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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /drivers/ata/pata_palmld.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/ata/pata_palmld.c')
-rw-r--r-- | drivers/ata/pata_palmld.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/ata/pata_palmld.c b/drivers/ata/pata_palmld.c new file mode 100644 index 000000000..244844157 --- /dev/null +++ b/drivers/ata/pata_palmld.c @@ -0,0 +1,138 @@ +// 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> +#include <mach/palmld.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_ioremap(dev, PALMLD_IDE_PHYS, 0x1000); + if (!mem) + return -ENOMEM; + + /* 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); |