1 // SPDX-License-Identifier: GPL-2.0-only
3  * ixp4xx PATA/Compact Flash driver
4  * Copyright (C) 2006-07 Tower Technologies
7  * An ATA driver to handle a Compact Flash connected
8  * to the ixp4xx expansion bus in TrueIDE mode. The CF
10  * on the ixp4xx. In the irq is not available, you might
50 #define IXP4XX_EXP_BYTE_RD16	BIT(6) /* Byte reads on half-word devices */
57 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
61 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
65 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
69 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
73 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
79 	regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
87 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
91 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
95 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
99 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
103 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
109 	regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
116 	struct ixp4xx_pata *ixpp = ap->host->private_data;  in ixp4xx_set_piomode()
119 		       adev->pio_mode - XFER_PIO_0);  in ixp4xx_set_piomode()
120 	ixp4xx_set_8bit_timing(ixpp, adev->pio_mode);  in ixp4xx_set_piomode()
130 	struct ata_device *adev = qc->dev;  in ixp4xx_mmio_data_xfer()
131 	struct ata_port *ap = qc->dev->link->ap;  in ixp4xx_mmio_data_xfer()
132 	void __iomem *mmio = ap->ioaddr.data_addr;  in ixp4xx_mmio_data_xfer()
133 	struct ixp4xx_pata *ixpp = ap->host->private_data;  in ixp4xx_mmio_data_xfer()
138 	spin_lock_irqsave(ap->lock, flags);  in ixp4xx_mmio_data_xfer()
143 	ixp4xx_set_16bit_timing(ixpp, adev->pio_mode);  in ixp4xx_mmio_data_xfer()
157 		unsigned char *trailing_buf = buf + buflen - 1;  in ixp4xx_mmio_data_xfer()
169 	ixp4xx_set_8bit_timing(ixpp, adev->pio_mode);  in ixp4xx_mmio_data_xfer()
172 	spin_unlock_irqrestore(ap->lock, flags);  in ixp4xx_mmio_data_xfer()
198 	struct ata_ioports *ioaddr = &ap->ioaddr;  in ixp4xx_setup_port()
201 	ioaddr->cmd_addr	= ixpp->cmd;  in ixp4xx_setup_port()
202 	ioaddr->altstatus_addr	= ixpp->ctl + 0x06;  in ixp4xx_setup_port()
203 	ioaddr->ctl_addr	= ixpp->ctl + 0x06;  in ixp4xx_setup_port()
209 		 * ixp4xx in little endian mode.  in ixp4xx_setup_port()
212 		*(unsigned long *)&ioaddr->data_addr		^= 0x02;  in ixp4xx_setup_port()
213 		*(unsigned long *)&ioaddr->cmd_addr		^= 0x03;  in ixp4xx_setup_port()
214 		*(unsigned long *)&ioaddr->altstatus_addr	^= 0x03;  in ixp4xx_setup_port()
215 		*(unsigned long *)&ioaddr->ctl_addr		^= 0x03;  in ixp4xx_setup_port()
216 		*(unsigned long *)&ioaddr->error_addr		^= 0x03;  in ixp4xx_setup_port()
217 		*(unsigned long *)&ioaddr->feature_addr		^= 0x03;  in ixp4xx_setup_port()
218 		*(unsigned long *)&ioaddr->nsect_addr		^= 0x03;  in ixp4xx_setup_port()
219 		*(unsigned long *)&ioaddr->lbal_addr		^= 0x03;  in ixp4xx_setup_port()
220 		*(unsigned long *)&ioaddr->lbam_addr		^= 0x03;  in ixp4xx_setup_port()
221 		*(unsigned long *)&ioaddr->lbah_addr		^= 0x03;  in ixp4xx_setup_port()
222 		*(unsigned long *)&ioaddr->device_addr		^= 0x03;  in ixp4xx_setup_port()
223 		*(unsigned long *)&ioaddr->status_addr		^= 0x03;  in ixp4xx_setup_port()
224 		*(unsigned long *)&ioaddr->command_addr		^= 0x03;  in ixp4xx_setup_port()
238 	struct device *dev = &pdev->dev;  in ixp4xx_pata_probe()
239 	struct device_node *np = dev->of_node;  in ixp4xx_pata_probe()
247 		return -ENOMEM;  in ixp4xx_pata_probe()
249 	ixpp->rmap = syscon_node_to_regmap(np->parent);  in ixp4xx_pata_probe()
250 	if (IS_ERR(ixpp->rmap))  in ixp4xx_pata_probe()
251 		return dev_err_probe(dev, PTR_ERR(ixpp->rmap), "no regmap\n");  in ixp4xx_pata_probe()
257 	ixpp->cmd_csreg = csindex * IXP4XX_EXP_TIMING_STRIDE;  in ixp4xx_pata_probe()
259 	ixpp->host = ata_host_alloc_pinfo(dev, ppi, 1);  in ixp4xx_pata_probe()
260 	if (!ixpp->host)  in ixp4xx_pata_probe()
261 		return -ENOMEM;  in ixp4xx_pata_probe()
262 	ixpp->host->private_data = ixpp;  in ixp4xx_pata_probe()
268 	ixpp->cmd = devm_platform_get_and_ioremap_resource(pdev, 0, &cmd);  in ixp4xx_pata_probe()
269 	if (IS_ERR(ixpp->cmd))  in ixp4xx_pata_probe()
270 		return PTR_ERR(ixpp->cmd);  in ixp4xx_pata_probe()
272 	ixpp->ctl = devm_platform_get_and_ioremap_resource(pdev, 1, &ctl);  in ixp4xx_pata_probe()
273 	if (IS_ERR(ixpp->ctl))  in ixp4xx_pata_probe()
274 		return PTR_ERR(ixpp->ctl);  in ixp4xx_pata_probe()
282 	ixp4xx_setup_port(ixpp->host->ports[0], ixpp, cmd->start, ctl->start);  in ixp4xx_pata_probe()
286 	return ata_host_activate(ixpp->host, irq, ata_sff_interrupt, 0, &ixp4xx_sht);  in ixp4xx_pata_probe()
290 	{ .compatible = "intel,ixp4xx-compact-flash", },
306 MODULE_DESCRIPTION("low-level driver for ixp4xx Compact Flash PATA");