[libata] Add a bunch of PATA drivers.
The vast majority of drivers and changes are from Alan Cox. Albert Lee
contributed and maintains pata_pdc2027x. Adrian Bunk, Andrew Morton,
and Tejun Heo contributed various minor fixes and updates.
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
new file mode 100644
index 0000000..0328461
--- /dev/null
+++ b/drivers/ata/pata_cmd64x.c
@@ -0,0 +1,505 @@
+/*
+ * pata_cmd64x.c - ATI PATA for new ATA layer
+ * (C) 2005 Red Hat Inc
+ * Alan Cox <alan@redhat.com>
+ *
+ * Based upon
+ * linux/drivers/ide/pci/cmd64x.c Version 1.30 Sept 10, 2002
+ *
+ * cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
+ * Note, this driver is not used at all on other systems because
+ * there the "BIOS" has done all of the following already.
+ * Due to massive hardware bugs, UltraDMA is only supported
+ * on the 646U2 and not on the 646U.
+ *
+ * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
+ * Copyright (C) 1998 David S. Miller (davem@redhat.com)
+ *
+ * Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
+ *
+ * TODO
+ * Testing work
+ */
+
+#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_cmd64x"
+#define DRV_VERSION "0.2.1"
+
+/*
+ * CMD64x specific registers definition.
+ */
+
+enum {
+ CFR = 0x50,
+ CFR_INTR_CH0 = 0x02,
+ CNTRL = 0x51,
+ CNTRL_DIS_RA0 = 0x40,
+ CNTRL_DIS_RA1 = 0x80,
+ CNTRL_ENA_2ND = 0x08,
+ CMDTIM = 0x52,
+ ARTTIM0 = 0x53,
+ DRWTIM0 = 0x54,
+ ARTTIM1 = 0x55,
+ DRWTIM1 = 0x56,
+ ARTTIM23 = 0x57,
+ ARTTIM23_DIS_RA2 = 0x04,
+ ARTTIM23_DIS_RA3 = 0x08,
+ ARTTIM23_INTR_CH1 = 0x10,
+ ARTTIM2 = 0x57,
+ ARTTIM3 = 0x57,
+ DRWTIM23 = 0x58,
+ DRWTIM2 = 0x58,
+ BRST = 0x59,
+ DRWTIM3 = 0x5b,
+ BMIDECR0 = 0x70,
+ MRDMODE = 0x71,
+ MRDMODE_INTR_CH0 = 0x04,
+ MRDMODE_INTR_CH1 = 0x08,
+ MRDMODE_BLK_CH0 = 0x10,
+ MRDMODE_BLK_CH1 = 0x20,
+ BMIDESR0 = 0x72,
+ UDIDETCR0 = 0x73,
+ DTPR0 = 0x74,
+ BMIDECR1 = 0x78,
+ BMIDECSR = 0x79,
+ BMIDESR1 = 0x7A,
+ UDIDETCR1 = 0x7B,
+ DTPR1 = 0x7C
+};
+
+static int cmd64x_pre_reset(struct ata_port *ap)
+{
+ ap->cbl = ATA_CBL_PATA40;
+ return ata_std_prereset(ap);
+}
+
+static int cmd648_pre_reset(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ u8 r;
+
+ /* Check cable detect bits */
+ pci_read_config_byte(pdev, BMIDECSR, &r);
+ if (r & (1 << ap->port_no))
+ ap->cbl = ATA_CBL_PATA80;
+ else
+ ap->cbl = ATA_CBL_PATA40;
+
+ return ata_std_prereset(ap);
+}
+
+static void cmd64x_error_handler(struct ata_port *ap)
+{
+ return ata_bmdma_drive_eh(ap, cmd64x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+static void cmd648_error_handler(struct ata_port *ap)
+{
+ ata_bmdma_drive_eh(ap, cmd648_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ * cmd64x_set_piomode - set initial PIO mode data
+ * @ap: ATA interface
+ * @adev: ATA device
+ *
+ * Called to do the PIO mode setup.
+ */
+
+static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ struct ata_timing t;
+ const unsigned long T = 1000000 / 33;
+ const u8 setup_data[] = { 0x40, 0x40, 0x40, 0x80, 0x00 };
+
+ u8 reg;
+
+ /* Port layout is not logical so use a table */
+ const u8 arttim_port[2][2] = {
+ { ARTTIM0, ARTTIM1 },
+ { ARTTIM23, ARTTIM23 }
+ };
+ const u8 drwtim_port[2][2] = {
+ { DRWTIM0, DRWTIM1 },
+ { DRWTIM2, DRWTIM3 }
+ };
+
+ int arttim = arttim_port[ap->port_no][adev->devno];
+ int drwtim = drwtim_port[ap->port_no][adev->devno];
+
+
+ if (ata_timing_compute(adev, adev->pio_mode, &t, T, 0) < 0) {
+ printk(KERN_ERR DRV_NAME ": mode computation failed.\n");
+ return;
+ }
+ if (ap->port_no) {
+ /* Slave has shared address setup */
+ struct ata_device *pair = ata_dev_pair(adev);
+
+ if (pair) {
+ struct ata_timing tp;
+ ata_timing_compute(pair, pair->pio_mode, &tp, T, 0);
+ ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
+ }
+ }
+
+ printk(KERN_DEBUG DRV_NAME ": active %d recovery %d setup %d.\n",
+ t.active, t.recover, t.setup);
+ if (t.recover > 16) {
+ t.active += t.recover - 16;
+ t.recover = 16;
+ }
+ if (t.active > 16)
+ t.active = 16;
+
+ /* Now convert the clocks into values we can actually stuff into
+ the chip */
+
+ if (t.recover > 1)
+ t.recover--;
+ else
+ t.recover = 15;
+
+ if (t.setup > 4)
+ t.setup = 0xC0;
+ else
+ t.setup = setup_data[t.setup];
+
+ t.active &= 0x0F; /* 0 = 16 */
+
+ /* Load setup timing */
+ pci_read_config_byte(pdev, arttim, ®);
+ reg &= 0x3F;
+ reg |= t.setup;
+ pci_write_config_byte(pdev, arttim, reg);
+
+ /* Load active/recovery */
+ pci_write_config_byte(pdev, drwtim, (t.active << 4) | t.recover);
+}
+
+/**
+ * cmd64x_set_dmamode - set initial DMA mode data
+ * @ap: ATA interface
+ * @adev: ATA device
+ *
+ * Called to do the DMA mode setup.
+ */
+
+static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+ static const u8 udma_data[] = {
+ 0x31, 0x21, 0x11, 0x25, 0x15, 0x05
+ };
+ static const u8 mwdma_data[] = {
+ 0x30, 0x20, 0x10
+ };
+
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ u8 regU, regD;
+
+ int pciU = UDIDETCR0 + 8 * ap->port_no;
+ int pciD = BMIDESR0 + 8 * ap->port_no;
+ int shift = 2 * adev->devno;
+
+ pci_read_config_byte(pdev, pciD, ®D);
+ pci_read_config_byte(pdev, pciU, ®U);
+
+ regD &= ~(0x20 << shift);
+ regU &= ~(0x35 << shift);
+
+ if (adev->dma_mode >= XFER_UDMA_0)
+ regU |= udma_data[adev->dma_mode - XFER_UDMA_0] << shift;
+ else
+ regD |= mwdma_data[adev->dma_mode - XFER_MW_DMA_0] << shift;
+
+ regD |= 0x20 << adev->devno;
+
+ pci_write_config_byte(pdev, pciU, regU);
+ pci_write_config_byte(pdev, pciD, regD);
+}
+
+/**
+ * cmd648_dma_stop - DMA stop callback
+ * @qc: Command in progress
+ *
+ * DMA has completed.
+ */
+
+static void cmd648_bmdma_stop(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ u8 dma_intr;
+ int dma_reg = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
+ int dma_mask = ap->port_no ? ARTTIM2 : CFR;
+
+ ata_bmdma_stop(qc);
+
+ pci_read_config_byte(pdev, dma_reg, &dma_intr);
+ pci_write_config_byte(pdev, dma_reg, dma_intr | dma_mask);
+}
+
+/**
+ * cmd646r1_dma_stop - DMA stop callback
+ * @qc: Command in progress
+ *
+ * Stub for now while investigating the r1 quirk in the old driver.
+ */
+
+static void cmd646r1_bmdma_stop(struct ata_queued_cmd *qc)
+{
+ ata_bmdma_stop(qc);
+}
+
+static struct scsi_host_template cmd64x_sht = {
+ .module = THIS_MODULE,
+ .name = DRV_NAME,
+ .ioctl = ata_scsi_ioctl,
+ .queuecommand = ata_scsi_queuecmd,
+ .can_queue = ATA_DEF_QUEUE,
+ .this_id = ATA_SHT_THIS_ID,
+ .sg_tablesize = LIBATA_MAX_PRD,
+ .max_sectors = ATA_MAX_SECTORS,
+ .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
+ .emulated = ATA_SHT_EMULATED,
+ .use_clustering = ATA_SHT_USE_CLUSTERING,
+ .proc_name = DRV_NAME,
+ .dma_boundary = ATA_DMA_BOUNDARY,
+ .slave_configure = ata_scsi_slave_config,
+ .bios_param = ata_std_bios_param,
+};
+
+static struct ata_port_operations cmd64x_port_ops = {
+ .port_disable = ata_port_disable,
+ .set_piomode = cmd64x_set_piomode,
+ .set_dmamode = cmd64x_set_dmamode,
+ .mode_filter = ata_pci_default_filter,
+ .tf_load = ata_tf_load,
+ .tf_read = ata_tf_read,
+ .check_status = ata_check_status,
+ .exec_command = ata_exec_command,
+ .dev_select = ata_std_dev_select,
+
+ .freeze = ata_bmdma_freeze,
+ .thaw = ata_bmdma_thaw,
+ .error_handler = cmd64x_error_handler,
+ .post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+ .bmdma_setup = ata_bmdma_setup,
+ .bmdma_start = ata_bmdma_start,
+ .bmdma_stop = ata_bmdma_stop,
+ .bmdma_status = ata_bmdma_status,
+
+ .qc_prep = ata_qc_prep,
+ .qc_issue = ata_qc_issue_prot,
+ .eng_timeout = ata_eng_timeout,
+ .data_xfer = ata_pio_data_xfer,
+
+ .irq_handler = ata_interrupt,
+ .irq_clear = ata_bmdma_irq_clear,
+
+ .port_start = ata_port_start,
+ .port_stop = ata_port_stop,
+ .host_stop = ata_host_stop
+};
+
+static struct ata_port_operations cmd646r1_port_ops = {
+ .port_disable = ata_port_disable,
+ .set_piomode = cmd64x_set_piomode,
+ .set_dmamode = cmd64x_set_dmamode,
+ .mode_filter = ata_pci_default_filter,
+ .tf_load = ata_tf_load,
+ .tf_read = ata_tf_read,
+ .check_status = ata_check_status,
+ .exec_command = ata_exec_command,
+ .dev_select = ata_std_dev_select,
+
+ .freeze = ata_bmdma_freeze,
+ .thaw = ata_bmdma_thaw,
+ .error_handler = cmd64x_error_handler,
+ .post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+ .bmdma_setup = ata_bmdma_setup,
+ .bmdma_start = ata_bmdma_start,
+ .bmdma_stop = cmd646r1_bmdma_stop,
+ .bmdma_status = ata_bmdma_status,
+
+ .qc_prep = ata_qc_prep,
+ .qc_issue = ata_qc_issue_prot,
+ .eng_timeout = ata_eng_timeout,
+ .data_xfer = ata_pio_data_xfer,
+
+ .irq_handler = ata_interrupt,
+ .irq_clear = ata_bmdma_irq_clear,
+
+ .port_start = ata_port_start,
+ .port_stop = ata_port_stop,
+ .host_stop = ata_host_stop
+};
+
+static struct ata_port_operations cmd648_port_ops = {
+ .port_disable = ata_port_disable,
+ .set_piomode = cmd64x_set_piomode,
+ .set_dmamode = cmd64x_set_dmamode,
+ .mode_filter = ata_pci_default_filter,
+ .tf_load = ata_tf_load,
+ .tf_read = ata_tf_read,
+ .check_status = ata_check_status,
+ .exec_command = ata_exec_command,
+ .dev_select = ata_std_dev_select,
+
+ .freeze = ata_bmdma_freeze,
+ .thaw = ata_bmdma_thaw,
+ .error_handler = cmd648_error_handler,
+ .post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+ .bmdma_setup = ata_bmdma_setup,
+ .bmdma_start = ata_bmdma_start,
+ .bmdma_stop = cmd648_bmdma_stop,
+ .bmdma_status = ata_bmdma_status,
+
+ .qc_prep = ata_qc_prep,
+ .qc_issue = ata_qc_issue_prot,
+ .eng_timeout = ata_eng_timeout,
+ .data_xfer = ata_pio_data_xfer,
+
+ .irq_handler = ata_interrupt,
+ .irq_clear = ata_bmdma_irq_clear,
+
+ .port_start = ata_port_start,
+ .port_stop = ata_port_stop,
+ .host_stop = ata_host_stop
+};
+
+static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ u32 class_rev;
+
+ static struct ata_port_info cmd_info[6] = {
+ { /* CMD 643 - no UDMA */
+ .sht = &cmd64x_sht,
+ .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .port_ops = &cmd64x_port_ops
+ },
+ { /* CMD 646 with broken UDMA */
+ .sht = &cmd64x_sht,
+ .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .port_ops = &cmd64x_port_ops
+ },
+ { /* CMD 646 with working UDMA */
+ .sht = &cmd64x_sht,
+ .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .udma_mask = ATA_UDMA1,
+ .port_ops = &cmd64x_port_ops
+ },
+ { /* CMD 646 rev 1 */
+ .sht = &cmd64x_sht,
+ .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .port_ops = &cmd646r1_port_ops
+ },
+ { /* CMD 648 */
+ .sht = &cmd64x_sht,
+ .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .udma_mask = ATA_UDMA2,
+ .port_ops = &cmd648_port_ops
+ },
+ { /* CMD 649 */
+ .sht = &cmd64x_sht,
+ .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .udma_mask = ATA_UDMA3,
+ .port_ops = &cmd648_port_ops
+ }
+ };
+ static struct ata_port_info *port_info[2], *info;
+ u8 mrdmode;
+
+ info = &cmd_info[id->driver_data];
+
+ pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
+ class_rev &= 0xFF;
+
+ if (id->driver_data == 0) /* 643 */
+ ata_pci_clear_simplex(pdev);
+
+ if (pdev->device == PCI_DEVICE_ID_CMD_646) {
+ /* Does UDMA work ? */
+ if (class_rev > 4)
+ info = &cmd_info[2];
+ /* Early rev with other problems ? */
+ else if (class_rev == 1)
+ info = &cmd_info[3];
+ }
+
+ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
+ pci_read_config_byte(pdev, MRDMODE, &mrdmode);
+ mrdmode &= ~ 0x30; /* IRQ set up */
+ mrdmode |= 0x02; /* Memory read line enable */
+ pci_write_config_byte(pdev, MRDMODE, mrdmode);
+
+ /* Force PIO 0 here.. */
+
+ /* PPC specific fixup copied from old driver */
+#ifdef CONFIG_PPC
+ pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
+#endif
+
+ port_info[0] = port_info[1] = info;
+ return ata_pci_init_one(pdev, port_info, 2);
+}
+
+static struct pci_device_id cmd64x[] = {
+ { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_643, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_646, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
+ { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_648, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
+ { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_649, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5},
+ { 0, },
+};
+
+static struct pci_driver cmd64x_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = cmd64x,
+ .probe = cmd64x_init_one,
+ .remove = ata_pci_remove_one
+};
+
+static int __init cmd64x_init(void)
+{
+ return pci_register_driver(&cmd64x_pci_driver);
+}
+
+
+static void __exit cmd64x_exit(void)
+{
+ pci_unregister_driver(&cmd64x_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for CMD64x series PATA controllers");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, cmd64x);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(cmd64x_init);
+module_exit(cmd64x_exit);