Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 286 insertions, 0 deletions

diff --git a/drivers/scsi/sata_sis.c b/drivers/scsi/sata_sis.c
new file mode 100644
index 000000000000..5105ddd08447
--- /dev/null
+++ b/drivers/scsi/sata_sis.c
@@ -0,0 +1,286 @@
+/*
+ *  sata_sis.c - Silicon Integrated Systems SATA
+ *
+ *  Maintained by:  Uwe Koziolek
+ *  		    Please ALWAYS copy linux-ide@vger.kernel.org
+ *		    on emails.
+ *
+ *  Copyright 2004 Uwe Koziolek
+ *
+ *  The contents of this file are subject to the Open
+ *  Software License version 1.1 that can be found at
+ *  http://www.opensource.org/licenses/osl-1.1.txt and is included herein
+ *  by reference.
+ *
+ *  Alternatively, the contents of this file may be used under the terms
+ *  of the GNU General Public License version 2 (the "GPL") as distributed
+ *  in the kernel source COPYING file, in which case the provisions of
+ *  the GPL are applicable instead of the above.  If you wish to allow
+ *  the use of your version of this file only under the terms of the
+ *  GPL and not to allow others to use your version of this file under
+ *  the OSL, indicate your decision by deleting the provisions above and
+ *  replace them with the notice and other provisions required by the GPL.
+ *  If you do not delete the provisions above, a recipient may use your
+ *  version of this file under either the OSL or the GPL.
+ *
+ */
+
+#include <linux/config.h>
+#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 <linux/interrupt.h>
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+
+#define DRV_NAME	"sata_sis"
+#define DRV_VERSION	"0.5"
+
+enum {
+	sis_180			= 0,
+	SIS_SCR_PCI_BAR		= 5,
+
+	/* PCI configuration registers */
+	SIS_GENCTL		= 0x54, /* IDE General Control register */
+	SIS_SCR_BASE		= 0xc0, /* sata0 phy SCR registers */
+	SIS_SATA1_OFS		= 0x10, /* offset from sata0->sata1 phy regs */
+
+	/* random bits */
+	SIS_FLAG_CFGSCR		= (1 << 30), /* host flag: SCRs via PCI cfg */
+
+	GENCTL_IOMAPPED_SCR	= (1 << 26), /* if set, SCRs are in IO space */
+};
+
+static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
+static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg);
+static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+
+static struct pci_device_id sis_pci_tbl[] = {
+	{ PCI_VENDOR_ID_SI, 0x180, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
+	{ PCI_VENDOR_ID_SI, 0x181, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
+	{ }	/* terminate list */
+};
+
+
+static struct pci_driver sis_pci_driver = {
+	.name			= DRV_NAME,
+	.id_table		= sis_pci_tbl,
+	.probe			= sis_init_one,
+	.remove			= ata_pci_remove_one,
+};
+
+static Scsi_Host_Template sis_sht = {
+	.module			= THIS_MODULE,
+	.name			= DRV_NAME,
+	.ioctl			= ata_scsi_ioctl,
+	.queuecommand		= ata_scsi_queuecmd,
+	.eh_strategy_handler	= ata_scsi_error,
+	.can_queue		= ATA_DEF_QUEUE,
+	.this_id		= ATA_SHT_THIS_ID,
+	.sg_tablesize		= ATA_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,
+	.ordered_flush		= 1,
+};
+
+static struct ata_port_operations sis_ops = {
+	.port_disable		= ata_port_disable,
+	.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,
+	.phy_reset		= sata_phy_reset,
+	.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,
+	.irq_handler		= ata_interrupt,
+	.irq_clear		= ata_bmdma_irq_clear,
+	.scr_read		= sis_scr_read,
+	.scr_write		= sis_scr_write,
+	.port_start		= ata_port_start,
+	.port_stop		= ata_port_stop,
+};
+
+static struct ata_port_info sis_port_info = {
+	.sht		= &sis_sht,
+	.host_flags	= ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
+			  ATA_FLAG_NO_LEGACY,
+	.pio_mask	= 0x1f,
+	.mwdma_mask	= 0x7,
+	.udma_mask	= 0x7f,
+	.port_ops	= &sis_ops,
+};
+
+
+MODULE_AUTHOR("Uwe Koziolek");
+MODULE_DESCRIPTION("low-level driver for Silicon Integratad Systems SATA controller");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+
+static unsigned int get_scr_cfg_addr(unsigned int port_no, unsigned int sc_reg)
+{
+	unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
+
+	if (port_no)
+		addr += SIS_SATA1_OFS;
+	return addr;
+}
+
+static u32 sis_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
+	unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, sc_reg);
+	u32 val;
+
+	if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
+		return 0xffffffff;
+	pci_read_config_dword(pdev, cfg_addr, &val);
+	return val;
+}
+
+static void sis_scr_cfg_write (struct ata_port *ap, unsigned int scr, u32 val)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
+	unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, scr);
+
+	if (scr == SCR_ERROR) /* doesn't exist in PCI cfg space */
+		return;
+	pci_write_config_dword(pdev, cfg_addr, val);
+}
+
+static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg)
+{
+	if (sc_reg > SCR_CONTROL)
+		return 0xffffffffU;
+
+	if (ap->flags & SIS_FLAG_CFGSCR)
+		return sis_scr_cfg_read(ap, sc_reg);
+	return inl(ap->ioaddr.scr_addr + (sc_reg * 4));
+}
+
+static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
+{
+	if (sc_reg > SCR_CONTROL)
+		return;
+
+	if (ap->flags & SIS_FLAG_CFGSCR)
+		sis_scr_cfg_write(ap, sc_reg, val);
+	else
+		outl(val, ap->ioaddr.scr_addr + (sc_reg * 4));
+}
+
+/* move to PCI layer, integrate w/ MSI stuff */
+static void pci_enable_intx(struct pci_dev *pdev)
+{
+	u16 pci_command;
+
+	pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
+	if (pci_command & PCI_COMMAND_INTX_DISABLE) {
+		pci_command &= ~PCI_COMMAND_INTX_DISABLE;
+		pci_write_config_word(pdev, PCI_COMMAND, pci_command);
+	}
+}
+
+static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct ata_probe_ent *probe_ent = NULL;
+	int rc;
+	u32 genctl;
+	struct ata_port_info *ppi;
+	int pci_dev_busy = 0;
+
+	rc = pci_enable_device(pdev);
+	if (rc)
+		return rc;
+
+	rc = pci_request_regions(pdev, DRV_NAME);
+	if (rc) {
+		pci_dev_busy = 1;
+		goto err_out;
+	}
+
+	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
+	if (rc)
+		goto err_out_regions;
+	rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
+	if (rc)
+		goto err_out_regions;
+
+	ppi = &sis_port_info;
+	probe_ent = ata_pci_init_native_mode(pdev, &ppi);
+	if (!probe_ent) {
+		rc = -ENOMEM;
+		goto err_out_regions;
+	}
+
+	/* check and see if the SCRs are in IO space or PCI cfg space */
+	pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
+	if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
+		probe_ent->host_flags |= SIS_FLAG_CFGSCR;
+	
+	/* if hardware thinks SCRs are in IO space, but there are
+	 * no IO resources assigned, change to PCI cfg space.
+	 */
+	if ((!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) &&
+	    ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) ||
+	     (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
+		genctl &= ~GENCTL_IOMAPPED_SCR;
+		pci_write_config_dword(pdev, SIS_GENCTL, genctl);
+		probe_ent->host_flags |= SIS_FLAG_CFGSCR;
+	}
+
+	if (!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) {
+		probe_ent->port[0].scr_addr =
+			pci_resource_start(pdev, SIS_SCR_PCI_BAR);
+		probe_ent->port[1].scr_addr =
+			pci_resource_start(pdev, SIS_SCR_PCI_BAR) + 64;
+	}
+
+	pci_set_master(pdev);
+	pci_enable_intx(pdev);
+
+	/* FIXME: check ata_device_add return value */
+	ata_device_add(probe_ent);
+	kfree(probe_ent);
+
+	return 0;
+
+err_out_regions:
+	pci_release_regions(pdev);
+
+err_out:
+	if (!pci_dev_busy)
+		pci_disable_device(pdev);
+	return rc;
+
+}
+
+static int __init sis_init(void)
+{
+	return pci_module_init(&sis_pci_driver);
+}
+
+static void __exit sis_exit(void)
+{
+	pci_unregister_driver(&sis_pci_driver);
+}
+
+module_init(sis_init);
+module_exit(sis_exit);
+