pata_piccolo: Driver for old Toshiba chipsets
We were never able to get docs for this out of Toshiba for years. Dave
Barnes produced a NetBSD driver however and from that we can fill in the
needed tables.
As we correct the PCI identifiers a bit also update the old ide generic driver
at the same time so it stays compiling.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/ata/pata_piccolo.c b/drivers/ata/pata_piccolo.c
new file mode 100644
index 0000000..bfe0180
--- /dev/null
+++ b/drivers/ata/pata_piccolo.c
@@ -0,0 +1,140 @@
+/*
+ * pata_piccolo.c - Toshiba Piccolo PATA/SATA controller driver.
+ *
+ * This is basically an update to ata_generic.c to add Toshiba Piccolo support
+ * then split out to keep ata_generic "clean".
+ *
+ * Copyright 2005 Red Hat Inc, all rights reserved.
+ *
+ * Elements from ide/pci/generic.c
+ * Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org>
+ * Portions (C) Copyright 2002 Red Hat Inc <alan@redhat.com>
+ *
+ * May be copied or modified under the terms of the GNU General Public License
+ *
+ * The timing data tables/programming info are courtesy of the NetBSD driver
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+
+#define DRV_NAME "pata_piccolo"
+#define DRV_VERSION "0.0.1"
+
+
+
+static void tosh_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ static const u16 pio[6] = { /* For reg 0x50 low word & E088 */
+ 0x0566, 0x0433, 0x0311, 0x0201, 0x0200, 0x0100
+ };
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ u16 conf;
+ pci_read_config_word(pdev, 0x50, &conf);
+ conf &= 0xE088;
+ conf |= pio[adev->pio_mode - XFER_PIO_0];
+ pci_write_config_word(pdev, 0x50, conf);
+}
+
+static void tosh_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ u32 conf;
+ pci_read_config_dword(pdev, 0x5C, &conf);
+ conf &= 0x78FFE088; /* Keep the other bits */
+ if (adev->dma_mode >= XFER_UDMA_0) {
+ int udma = adev->dma_mode - XFER_UDMA_0;
+ conf |= 0x80000000;
+ conf |= (udma + 2) << 28;
+ conf |= (2 - udma) * 0x111; /* spread into three nibbles */
+ } else {
+ static const u32 mwdma[4] = {
+ 0x0655, 0x0200, 0x0200, 0x0100
+ };
+ conf |= mwdma[adev->dma_mode - XFER_MW_DMA_0];
+ }
+ pci_write_config_dword(pdev, 0x5C, conf);
+}
+
+
+static struct scsi_host_template tosh_sht = {
+ ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations tosh_port_ops = {
+ .inherits = &ata_bmdma_port_ops,
+ .cable_detect = ata_cable_unknown,
+ .set_piomode = tosh_set_piomode,
+ .set_dmamode = tosh_set_dmamode
+};
+
+/**
+ * ata_tosh_init - attach generic IDE
+ * @dev: PCI device found
+ * @id: match entry
+ *
+ * Called each time a matching IDE interface is found. We check if the
+ * interface is one we wish to claim and if so we perform any chip
+ * specific hacks then let the ATA layer do the heavy lifting.
+ */
+
+static int ata_tosh_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ static const struct ata_port_info info = {
+ .flags = ATA_FLAG_SLAVE_POSS,
+ .pio_mask = ATA_PIO5,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA2,
+ .port_ops = &tosh_port_ops
+ };
+ const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
+ /* Just one port for the moment */
+ return ata_pci_sff_init_one(dev, ppi, &tosh_sht, NULL);
+}
+
+static struct pci_device_id ata_tosh[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
+ { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), },
+ { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3), },
+ { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5), },
+ { 0, },
+};
+
+static struct pci_driver ata_tosh_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = ata_tosh,
+ .probe = ata_tosh_init_one,
+ .remove = ata_pci_remove_one,
+#ifdef CONFIG_PM
+ .suspend = ata_pci_device_suspend,
+ .resume = ata_pci_device_resume,
+#endif
+};
+
+static int __init ata_tosh_init(void)
+{
+ return pci_register_driver(&ata_tosh_pci_driver);
+}
+
+
+static void __exit ata_tosh_exit(void)
+{
+ pci_unregister_driver(&ata_tosh_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, ata_tosh);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(ata_tosh_init);
+module_exit(ata_tosh_exit);
+