1 // SPDX-License-Identifier: GPL-2.0-only
3 * drivers/ata/pata_palmld.c
5 * Driver for IDE channel in Palm LifeDrive
7 * Based on research of:
8 * Alex Osborne <ato@meshy.org>
10 * Rewrite for mainline:
11 * Marek Vasut <marek.vasut@gmail.com>
13 * Rewritten version based on pata_ixp4xx_cf.c:
14 * ixp4xx PATA/Compact Flash driver
15 * Copyright (C) 2006-07 Tower Technologies
16 * Author: Alessandro Zummo <a.zummo@towertech.it>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/libata.h>
22 #include <linux/irq.h>
23 #include <linux/platform_device.h>
24 #include <linux/delay.h>
25 #include <linux/gpio/consumer.h>
27 #include <scsi/scsi_host.h>
29 #define DRV_NAME "pata_palmld"
32 struct ata_host *host;
33 struct gpio_desc *power;
34 struct gpio_desc *reset;
37 static struct scsi_host_template palmld_sht = {
38 ATA_PIO_SHT(DRV_NAME),
41 static struct ata_port_operations palmld_port_ops = {
42 .inherits = &ata_sff_port_ops,
43 .sff_data_xfer = ata_sff_data_xfer32,
44 .cable_detect = ata_cable_40wire,
47 static int palmld_pata_probe(struct platform_device *pdev)
49 struct palmld_pata *lda;
52 struct device *dev = &pdev->dev;
55 lda = devm_kzalloc(dev, sizeof(*lda), GFP_KERNEL);
60 lda->host = ata_host_alloc(dev, 1);
64 /* remap drive's physical memory address */
65 mem = devm_platform_ioremap_resource(pdev, 0);
69 /* request and activate power and reset GPIOs */
70 lda->power = devm_gpiod_get(dev, "power", GPIOD_OUT_HIGH);
71 if (IS_ERR(lda->power))
72 return PTR_ERR(lda->power);
73 lda->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
74 if (IS_ERR(lda->reset)) {
75 gpiod_set_value(lda->power, 0);
76 return PTR_ERR(lda->reset);
79 /* Assert reset to reset the drive */
80 gpiod_set_value(lda->reset, 1);
82 gpiod_set_value(lda->reset, 0);
85 /* setup the ata port */
86 ap = lda->host->ports[0];
87 ap->ops = &palmld_port_ops;
88 ap->pio_mask = ATA_PIO4;
89 ap->flags |= ATA_FLAG_PIO_POLLING;
91 /* memory mapping voodoo */
92 ap->ioaddr.cmd_addr = mem + 0x10;
93 ap->ioaddr.altstatus_addr = mem + 0xe;
94 ap->ioaddr.ctl_addr = mem + 0xe;
97 ata_sff_std_ports(&ap->ioaddr);
100 ret = ata_host_activate(lda->host, 0, NULL, IRQF_TRIGGER_RISING,
102 /* power down on failure */
104 gpiod_set_value(lda->power, 0);
108 platform_set_drvdata(pdev, lda);
112 static int palmld_pata_remove(struct platform_device *pdev)
114 struct palmld_pata *lda = platform_get_drvdata(pdev);
116 ata_platform_remove_one(pdev);
118 /* power down the HDD */
119 gpiod_set_value(lda->power, 0);
124 static struct platform_driver palmld_pata_platform_driver = {
128 .probe = palmld_pata_probe,
129 .remove = palmld_pata_remove,
132 module_platform_driver(palmld_pata_platform_driver);
134 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
135 MODULE_DESCRIPTION("PalmLD PATA driver");
136 MODULE_LICENSE("GPL");
137 MODULE_ALIAS("platform:" DRV_NAME);