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
49 #define IXP4XX_EXP_BYTE_RD16	BIT(6) /* Byte reads on half-word devices */
56 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
60 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
64 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
68 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
72 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
78 	regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_8bit_timing()
86 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
90 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
94 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
98 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
102 		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
108 	regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,  in ixp4xx_set_16bit_timing()
115 	struct ixp4xx_pata *ixpp = ap->host->private_data;  in ixp4xx_set_piomode()
118 		       adev->pio_mode - XFER_PIO_0);  in ixp4xx_set_piomode()
119 	ixp4xx_set_8bit_timing(ixpp, adev->pio_mode);  in ixp4xx_set_piomode()
129 	struct ata_device *adev = qc->dev;  in ixp4xx_mmio_data_xfer()
130 	struct ata_port *ap = qc->dev->link->ap;  in ixp4xx_mmio_data_xfer()
131 	void __iomem *mmio = ap->ioaddr.data_addr;  in ixp4xx_mmio_data_xfer()
132 	struct ixp4xx_pata *ixpp = ap->host->private_data;  in ixp4xx_mmio_data_xfer()
137 	spin_lock_irqsave(ap->lock, flags);  in ixp4xx_mmio_data_xfer()
142 	ixp4xx_set_16bit_timing(ixpp, adev->pio_mode);  in ixp4xx_mmio_data_xfer()
156 		unsigned char *trailing_buf = buf + buflen - 1;  in ixp4xx_mmio_data_xfer()
168 	ixp4xx_set_8bit_timing(ixpp, adev->pio_mode);  in ixp4xx_mmio_data_xfer()
171 	spin_unlock_irqrestore(ap->lock, flags);  in ixp4xx_mmio_data_xfer()
197 	struct ata_ioports *ioaddr = &ap->ioaddr;  in ixp4xx_setup_port()
200 	ioaddr->cmd_addr	= ixpp->cmd;  in ixp4xx_setup_port()
201 	ioaddr->altstatus_addr	= ixpp->ctl + 0x06;  in ixp4xx_setup_port()
202 	ioaddr->ctl_addr	= ixpp->ctl + 0x06;  in ixp4xx_setup_port()
208 		 * ixp4xx in little endian mode.  in ixp4xx_setup_port()
211 		*(unsigned long *)&ioaddr->data_addr		^= 0x02;  in ixp4xx_setup_port()
212 		*(unsigned long *)&ioaddr->cmd_addr		^= 0x03;  in ixp4xx_setup_port()
213 		*(unsigned long *)&ioaddr->altstatus_addr	^= 0x03;  in ixp4xx_setup_port()
214 		*(unsigned long *)&ioaddr->ctl_addr		^= 0x03;  in ixp4xx_setup_port()
215 		*(unsigned long *)&ioaddr->error_addr		^= 0x03;  in ixp4xx_setup_port()
216 		*(unsigned long *)&ioaddr->feature_addr		^= 0x03;  in ixp4xx_setup_port()
217 		*(unsigned long *)&ioaddr->nsect_addr		^= 0x03;  in ixp4xx_setup_port()
218 		*(unsigned long *)&ioaddr->lbal_addr		^= 0x03;  in ixp4xx_setup_port()
219 		*(unsigned long *)&ioaddr->lbam_addr		^= 0x03;  in ixp4xx_setup_port()
220 		*(unsigned long *)&ioaddr->lbah_addr		^= 0x03;  in ixp4xx_setup_port()
221 		*(unsigned long *)&ioaddr->device_addr		^= 0x03;  in ixp4xx_setup_port()
222 		*(unsigned long *)&ioaddr->status_addr		^= 0x03;  in ixp4xx_setup_port()
223 		*(unsigned long *)&ioaddr->command_addr		^= 0x03;  in ixp4xx_setup_port()
237 	struct device *dev = &pdev->dev;  in ixp4xx_pata_probe()
238 	struct device_node *np = dev->of_node;  in ixp4xx_pata_probe()
248 		return -EINVAL;  in ixp4xx_pata_probe()
252 		return -ENOMEM;  in ixp4xx_pata_probe()
254 	ixpp->rmap = syscon_node_to_regmap(np->parent);  in ixp4xx_pata_probe()
255 	if (IS_ERR(ixpp->rmap))  in ixp4xx_pata_probe()
256 		return dev_err_probe(dev, PTR_ERR(ixpp->rmap), "no regmap\n");  in ixp4xx_pata_probe()
262 	ixpp->cmd_csreg = csindex * IXP4XX_EXP_TIMING_STRIDE;  in ixp4xx_pata_probe()
264 	ixpp->host = ata_host_alloc_pinfo(dev, ppi, 1);  in ixp4xx_pata_probe()
265 	if (!ixpp->host)  in ixp4xx_pata_probe()
266 		return -ENOMEM;  in ixp4xx_pata_probe()
267 	ixpp->host->private_data = ixpp;  in ixp4xx_pata_probe()
273 	ixpp->cmd = devm_ioremap_resource(dev, cmd);  in ixp4xx_pata_probe()
274 	ixpp->ctl = devm_ioremap_resource(dev, ctl);  in ixp4xx_pata_probe()
275 	if (IS_ERR(ixpp->cmd) || IS_ERR(ixpp->ctl))  in ixp4xx_pata_probe()
276 		return -ENOMEM;  in ixp4xx_pata_probe()
284 		return -EINVAL;  in ixp4xx_pata_probe()
287 	ixp4xx_setup_port(ixpp->host->ports[0], ixpp, cmd->start, ctl->start);  in ixp4xx_pata_probe()
291 	return ata_host_activate(ixpp->host, irq, ata_sff_interrupt, 0, &ixp4xx_sht);  in ixp4xx_pata_probe()
295 	{ .compatible = "intel,ixp4xx-compact-flash", },
311 MODULE_DESCRIPTION("low-level driver for ixp4xx Compact Flash PATA");