Staging: add phison ATA driver to the tree

It doesn't build properly yet as it is against an older kernel version.
That will be fixed up in patches following this.

From: Evan Ko <evan_ko@phison.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/phison/phison.c

+/*
+ * Copyright (C) 2006		Red Hat <evan_ko@phison.com>
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ *
+ *  [Modify History]
+ *   #0001, Evan, 2008.10.22, V0.00, New release.
+ *   #0002, Evan, 2008.11.01, V0.90, Test Work In Ubuntu Linux 8.04.
+ *   #0003, Evan, 2008.01.08, V0.91, Change Name "PCIE-SSD" to "E-BOX".
+ */
+
+#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/device.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/ata.h>
+
+#define PHISON_DEBUG
+
+#define DRV_NAME	"PHISON E-BOX" //#0003
+#define DRV_VERSION     "0.91" //#0003
+
+#define PCI_VENDOR_ID_PHISON   0x1987
+#define PCI_DEVICE_ID_PS5000   0x5000
+
+int phison_pre_reset(struct ata_link *link, unsigned long deadline)
+{
+	int ret;
+	struct ata_port *ap = link->ap;
+	ap->cbl = ATA_CBL_NONE;
+	ret = ata_std_prereset(link, deadline);
+	#ifdef PHISON_DEBUG
+	printk("****** phison_pre_reset(), ret = %x ******\n", ret);
+	#endif
+	return ret;
+}
+
+void phison_error_handler(struct ata_port *ap)
+{
+	#ifdef PHISON_DEBUG
+	printk("****** phison_error_handler() ******\n");
+	#endif
+	return ata_bmdma_drive_eh(ap, phison_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+struct scsi_host_template phison_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,
+	.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,
+	.slave_destroy	= ata_scsi_slave_destroy,
+	/* Use standard CHS mapping rules */
+	.bios_param		= ata_std_bios_param,
+};
+
+const struct ata_port_operations phison_ops = {
+	/* Task file is PCI ATA format, use helpers */
+	.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	= phison_error_handler,
+	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
+
+	/* BMDMA handling is PCI ATA format, use helpers */
+	.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,
+	.data_xfer		= ata_data_xfer,
+
+	/* IRQ-related hooks */
+	.irq_handler		= ata_interrupt,
+	.irq_clear		= ata_bmdma_irq_clear,
+	.irq_on			= ata_irq_on,
+
+	/* Generic PATA PCI ATA helpers */
+	.port_start		= ata_port_start,
+};
+
+int phison_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct ata_port_info info = {
+		.sht		= &phison_sht,
+		.flags	= ATA_FLAG_NO_ATAPI,
+
+		.pio_mask	= 0x1f,
+		.mwdma_mask	= 0x07,
+		.udma_mask 	= ATA_UDMA5,
+
+		.port_ops	= &phison_ops,
+	};
+	int ret;
+
+	const struct ata_port_info *ppi[] = { &info, NULL };
+
+	ret = ata_pci_init_one(pdev, ppi);
+
+	#ifdef PHISON_DEBUG
+	printk("****** phison_init_one(), ret = %x ******\n", ret);
+	#endif
+
+	return ret;
+
+}
+
+struct pci_device_id phison_pci_tbl[] = {
+	{ PCI_VENDOR_ID_PHISON, PCI_DEVICE_ID_PS5000, PCI_ANY_ID, PCI_ANY_ID,
+	  PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
+	{ 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, phison_pci_tbl);
+
+struct pci_driver phison_pci_driver = {
+	.name		= DRV_NAME,
+	.id_table	= phison_pci_tbl,
+	.probe		= phison_init_one,
+	.remove		= ata_pci_remove_one,
+#ifdef CONFIG_PM //haven't test it.
+	.suspend	= ata_pci_device_suspend,
+	.resume		= ata_pci_device_resume,
+#endif
+};
+
+int phison_ide_init(void)
+{
+#if 0 //For Test.
+	struct pci_dev *pci_dev = NULL;
+	struct pci_dev *ps5k_dev = NULL;
+	int i, ret;
+	u16 vid, pid;
+	u32 addr1,addr2,addr3, addr4,addr5,addr6;
+
+	printk("****** phison_ide_init ******\n");
+
+	i = 0;
+
+	while(1)
+	{
+		pci_dev = pci_find_device(PCI_ANY_ID,PCI_ANY_ID, pci_dev);
+
+		if(pci_dev!=NULL)
+		{
+			pci_read_config_word(pci_dev, 0, &pid);
+			pci_read_config_word(pci_dev, 2, &vid);
+			pci_read_config_dword(pci_dev, 16, &addr1);
+			pci_read_config_dword(pci_dev, 16, &addr1);
+			pci_read_config_dword(pci_dev, 16, &addr1);
+			pci_read_config_dword(pci_dev, 16, &addr1);
+			pci_read_config_dword(pci_dev, 20, &addr2);
+			pci_read_config_dword(pci_dev, 24, &addr3);
+			pci_read_config_dword(pci_dev, 28, &addr4);
+			pci_read_config_dword(pci_dev, 32, &addr5);
+			pci_read_config_dword(pci_dev, 36, &addr6);
+
+			printk("****** <0x%02x>, %x, %x, %x,%x,%x,%x,%x,%x ******\n", i, pid, vid, addr1, addr2, addr3, addr4,addr5,addr6);
+			i++;
+
+			if((pid==PCI_VENDOR_ID_PHISON)&&(vid==PCI_DEVICE_ID_PS5000)) ps5k_dev = pci_dev;
+		}
+		else
+		{
+			if(i==0) printk("****** no pci device found ******\n");
+			break;
+		}
+	}
+
+	if(ps5k_dev!=NULL)
+	{
+		ret = pci_register_driver(&phison_pci_driver);
+		printk("****** PS5000 found, Ret = %x ******\n", ret);
+		return true;
+	}
+
+	printk("****** PS5000 not found ******\n");
+	return false;
+#else
+	int ret;
+
+	ret = pci_register_driver(&phison_pci_driver);
+
+	#ifdef PHISON_DEBUG
+	printk("****** phison_ide_init(), ret = %x ******\n", ret);
+	#endif
+
+	return ret;
+#endif
+
+
+}
+
+void phison_ide_exit(void)
+{
+	#ifdef PHISON_DEBUG
+	printk("****** phison_ide_exit() ******\n");
+	#endif
+	pci_unregister_driver(&phison_pci_driver);
+}
+
+module_init(phison_ide_init);
+module_exit(phison_ide_exit);
+
+MODULE_AUTHOR("Evan Ko");
+MODULE_DESCRIPTION("PCIE driver module for PHISON PS5000 E-BOX");//#0003
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);