1
2/*
3 * Copyright (C) 2006		Red Hat
4 *
5 *  May be copied or modified under the terms of the GNU General Public License
6 */
7
8#include <linux/types.h>
9#include <linux/module.h>
10#include <linux/pci.h>
11#include <linux/ide.h>
12#include <linux/init.h>
13
14#define DRV_NAME "jmicron"
15
16typedef enum {
17	PORT_PATA0 = 0,
18	PORT_PATA1 = 1,
19	PORT_SATA = 2,
20} port_type;
21
22/**
23 *	jmicron_cable_detect	-	cable detection
24 *	@hwif: IDE port
25 *
26 *	Returns the cable type.
27 */
28
29static u8 jmicron_cable_detect(ide_hwif_t *hwif)
30{
31	struct pci_dev *pdev = to_pci_dev(hwif->dev);
32
33	u32 control;
34	u32 control5;
35
36	int port = hwif->channel;
37	port_type port_map[2];
38
39	pci_read_config_dword(pdev, 0x40, &control);
40
41	/* There are two basic mappings. One has the two SATA ports merged
42	   as master/slave and the secondary as PATA, the other has only the
43	   SATA port mapped */
44	if (control & (1 << 23)) {
45		port_map[0] = PORT_SATA;
46		port_map[1] = PORT_PATA0;
47	} else {
48		port_map[0] = PORT_SATA;
49		port_map[1] = PORT_SATA;
50	}
51
52	/* The 365/366 may have this bit set to map the second PATA port
53	   as the internal primary channel */
54	pci_read_config_dword(pdev, 0x80, &control5);
55	if (control5 & (1<<24))
56		port_map[0] = PORT_PATA1;
57
58	/* The two ports may then be logically swapped by the firmware */
59	if (control & (1 << 22))
60		port = port ^ 1;
61
62	/*
63	 *	Now we know which physical port we are talking about we can
64	 *	actually do our cable checking etc. Thankfully we don't need
65	 *	to do the plumbing for other cases.
66	 */
67	switch (port_map[port]) {
68	case PORT_PATA0:
69		if (control & (1 << 3))	/* 40/80 pin primary */
70			return ATA_CBL_PATA40;
71		return ATA_CBL_PATA80;
72	case PORT_PATA1:
73		if (control5 & (1 << 19))	/* 40/80 pin secondary */
74			return ATA_CBL_PATA40;
75		return ATA_CBL_PATA80;
76	case PORT_SATA:
77		break;
78	}
79	/* Avoid bogus "control reaches end of non-void function" */
80	return ATA_CBL_PATA80;
81}
82
83static void jmicron_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
84{
85}
86
87/**
88 *	jmicron_set_dma_mode	-	set host controller for DMA mode
89 *	@hwif: port
90 *	@drive: drive
91 *
92 *	As the JMicron snoops for timings we don't need to do anything here.
93 */
94
95static void jmicron_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
96{
97}
98
99static const struct ide_port_ops jmicron_port_ops = {
100	.set_pio_mode		= jmicron_set_pio_mode,
101	.set_dma_mode		= jmicron_set_dma_mode,
102	.cable_detect		= jmicron_cable_detect,
103};
104
105static const struct ide_port_info jmicron_chipset = {
106	.name		= DRV_NAME,
107	.enablebits	= { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
108	.port_ops	= &jmicron_port_ops,
109	.pio_mask	= ATA_PIO5,
110	.mwdma_mask	= ATA_MWDMA2,
111	.udma_mask	= ATA_UDMA6,
112};
113
114/**
115 *	jmicron_init_one	-	pci layer discovery entry
116 *	@dev: PCI device
117 *	@id: ident table entry
118 *
119 *	Called by the PCI code when it finds a Jmicron controller.
120 *	We then use the IDE PCI generic helper to do most of the work.
121 */
122
123static int jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
124{
125	return ide_pci_init_one(dev, &jmicron_chipset, NULL);
126}
127
128/* All JMB PATA controllers have and will continue to have the same
129 * interface.  Matching vendor and device class is enough for all
130 * current and future controllers if the controller is programmed
131 * properly.
132 *
133 * If libata is configured, jmicron PCI quirk programs the controller
134 * into the correct mode.  If libata isn't configured, match known
135 * device IDs too to maintain backward compatibility.
136 */
137static struct pci_device_id jmicron_pci_tbl[] = {
138#if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE)
139	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) },
140	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) },
141	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) },
142	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) },
143	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) },
144#endif
145	{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
146	  PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
147	{ 0, },
148};
149
150MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
151
152static struct pci_driver jmicron_pci_driver = {
153	.name		= "JMicron IDE",
154	.id_table	= jmicron_pci_tbl,
155	.probe		= jmicron_init_one,
156	.remove		= ide_pci_remove,
157	.suspend	= ide_pci_suspend,
158	.resume		= ide_pci_resume,
159};
160
161static int __init jmicron_ide_init(void)
162{
163	return ide_pci_register_driver(&jmicron_pci_driver);
164}
165
166static void __exit jmicron_ide_exit(void)
167{
168	pci_unregister_driver(&jmicron_pci_driver);
169}
170
171module_init(jmicron_ide_init);
172module_exit(jmicron_ide_exit);
173
174MODULE_AUTHOR("Alan Cox");
175MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
176MODULE_LICENSE("GPL");
177