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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/ata/pata_palmld.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
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.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/ata/pata_palmld.c b/drivers/ata/pata_palmld.c
new file mode 100644
index 000000000..51caa2a42
--- /dev/null
+++ b/drivers/ata/pata_palmld.c
@@ -0,0 +1,137 @@
+// 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);