Fixed MTP to work with TWRP

drivers/ata/pata_marvell.c

@@ -0,0 +1,186 @@
+/*
+ *	Marvell PATA driver.
+ *
+ *	For the moment we drive the PATA port in legacy mode. That
+ *	isn't making full use of the device functionality but it is
+ *	easy to get working.
+ *
+ *	(c) 2006 Red Hat
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/ata.h>
+
+#define DRV_NAME	"pata_marvell"
+#define DRV_VERSION	"0.1.6"
+
+/**
+ *	marvell_pata_active	-	check if PATA is active
+ *	@pdev: PCI device
+ *
+ *	Returns 1 if the PATA port may be active. We know how to check this
+ *	for the 6145 but not the other devices
+ */
+
+static int marvell_pata_active(struct pci_dev *pdev)
+{
+	int i;
+	u32 devices;
+	void __iomem *barp;
+
+	/* We don't yet know how to do this for other devices */
+	if (pdev->device != 0x6145)
+		return 1;
+
+	barp = pci_iomap(pdev, 5, 0x10);
+	if (barp == NULL)
+		return -ENOMEM;
+
+	printk("BAR5:");
+	for(i = 0; i <= 0x0F; i++)
+		printk("%02X:%02X ", i, ioread8(barp + i));
+	printk("\n");
+
+	devices = ioread32(barp + 0x0C);
+	pci_iounmap(pdev, barp);
+
+	if (devices & 0x10)
+		return 1;
+	return 0;
+}
+
+/**
+ *	marvell_pre_reset	-	probe begin
+ *	@link: link
+ *	@deadline: deadline jiffies for the operation
+ *
+ *	Perform the PATA port setup we need.
+ */
+
+static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
+{
+	struct ata_port *ap = link->ap;
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+
+	if (pdev->device == 0x6145 && ap->port_no == 0 &&
+		!marvell_pata_active(pdev))	/* PATA enable ? */
+			return -ENOENT;
+
+	return ata_sff_prereset(link, deadline);
+}
+
+static int marvell_cable_detect(struct ata_port *ap)
+{
+	/* Cable type */
+	switch(ap->port_no)
+	{
+	case 0:
+		if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1)
+			return ATA_CBL_PATA40;
+		return ATA_CBL_PATA80;
+	case 1: /* Legacy SATA port */
+		return ATA_CBL_SATA;
+	}
+
+	BUG();
+	return 0;	/* Our BUG macro needs the right markup */
+}
+
+/* No PIO or DMA methods needed for this device */
+
+static struct scsi_host_template marvell_sht = {
+	ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations marvell_ops = {
+	.inherits		= &ata_bmdma_port_ops,
+	.cable_detect		= marvell_cable_detect,
+	.prereset		= marvell_pre_reset,
+};
+
+
+/**
+ *	marvell_init_one - Register Marvell ATA PCI device with kernel services
+ *	@pdev: PCI device to register
+ *	@ent: Entry in marvell_pci_tbl matching with @pdev
+ *
+ *	Called from kernel PCI layer.
+ *
+ *	LOCKING:
+ *	Inherited from PCI layer (may sleep).
+ *
+ *	RETURNS:
+ *	Zero on success, or -ERRNO value.
+ */
+
+static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	static const struct ata_port_info info = {
+		.flags		= ATA_FLAG_SLAVE_POSS,
+
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask 	= ATA_UDMA5,
+
+		.port_ops	= &marvell_ops,
+	};
+	static const struct ata_port_info info_sata = {
+		/* Slave possible as its magically mapped not real */
+		.flags		= ATA_FLAG_SLAVE_POSS,
+
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask 	= ATA_UDMA6,
+
+		.port_ops	= &marvell_ops,
+	};
+	const struct ata_port_info *ppi[] = { &info, &info_sata };
+
+	if (pdev->device == 0x6101)
+		ppi[1] = &ata_dummy_port_info;
+
+#if defined(CONFIG_SATA_AHCI) || defined(CONFIG_SATA_AHCI_MODULE)
+	if (!marvell_pata_active(pdev)) {
+		printk(KERN_INFO DRV_NAME ": PATA port not active, deferring to AHCI driver.\n");
+		return -ENODEV;
+	}
+#endif
+	return ata_pci_bmdma_init_one(pdev, ppi, &marvell_sht, NULL, 0);
+}
+
+static const struct pci_device_id marvell_pci_tbl[] = {
+	{ PCI_DEVICE(0x11AB, 0x6101), },
+	{ PCI_DEVICE(0x11AB, 0x6121), },
+	{ PCI_DEVICE(0x11AB, 0x6123), },
+	{ PCI_DEVICE(0x11AB, 0x6145), },
+	{ PCI_DEVICE(0x1B4B, 0x91A0), },
+	{ PCI_DEVICE(0x1B4B, 0x91A4), },
+
+	{ }	/* terminate list */
+};
+
+static struct pci_driver marvell_pci_driver = {
+	.name			= DRV_NAME,
+	.id_table		= marvell_pci_tbl,
+	.probe			= marvell_init_one,
+	.remove			= ata_pci_remove_one,
+#ifdef CONFIG_PM_SLEEP
+	.suspend		= ata_pci_device_suspend,
+	.resume			= ata_pci_device_resume,
+#endif
+};
+
+module_pci_driver(marvell_pci_driver);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);
+MODULE_VERSION(DRV_VERSION);