1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * drivers/ata/pata_palmld.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Driver for IDE channel in Palm LifeDrive
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Based on research of:
8*4882a593Smuzhiyun * Alex Osborne <ato@meshy.org>
9*4882a593Smuzhiyun *
10*4882a593Smuzhiyun * Rewrite for mainline:
11*4882a593Smuzhiyun * Marek Vasut <marek.vasut@gmail.com>
12*4882a593Smuzhiyun *
13*4882a593Smuzhiyun * Rewritten version based on pata_ixp4xx_cf.c:
14*4882a593Smuzhiyun * ixp4xx PATA/Compact Flash driver
15*4882a593Smuzhiyun * Copyright (C) 2006-07 Tower Technologies
16*4882a593Smuzhiyun * Author: Alessandro Zummo <a.zummo@towertech.it>
17*4882a593Smuzhiyun */
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #include <linux/kernel.h>
20*4882a593Smuzhiyun #include <linux/module.h>
21*4882a593Smuzhiyun #include <linux/libata.h>
22*4882a593Smuzhiyun #include <linux/irq.h>
23*4882a593Smuzhiyun #include <linux/platform_device.h>
24*4882a593Smuzhiyun #include <linux/delay.h>
25*4882a593Smuzhiyun #include <linux/gpio/consumer.h>
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun #include <scsi/scsi_host.h>
28*4882a593Smuzhiyun #include <mach/palmld.h>
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun #define DRV_NAME "pata_palmld"
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun struct palmld_pata {
33*4882a593Smuzhiyun struct ata_host *host;
34*4882a593Smuzhiyun struct gpio_desc *power;
35*4882a593Smuzhiyun struct gpio_desc *reset;
36*4882a593Smuzhiyun };
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun static struct scsi_host_template palmld_sht = {
39*4882a593Smuzhiyun ATA_PIO_SHT(DRV_NAME),
40*4882a593Smuzhiyun };
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun static struct ata_port_operations palmld_port_ops = {
43*4882a593Smuzhiyun .inherits = &ata_sff_port_ops,
44*4882a593Smuzhiyun .sff_data_xfer = ata_sff_data_xfer32,
45*4882a593Smuzhiyun .cable_detect = ata_cable_40wire,
46*4882a593Smuzhiyun };
47*4882a593Smuzhiyun
palmld_pata_probe(struct platform_device * pdev)48*4882a593Smuzhiyun static int palmld_pata_probe(struct platform_device *pdev)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun struct palmld_pata *lda;
51*4882a593Smuzhiyun struct ata_port *ap;
52*4882a593Smuzhiyun void __iomem *mem;
53*4882a593Smuzhiyun struct device *dev = &pdev->dev;
54*4882a593Smuzhiyun int ret;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun lda = devm_kzalloc(dev, sizeof(*lda), GFP_KERNEL);
57*4882a593Smuzhiyun if (!lda)
58*4882a593Smuzhiyun return -ENOMEM;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun /* allocate host */
61*4882a593Smuzhiyun lda->host = ata_host_alloc(dev, 1);
62*4882a593Smuzhiyun if (!lda->host)
63*4882a593Smuzhiyun return -ENOMEM;
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun /* remap drive's physical memory address */
66*4882a593Smuzhiyun mem = devm_ioremap(dev, PALMLD_IDE_PHYS, 0x1000);
67*4882a593Smuzhiyun if (!mem)
68*4882a593Smuzhiyun return -ENOMEM;
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun /* request and activate power and reset GPIOs */
71*4882a593Smuzhiyun lda->power = devm_gpiod_get(dev, "power", GPIOD_OUT_HIGH);
72*4882a593Smuzhiyun if (IS_ERR(lda->power))
73*4882a593Smuzhiyun return PTR_ERR(lda->power);
74*4882a593Smuzhiyun lda->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
75*4882a593Smuzhiyun if (IS_ERR(lda->reset)) {
76*4882a593Smuzhiyun gpiod_set_value(lda->power, 0);
77*4882a593Smuzhiyun return PTR_ERR(lda->reset);
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun /* Assert reset to reset the drive */
81*4882a593Smuzhiyun gpiod_set_value(lda->reset, 1);
82*4882a593Smuzhiyun msleep(30);
83*4882a593Smuzhiyun gpiod_set_value(lda->reset, 0);
84*4882a593Smuzhiyun msleep(30);
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun /* setup the ata port */
87*4882a593Smuzhiyun ap = lda->host->ports[0];
88*4882a593Smuzhiyun ap->ops = &palmld_port_ops;
89*4882a593Smuzhiyun ap->pio_mask = ATA_PIO4;
90*4882a593Smuzhiyun ap->flags |= ATA_FLAG_PIO_POLLING;
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun /* memory mapping voodoo */
93*4882a593Smuzhiyun ap->ioaddr.cmd_addr = mem + 0x10;
94*4882a593Smuzhiyun ap->ioaddr.altstatus_addr = mem + 0xe;
95*4882a593Smuzhiyun ap->ioaddr.ctl_addr = mem + 0xe;
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun /* start the port */
98*4882a593Smuzhiyun ata_sff_std_ports(&ap->ioaddr);
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun /* activate host */
101*4882a593Smuzhiyun ret = ata_host_activate(lda->host, 0, NULL, IRQF_TRIGGER_RISING,
102*4882a593Smuzhiyun &palmld_sht);
103*4882a593Smuzhiyun /* power down on failure */
104*4882a593Smuzhiyun if (ret) {
105*4882a593Smuzhiyun gpiod_set_value(lda->power, 0);
106*4882a593Smuzhiyun return ret;
107*4882a593Smuzhiyun }
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun platform_set_drvdata(pdev, lda);
110*4882a593Smuzhiyun return 0;
111*4882a593Smuzhiyun }
112*4882a593Smuzhiyun
palmld_pata_remove(struct platform_device * pdev)113*4882a593Smuzhiyun static int palmld_pata_remove(struct platform_device *pdev)
114*4882a593Smuzhiyun {
115*4882a593Smuzhiyun struct palmld_pata *lda = platform_get_drvdata(pdev);
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun ata_platform_remove_one(pdev);
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun /* power down the HDD */
120*4882a593Smuzhiyun gpiod_set_value(lda->power, 0);
121*4882a593Smuzhiyun
122*4882a593Smuzhiyun return 0;
123*4882a593Smuzhiyun }
124*4882a593Smuzhiyun
125*4882a593Smuzhiyun static struct platform_driver palmld_pata_platform_driver = {
126*4882a593Smuzhiyun .driver = {
127*4882a593Smuzhiyun .name = DRV_NAME,
128*4882a593Smuzhiyun },
129*4882a593Smuzhiyun .probe = palmld_pata_probe,
130*4882a593Smuzhiyun .remove = palmld_pata_remove,
131*4882a593Smuzhiyun };
132*4882a593Smuzhiyun
133*4882a593Smuzhiyun module_platform_driver(palmld_pata_platform_driver);
134*4882a593Smuzhiyun
135*4882a593Smuzhiyun MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
136*4882a593Smuzhiyun MODULE_DESCRIPTION("PalmLD PATA driver");
137*4882a593Smuzhiyun MODULE_LICENSE("GPL");
138*4882a593Smuzhiyun MODULE_ALIAS("platform:" DRV_NAME);
139