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Alan Cox75742cb2006-10-16 16:40:06 +01001/*
2 * Marvell PATA driver.
3 *
4 * For the moment we drive the PATA port in legacy mode. That
5 * isn't making full use of the device functionality but it is
6 * easy to get working.
7 *
Alan Coxab771632008-10-27 15:09:10 +00008 * (c) 2006 Red Hat
Alan Cox75742cb2006-10-16 16:40:06 +01009 */
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/pci.h>
14#include <linux/init.h>
15#include <linux/blkdev.h>
16#include <linux/delay.h>
17#include <linux/device.h>
18#include <scsi/scsi_host.h>
19#include <linux/libata.h>
20#include <linux/ata.h>
21
22#define DRV_NAME "pata_marvell"
Alan Cox5b66c822008-09-03 14:48:34 +010023#define DRV_VERSION "0.1.6"
24
25/**
26 * marvell_pata_active - check if PATA is active
27 * @pdev: PCI device
28 *
29 * Returns 1 if the PATA port may be active. We know how to check this
30 * for the 6145 but not the other devices
31 */
32
33static int marvell_pata_active(struct pci_dev *pdev)
34{
35 int i;
36 u32 devices;
37 void __iomem *barp;
38
39 /* We don't yet know how to do this for other devices */
40 if (pdev->device != 0x6145)
Jeff Garzik4fca3772011-02-15 01:13:24 -050041 return 1;
Alan Cox5b66c822008-09-03 14:48:34 +010042
43 barp = pci_iomap(pdev, 5, 0x10);
44 if (barp == NULL)
45 return -ENOMEM;
46
47 printk("BAR5:");
48 for(i = 0; i <= 0x0F; i++)
49 printk("%02X:%02X ", i, ioread8(barp + i));
50 printk("\n");
51
52 devices = ioread32(barp + 0x0C);
53 pci_iounmap(pdev, barp);
54
55 if (devices & 0x10)
56 return 1;
57 return 0;
58}
Alan Cox75742cb2006-10-16 16:40:06 +010059
60/**
Bartlomiej Zolnierkiewicz2a2beac92009-12-03 20:32:12 +010061 * marvell_pre_reset - probe begin
Tejun Heocc0680a2007-08-06 18:36:23 +090062 * @link: link
Tejun Heod4b2bab2007-02-02 16:50:52 +090063 * @deadline: deadline jiffies for the operation
Alan Cox75742cb2006-10-16 16:40:06 +010064 *
65 * Perform the PATA port setup we need.
66 */
67
Tejun Heocc0680a2007-08-06 18:36:23 +090068static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
Alan Cox75742cb2006-10-16 16:40:06 +010069{
Tejun Heocc0680a2007-08-06 18:36:23 +090070 struct ata_port *ap = link->ap;
Alan Cox75742cb2006-10-16 16:40:06 +010071 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
Alan Cox75742cb2006-10-16 16:40:06 +010072
Alan Cox5b66c822008-09-03 14:48:34 +010073 if (pdev->device == 0x6145 && ap->port_no == 0 &&
74 !marvell_pata_active(pdev)) /* PATA enable ? */
75 return -ENOENT;
Jeff Garzik27c78b32007-03-09 09:41:19 -050076
Tejun Heo9363c382008-04-07 22:47:16 +090077 return ata_sff_prereset(link, deadline);
Alan Cox307c6052007-03-07 16:48:09 +000078}
Alan Cox75742cb2006-10-16 16:40:06 +010079
Alan Cox307c6052007-03-07 16:48:09 +000080static int marvell_cable_detect(struct ata_port *ap)
81{
Alan Cox75742cb2006-10-16 16:40:06 +010082 /* Cable type */
83 switch(ap->port_no)
84 {
Jeff Garzik6e9d8622006-10-21 15:54:13 -040085 case 0:
Tejun Heo0d5ff562007-02-01 15:06:36 +090086 if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1)
Alan Cox307c6052007-03-07 16:48:09 +000087 return ATA_CBL_PATA40;
88 return ATA_CBL_PATA80;
Jeff Garzik6e9d8622006-10-21 15:54:13 -040089 case 1: /* Legacy SATA port */
Alan Cox307c6052007-03-07 16:48:09 +000090 return ATA_CBL_SATA;
Alan Cox75742cb2006-10-16 16:40:06 +010091 }
Tejun Heod4b2bab2007-02-02 16:50:52 +090092
Alan Cox307c6052007-03-07 16:48:09 +000093 BUG();
94 return 0; /* Our BUG macro needs the right markup */
Alan Cox75742cb2006-10-16 16:40:06 +010095}
96
Alan Cox75742cb2006-10-16 16:40:06 +010097/* No PIO or DMA methods needed for this device */
98
99static struct scsi_host_template marvell_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900100 ATA_BMDMA_SHT(DRV_NAME),
Alan Cox75742cb2006-10-16 16:40:06 +0100101};
102
Tejun Heo029cfd62008-03-25 12:22:49 +0900103static struct ata_port_operations marvell_ops = {
104 .inherits = &ata_bmdma_port_ops,
Alan Cox307c6052007-03-07 16:48:09 +0000105 .cable_detect = marvell_cable_detect,
Tejun Heo887125e2008-03-25 12:22:49 +0900106 .prereset = marvell_pre_reset,
Alan Cox75742cb2006-10-16 16:40:06 +0100107};
108
109
110/**
111 * marvell_init_one - Register Marvell ATA PCI device with kernel services
112 * @pdev: PCI device to register
113 * @ent: Entry in marvell_pci_tbl matching with @pdev
114 *
115 * Called from kernel PCI layer.
116 *
117 * LOCKING:
118 * Inherited from PCI layer (may sleep).
119 *
120 * RETURNS:
121 * Zero on success, or -ERRNO value.
122 */
123
124static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
125{
Tejun Heo1626aeb2007-05-04 12:43:58 +0200126 static const struct ata_port_info info = {
Jeff Garzik1d2808f2007-05-28 06:59:48 -0400127 .flags = ATA_FLAG_SLAVE_POSS,
Alan Cox75742cb2006-10-16 16:40:06 +0100128
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100129 .pio_mask = ATA_PIO4,
130 .mwdma_mask = ATA_MWDMA2,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400131 .udma_mask = ATA_UDMA5,
Alan Cox75742cb2006-10-16 16:40:06 +0100132
133 .port_ops = &marvell_ops,
134 };
Tejun Heo1626aeb2007-05-04 12:43:58 +0200135 static const struct ata_port_info info_sata = {
Alan Cox75742cb2006-10-16 16:40:06 +0100136 /* Slave possible as its magically mapped not real */
Jeff Garzik1d2808f2007-05-28 06:59:48 -0400137 .flags = ATA_FLAG_SLAVE_POSS,
Alan Cox75742cb2006-10-16 16:40:06 +0100138
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100139 .pio_mask = ATA_PIO4,
140 .mwdma_mask = ATA_MWDMA2,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400141 .udma_mask = ATA_UDMA6,
Alan Cox75742cb2006-10-16 16:40:06 +0100142
143 .port_ops = &marvell_ops,
144 };
Tejun Heo1626aeb2007-05-04 12:43:58 +0200145 const struct ata_port_info *ppi[] = { &info, &info_sata };
Jeff Garzik6e9d8622006-10-21 15:54:13 -0400146
Alan Cox75742cb2006-10-16 16:40:06 +0100147 if (pdev->device == 0x6101)
Tejun Heo1626aeb2007-05-04 12:43:58 +0200148 ppi[1] = &ata_dummy_port_info;
Jeff Garzik6e9d8622006-10-21 15:54:13 -0400149
Christoph Eggercb6643e2010-02-05 16:26:35 +0100150#if defined(CONFIG_SATA_AHCI) || defined(CONFIG_SATA_AHCI_MODULE)
Alan Cox5b66c822008-09-03 14:48:34 +0100151 if (!marvell_pata_active(pdev)) {
152 printk(KERN_INFO DRV_NAME ": PATA port not active, deferring to AHCI driver.\n");
153 return -ENODEV;
154 }
155#endif
Tejun Heo1c5afdf2010-05-19 22:10:22 +0200156 return ata_pci_bmdma_init_one(pdev, ppi, &marvell_sht, NULL, 0);
Alan Cox75742cb2006-10-16 16:40:06 +0100157}
158
159static const struct pci_device_id marvell_pci_tbl[] = {
160 { PCI_DEVICE(0x11AB, 0x6101), },
Alan Coxd36ee182007-08-23 20:19:55 +0100161 { PCI_DEVICE(0x11AB, 0x6121), },
162 { PCI_DEVICE(0x11AB, 0x6123), },
Alan Cox75742cb2006-10-16 16:40:06 +0100163 { PCI_DEVICE(0x11AB, 0x6145), },
164 { } /* terminate list */
165};
166
167static struct pci_driver marvell_pci_driver = {
168 .name = DRV_NAME,
169 .id_table = marvell_pci_tbl,
170 .probe = marvell_init_one,
171 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900172#ifdef CONFIG_PM
Alan30ced0f2006-11-22 16:57:36 +0000173 .suspend = ata_pci_device_suspend,
174 .resume = ata_pci_device_resume,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900175#endif
Alan Cox75742cb2006-10-16 16:40:06 +0100176};
177
178static int __init marvell_init(void)
179{
180 return pci_register_driver(&marvell_pci_driver);
181}
182
183static void __exit marvell_exit(void)
184{
185 pci_unregister_driver(&marvell_pci_driver);
186}
187
188module_init(marvell_init);
189module_exit(marvell_exit);
190
191MODULE_AUTHOR("Alan Cox");
192MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");
193MODULE_LICENSE("GPL");
194MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);
195MODULE_VERSION(DRV_VERSION);
196