Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
5a9d2515 MV |
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> | |
5a9d2515 MV |
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> | |
f43e4b00 | 25 | #include <linux/gpio/consumer.h> |
5a9d2515 MV |
26 | |
27 | #include <scsi/scsi_host.h> | |
28 | #include <mach/palmld.h> | |
29 | ||
30 | #define DRV_NAME "pata_palmld" | |
31 | ||
614c61a6 LW |
32 | struct palmld_pata { |
33 | struct ata_host *host; | |
34 | struct gpio_desc *power; | |
35 | struct gpio_desc *reset; | |
36 | }; | |
6b1e3fca | 37 | |
5a9d2515 MV |
38 | static struct scsi_host_template palmld_sht = { |
39 | ATA_PIO_SHT(DRV_NAME), | |
40 | }; | |
41 | ||
42 | static struct ata_port_operations palmld_port_ops = { | |
43 | .inherits = &ata_sff_port_ops, | |
23ebda2f | 44 | .sff_data_xfer = ata_sff_data_xfer32, |
5a9d2515 MV |
45 | .cable_detect = ata_cable_40wire, |
46 | }; | |
47 | ||
0ec24914 | 48 | static int palmld_pata_probe(struct platform_device *pdev) |
5a9d2515 | 49 | { |
614c61a6 | 50 | struct palmld_pata *lda; |
5a9d2515 MV |
51 | struct ata_port *ap; |
52 | void __iomem *mem; | |
f43e4b00 | 53 | struct device *dev = &pdev->dev; |
5a9d2515 MV |
54 | int ret; |
55 | ||
614c61a6 LW |
56 | lda = devm_kzalloc(dev, sizeof(*lda), GFP_KERNEL); |
57 | if (!lda) | |
58 | return -ENOMEM; | |
59 | ||
5a9d2515 | 60 | /* allocate host */ |
614c61a6 LW |
61 | lda->host = ata_host_alloc(dev, 1); |
62 | if (!lda->host) | |
f43e4b00 | 63 | return -ENOMEM; |
5a9d2515 MV |
64 | |
65 | /* remap drive's physical memory address */ | |
f43e4b00 LW |
66 | mem = devm_ioremap(dev, PALMLD_IDE_PHYS, 0x1000); |
67 | if (!mem) | |
68 | return -ENOMEM; | |
69 | ||
70 | /* request and activate power and reset GPIOs */ | |
614c61a6 LW |
71 | lda->power = devm_gpiod_get(dev, "power", GPIOD_OUT_HIGH); |
72 | if (IS_ERR(lda->power)) | |
73 | return PTR_ERR(lda->power); | |
74 | lda->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); | |
75 | if (IS_ERR(lda->reset)) { | |
76 | gpiod_set_value(lda->power, 0); | |
77 | return PTR_ERR(lda->reset); | |
6b1e3fca | 78 | } |
5a9d2515 | 79 | |
f43e4b00 | 80 | /* Assert reset to reset the drive */ |
614c61a6 | 81 | gpiod_set_value(lda->reset, 1); |
5a9d2515 | 82 | msleep(30); |
614c61a6 | 83 | gpiod_set_value(lda->reset, 0); |
5a9d2515 MV |
84 | msleep(30); |
85 | ||
86 | /* setup the ata port */ | |
614c61a6 | 87 | ap = lda->host->ports[0]; |
5a9d2515 MV |
88 | ap->ops = &palmld_port_ops; |
89 | ap->pio_mask = ATA_PIO4; | |
9cbe056f | 90 | ap->flags |= ATA_FLAG_PIO_POLLING; |
5a9d2515 MV |
91 | |
92 | /* memory mapping voodoo */ | |
93 | ap->ioaddr.cmd_addr = mem + 0x10; | |
94 | ap->ioaddr.altstatus_addr = mem + 0xe; | |
95 | ap->ioaddr.ctl_addr = mem + 0xe; | |
96 | ||
97 | /* start the port */ | |
98 | ata_sff_std_ports(&ap->ioaddr); | |
99 | ||
100 | /* activate host */ | |
614c61a6 LW |
101 | ret = ata_host_activate(lda->host, 0, NULL, IRQF_TRIGGER_RISING, |
102 | &palmld_sht); | |
f43e4b00 | 103 | /* power down on failure */ |
614c61a6 LW |
104 | if (ret) { |
105 | gpiod_set_value(lda->power, 0); | |
106 | return ret; | |
107 | } | |
108 | ||
109 | platform_set_drvdata(pdev, lda); | |
110 | return 0; | |
5a9d2515 MV |
111 | } |
112 | ||
614c61a6 | 113 | static int palmld_pata_remove(struct platform_device *pdev) |
5a9d2515 | 114 | { |
614c61a6 LW |
115 | struct palmld_pata *lda = platform_get_drvdata(pdev); |
116 | ||
117 | ata_platform_remove_one(pdev); | |
5a9d2515 MV |
118 | |
119 | /* power down the HDD */ | |
614c61a6 | 120 | gpiod_set_value(lda->power, 0); |
5a9d2515 MV |
121 | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static struct platform_driver palmld_pata_platform_driver = { | |
126 | .driver = { | |
127 | .name = DRV_NAME, | |
5a9d2515 MV |
128 | }, |
129 | .probe = palmld_pata_probe, | |
0ec24914 | 130 | .remove = palmld_pata_remove, |
5a9d2515 MV |
131 | }; |
132 | ||
99c8ea3e | 133 | module_platform_driver(palmld_pata_platform_driver); |
5a9d2515 MV |
134 | |
135 | MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); | |
136 | MODULE_DESCRIPTION("PalmLD PATA driver"); | |
137 | MODULE_LICENSE("GPL"); | |
138 | MODULE_ALIAS("platform:" DRV_NAME); |