  in hisi_sfc_v3xx_start_bus()
288 		data_idx = (op->data.buswidth - 1) / 2;  in hisi_sfc_v3xx_start_bus()
289 		addr_idx = op->addr.buswidth / 2;  in hisi_sfc_v3xx_start_bus()
290 		cmd_idx = op->cmd.buswidth / 2;  in hisi_sfc_v3xx_start_bus()
297 	if (op->data.dir != SPI_MEM_NO_DATA) {  in hisi_sfc_v3xx_start_bus()
298 		config |= (len - 1) << HISI_SFC_V3XX_CMD_CFG_DATA_CNT_OFF;  in hisi_sfc_v3xx_start_bus()
302 	if (op->data.dir == SPI_MEM_DATA_IN)  in hisi_sfc_v3xx_start_bus()
305 	config |= op->dummy.nbytes << HISI_SFC_V3XX_CMD_CFG_DUMMY_CNT_OFF |  in hisi_sfc_v3xx_start_bus()
309 	writel(op->addr.val, host->regbase + HISI_SFC_V3XX_CMD_ADDR);  in hisi_sfc_v3xx_start_bus()
310 	writel(op->cmd.opcode, host->regbase + HISI_SFC_V3XX_CMD_INS);  in hisi_sfc_v3xx_start_bus()
312 	writel(config, host->regbase + HISI_SFC_V3XX_CMD_CFG);  in hisi_sfc_v3xx_start_bus()
318 					 const struct spi_mem_op *op,  in hisi_sfc_v3xx_generic_exec_op()  argument
324 	if (host->irq) {  in hisi_sfc_v3xx_generic_exec_op()
325 		host->completion = &done;  in hisi_sfc_v3xx_generic_exec_op()
329 	if (op->data.dir == SPI_MEM_DATA_OUT)  in hisi_sfc_v3xx_generic_exec_op()
330 		hisi_sfc_v3xx_write_databuf(host, op->data.buf.out, op->data.nbytes);  in hisi_sfc_v3xx_generic_exec_op()
332 	ret = hisi_sfc_v3xx_start_bus(host, op, chip_select);  in hisi_sfc_v3xx_generic_exec_op()
336 	if (host->irq) {  in hisi_sfc_v3xx_generic_exec_op()
337 		ret = wait_for_completion_timeout(host->completion,  in hisi_sfc_v3xx_generic_exec_op()
340 			ret = -ETIMEDOUT;  in hisi_sfc_v3xx_generic_exec_op()
345 		synchronize_irq(host->irq);  in hisi_sfc_v3xx_generic_exec_op()
346 		host->completion = NULL;  in hisi_sfc_v3xx_generic_exec_op()
351 		return -EIO;  in hisi_sfc_v3xx_generic_exec_op()
353 	if (op->data.dir == SPI_MEM_DATA_IN)  in hisi_sfc_v3xx_generic_exec_op()
354 		hisi_sfc_v3xx_read_databuf(host, op->data.buf.in, op->data.nbytes);  in hisi_sfc_v3xx_generic_exec_op()
360 				 const struct spi_mem_op *op)  in hisi_sfc_v3xx_exec_op()  argument
363 	struct spi_device *spi = mem->spi;  in hisi_sfc_v3xx_exec_op()
366 	host = spi_controller_get_devdata(spi->controller);  in hisi_sfc_v3xx_exec_op()
368 	return hisi_sfc_v3xx_generic_exec_op(host, op, chip_select);  in hisi_sfc_v3xx_exec_op()
382 	reg = readl(host->regbase + HISI_SFC_V3XX_INT_STAT);  in hisi_sfc_v3xx_isr()
388 	complete(host->completion);  in hisi_sfc_v3xx_isr()
433 	struct device *dev = &pdev->dev;  in hisi_sfc_v3xx_probe()
439 	ctlr = spi_alloc_host(&pdev->dev, sizeof(*host));  in hisi_sfc_v3xx_probe()
441 		return -ENOMEM;  in hisi_sfc_v3xx_probe()
443 	ctlr->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD |  in hisi_sfc_v3xx_probe()
446 	ctlr->buswidth_override_bits = hisi_sfc_v3xx_buswidth_override_bits;  in hisi_sfc_v3xx_probe()
449 	host->dev = dev;  in hisi_sfc_v3xx_probe()
453 	host->regbase = devm_platform_ioremap_resource(pdev, 0);  in hisi_sfc_v3xx_probe()
454 	if (IS_ERR(host->regbase)) {  in hisi_sfc_v3xx_probe()
455 		ret = PTR_ERR(host->regbase);  in hisi_sfc_v3xx_probe()
459 	host->irq = platform_get_irq_optional(pdev, 0);  in hisi_sfc_v3xx_probe()
460 	if (host->irq == -EPROBE_DEFER) {  in hisi_sfc_v3xx_probe()
461 		ret = -EPROBE_DEFER;  in hisi_sfc_v3xx_probe()
467 	if (host->irq > 0) {  in hisi_sfc_v3xx_probe()
468 		ret = devm_request_irq(dev, host->irq, hisi_sfc_v3xx_isr, 0,  in hisi_sfc_v3xx_probe()
469 				       "hisi-sfc-v3xx", host);  in hisi_sfc_v3xx_probe()
472 			dev_err(dev, "failed to request irq%d, ret = %d\n", host->irq, ret);  in hisi_sfc_v3xx_probe()
473 			host->irq = 0;  in hisi_sfc_v3xx_probe()
476 		host->irq = 0;  in hisi_sfc_v3xx_probe()
479 	ctlr->bus_num = -1;  in hisi_sfc_v3xx_probe()
480 	ctlr->num_chipselect = 1;  in hisi_sfc_v3xx_probe()
481 	ctlr->mem_ops = &hisi_sfc_v3xx_mem_ops;  in hisi_sfc_v3xx_probe()
484 	 * The address mode of the controller is either 3 or 4,  in hisi_sfc_v3xx_probe()
485 	 * which is indicated by the address mode bit in  in hisi_sfc_v3xx_probe()
489 	glb_config = readl(host->regbase + HISI_SFC_V3XX_GLB_CFG);  in hisi_sfc_v3xx_probe()
491 		host->address_mode = 4;  in hisi_sfc_v3xx_probe()
493 		host->address_mode = 3;  in hisi_sfc_v3xx_probe()
495 	version = readl(host->regbase + HISI_SFC_V3XX_VERSION);  in hisi_sfc_v3xx_probe()
498 		host->max_cmd_dword = 64;  in hisi_sfc_v3xx_probe()
500 		host->max_cmd_dword = 16;  in hisi_sfc_v3xx_probe()
506 	dev_info(&pdev->dev, "hw version 0x%x, %s mode.\n",  in hisi_sfc_v3xx_probe()
507 		 version, host->irq ? "irq" : "polling");  in hisi_sfc_v3xx_probe()
524 		.name	= "hisi-sfc-v3xx",