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1/*
2 * drivers/ata/pata_palmld.c
3 *
4 * Driver for IDE channel in Palm LifeDrive
5 *
6 * Based on research of:
7 * Alex Osborne <ato@meshy.org>
8 *
9 * Rewrite for mainline:
10 * Marek Vasut <marek.vasut@gmail.com>
11 *
12 * Rewritten version based on pata_ixp4xx_cf.c:
13 * ixp4xx PATA/Compact Flash driver
14 * Copyright (C) 2006-07 Tower Technologies
15 * Author: Alessandro Zummo <a.zummo@towertech.it>
16 *
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License version 2 as
19 * published by the Free Software Foundation.
20 *
21 */
22
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/libata.h>
26#include <linux/irq.h>
27#include <linux/platform_device.h>
28#include <linux/delay.h>
29#include <linux/gpio.h>
30
31#include <scsi/scsi_host.h>
32#include <mach/palmld.h>
33
34#define DRV_NAME "pata_palmld"
35
36static struct gpio palmld_hdd_gpios[] = {
37 { GPIO_NR_PALMLD_IDE_PWEN, GPIOF_INIT_HIGH, "HDD Power" },
38 { GPIO_NR_PALMLD_IDE_RESET, GPIOF_INIT_LOW, "HDD Reset" },
39};
40
41static struct scsi_host_template palmld_sht = {
42 ATA_PIO_SHT(DRV_NAME),
43};
44
45static struct ata_port_operations palmld_port_ops = {
46 .inherits = &ata_sff_port_ops,
47 .sff_data_xfer = ata_sff_data_xfer_noirq,
48 .cable_detect = ata_cable_40wire,
49};
50
51static __devinit int palmld_pata_probe(struct platform_device *pdev)
52{
53 struct ata_host *host;
54 struct ata_port *ap;
55 void __iomem *mem;
56 int ret;
57
58 /* allocate host */
59 host = ata_host_alloc(&pdev->dev, 1);
60 if (!host) {
61 ret = -ENOMEM;
62 goto err1;
63 }
64
65 /* remap drive's physical memory address */
66 mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000);
67 if (!mem) {
68 ret = -ENOMEM;
69 goto err1;
70 }
71
72 /* request and activate power GPIO, IRQ GPIO */
73 ret = gpio_request_array(palmld_hdd_gpios,
74 ARRAY_SIZE(palmld_hdd_gpios));
75 if (ret)
76 goto err1;
77
78 /* reset the drive */
79 gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 0);
80 msleep(30);
81 gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 1);
82 msleep(30);
83
84 /* setup the ata port */
85 ap = host->ports[0];
86 ap->ops = &palmld_port_ops;
87 ap->pio_mask = ATA_PIO4;
88 ap->flags |= ATA_FLAG_PIO_POLLING;
89
90 /* memory mapping voodoo */
91 ap->ioaddr.cmd_addr = mem + 0x10;
92 ap->ioaddr.altstatus_addr = mem + 0xe;
93 ap->ioaddr.ctl_addr = mem + 0xe;
94
95 /* start the port */
96 ata_sff_std_ports(&ap->ioaddr);
97
98 /* activate host */
99 ret = ata_host_activate(host, 0, NULL, IRQF_TRIGGER_RISING,
100 &palmld_sht);
101 if (ret)
102 goto err2;
103
104 return ret;
105
106err2:
107 gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios));
108err1:
109 return ret;
110}
111
112static __devexit int palmld_pata_remove(struct platform_device *dev)
113{
114 struct ata_host *host = platform_get_drvdata(dev);
115
116 ata_host_detach(host);
117
118 /* power down the HDD */
119 gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0);
120
121 gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios));
122
123 return 0;
124}
125
126static struct platform_driver palmld_pata_platform_driver = {
127 .driver = {
128 .name = DRV_NAME,
129 .owner = THIS_MODULE,
130 },
131 .probe = palmld_pata_probe,
132 .remove = __devexit_p(palmld_pata_remove),
133};
134
135module_platform_driver(palmld_pata_platform_driver);
136
137MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
138MODULE_DESCRIPTION("PalmLD PATA driver");
139MODULE_LICENSE("GPL");
140MODULE_ALIAS("platform:" DRV_NAME);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * drivers/ata/pata_palmld.c
4 *
5 * Driver for IDE channel in Palm LifeDrive
6 *
7 * Based on research of:
8 * Alex Osborne <ato@meshy.org>
9 *
10 * Rewrite for mainline:
11 * Marek Vasut <marek.vasut@gmail.com>
12 *
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>
17 */
18
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>
26
27#include <scsi/scsi_host.h>
28
29#define DRV_NAME "pata_palmld"
30
31struct palmld_pata {
32 struct ata_host *host;
33 struct gpio_desc *power;
34 struct gpio_desc *reset;
35};
36
37static struct scsi_host_template palmld_sht = {
38 ATA_PIO_SHT(DRV_NAME),
39};
40
41static 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,
45};
46
47static int palmld_pata_probe(struct platform_device *pdev)
48{
49 struct palmld_pata *lda;
50 struct ata_port *ap;
51 void __iomem *mem;
52 struct device *dev = &pdev->dev;
53 int ret;
54
55 lda = devm_kzalloc(dev, sizeof(*lda), GFP_KERNEL);
56 if (!lda)
57 return -ENOMEM;
58
59 /* allocate host */
60 lda->host = ata_host_alloc(dev, 1);
61 if (!lda->host)
62 return -ENOMEM;
63
64 /* remap drive's physical memory address */
65 mem = devm_platform_ioremap_resource(pdev, 0);
66 if (IS_ERR(mem))
67 return PTR_ERR(mem);
68
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);
77 }
78
79 /* Assert reset to reset the drive */
80 gpiod_set_value(lda->reset, 1);
81 msleep(30);
82 gpiod_set_value(lda->reset, 0);
83 msleep(30);
84
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;
90
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;
95
96 /* start the port */
97 ata_sff_std_ports(&ap->ioaddr);
98
99 /* activate host */
100 ret = ata_host_activate(lda->host, 0, NULL, IRQF_TRIGGER_RISING,
101 &palmld_sht);
102 /* power down on failure */
103 if (ret) {
104 gpiod_set_value(lda->power, 0);
105 return ret;
106 }
107
108 platform_set_drvdata(pdev, lda);
109 return 0;
110}
111
112static int palmld_pata_remove(struct platform_device *pdev)
113{
114 struct palmld_pata *lda = platform_get_drvdata(pdev);
115
116 ata_platform_remove_one(pdev);
117
118 /* power down the HDD */
119 gpiod_set_value(lda->power, 0);
120
121 return 0;
122}
123
124static struct platform_driver palmld_pata_platform_driver = {
125 .driver = {
126 .name = DRV_NAME,
127 },
128 .probe = palmld_pata_probe,
129 .remove = palmld_pata_remove,
130};
131
132module_platform_driver(palmld_pata_platform_driver);
133
134MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
135MODULE_DESCRIPTION("PalmLD PATA driver");
136MODULE_LICENSE("GPL");
137MODULE_ALIAS("platform:" DRV_NAME);