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