1/*
2 * Zalon 53c7xx device driver.
3 * By Richard Hirst (rhirst@linuxcare.com)
4 */
5
6#include <linux/init.h>
7#include <linux/interrupt.h>
8#include <linux/module.h>
9#include <linux/types.h>
10#include <asm/hardware.h>
11#include <asm/io.h>
12
13#include "../parisc/gsc.h"
14
15#include "ncr53c8xx.h"
16
17MODULE_AUTHOR("Richard Hirst");
18MODULE_DESCRIPTION("Bluefish/Zalon 720 SCSI Driver");
19MODULE_LICENSE("GPL");
20
21#define GSC_SCSI_ZALON_OFFSET 0x800
22
23#define IO_MODULE_EIM		(1*4)
24#define IO_MODULE_DC_ADATA	(2*4)
25#define IO_MODULE_II_CDATA	(3*4)
26#define IO_MODULE_IO_COMMAND	(12*4)
27#define IO_MODULE_IO_STATUS	(13*4)
28
29#define IOSTATUS_RY		0x40
30#define IOSTATUS_FE		0x80
31#define IOIIDATA_SMINT5L	0x40000000
32#define IOIIDATA_MINT5EN	0x20000000
33#define IOIIDATA_PACKEN		0x10000000
34#define IOIIDATA_PREFETCHEN	0x08000000
35#define IOIIDATA_IOII		0x00000020
36
37#define CMD_RESET		5
38
39static struct ncr_chip zalon720_chip __initdata = {
40	.revision_id =	0x0f,
41	.burst_max =	3,
42	.offset_max =	8,
43	.nr_divisor =	4,
44	.features =	FE_WIDE | FE_DIFF | FE_EHP| FE_MUX | FE_EA,
45};
46
47
48
49
50static struct scsi_host_template zalon7xx_template = {
51	.module		= THIS_MODULE,
52	.proc_name	= "zalon7xx",
53};
54
55static int __init
56zalon_probe(struct parisc_device *dev)
57{
58	struct gsc_irq gsc_irq;
59	u32 zalon_vers;
60	int error = -ENODEV;
61	void __iomem *zalon = ioremap_nocache(dev->hpa.start, 4096);
62	void __iomem *io_port = zalon + GSC_SCSI_ZALON_OFFSET;
63	static int unit = 0;
64	struct Scsi_Host *host;
65	struct ncr_device device;
66
67	__raw_writel(CMD_RESET, zalon + IO_MODULE_IO_COMMAND);
68	while (!(__raw_readl(zalon + IO_MODULE_IO_STATUS) & IOSTATUS_RY))
69		cpu_relax();
70	__raw_writel(IOIIDATA_MINT5EN | IOIIDATA_PACKEN | IOIIDATA_PREFETCHEN,
71		zalon + IO_MODULE_II_CDATA);
72
73	zalon_vers = (__raw_readl(zalon + IO_MODULE_II_CDATA) >> 24) & 0x07;
74
75	/* Setup the interrupts first.
76	** Later on request_irq() will register the handler.
77	*/
78	dev->irq = gsc_alloc_irq(&gsc_irq);
79
80	printk(KERN_INFO "%s: Zalon version %d, IRQ %d\n", __FUNCTION__,
81		zalon_vers, dev->irq);
82
83	__raw_writel(gsc_irq.txn_addr | gsc_irq.txn_data, zalon + IO_MODULE_EIM);
84
85	if (zalon_vers == 0)
86		printk(KERN_WARNING "%s: Zalon 1.1 or earlier\n", __FUNCTION__);
87
88	memset(&device, 0, sizeof(struct ncr_device));
89
90	/* The following three are needed before any other access. */
91	__raw_writeb(0x20, io_port + 0x38); /* DCNTL_REG,  EA  */
92	__raw_writeb(0x04, io_port + 0x1b); /* CTEST0_REG, EHP */
93	__raw_writeb(0x80, io_port + 0x22); /* CTEST4_REG, MUX */
94
95	/* Initialise ncr_device structure with items required by ncr_attach. */
96	device.chip		= zalon720_chip;
97	device.host_id		= 7;
98	device.dev		= &dev->dev;
99	device.slot.base	= dev->hpa.start + GSC_SCSI_ZALON_OFFSET;
100	device.slot.base_v	= io_port;
101	device.slot.irq		= dev->irq;
102	device.differential	= 2;
103
104	host = ncr_attach(&zalon7xx_template, unit, &device);
105	if (!host)
106		goto fail;
107
108	if (request_irq(dev->irq, ncr53c8xx_intr, IRQF_SHARED, "zalon", host)) {
109		printk(KERN_ERR "%s: irq problem with %d, detaching\n ",
110			dev->dev.bus_id, dev->irq);
111		goto fail;
112	}
113
114	unit++;
115
116	dev_set_drvdata(&dev->dev, host);
117
118	error = scsi_add_host(host, &dev->dev);
119	if (error)
120		goto fail_free_irq;
121
122	scsi_scan_host(host);
123	return 0;
124
125 fail_free_irq:
126	free_irq(dev->irq, host);
127 fail:
128	ncr53c8xx_release(host);
129	return error;
130}
131
132static struct parisc_device_id zalon_tbl[] = {
133	{ HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00089 },
134	{ 0, }
135};
136
137MODULE_DEVICE_TABLE(parisc, zalon_tbl);
138
139static int __exit zalon_remove(struct parisc_device *dev)
140{
141	struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
142
143	scsi_remove_host(host);
144	ncr53c8xx_release(host);
145	free_irq(dev->irq, host);
146
147	return 0;
148}
149
150static struct parisc_driver zalon_driver = {
151	.name =		"zalon",
152	.id_table =	zalon_tbl,
153	.probe =	zalon_probe,
154	.remove =	__devexit_p(zalon_remove),
155};
156
157static int __init zalon7xx_init(void)
158{
159	int ret = ncr53c8xx_init();
160	if (!ret)
161		ret = register_parisc_driver(&zalon_driver);
162	if (ret)
163		ncr53c8xx_exit();
164	return ret;
165}
166
167static void __exit zalon7xx_exit(void)
168{
169	unregister_parisc_driver(&zalon_driver);
170	ncr53c8xx_exit();
171}
172
173module_init(zalon7xx_init);
174module_exit(zalon7xx_exit);
175