1/*
2 * pata_cypress.c 	- Cypress PATA for new ATA layer
3 *			  (C) 2006 Red Hat Inc
4 *			  Alan Cox <alan@redhat.com>
5 *
6 * Based heavily on
7 * linux/drivers/ide/pci/cy82c693.c		Version 0.40	Sep. 10, 2002
8 *
9 */
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 <scsi/scsi_host.h>
18#include <linux/libata.h>
19
20#define DRV_NAME "pata_cypress"
21#define DRV_VERSION "0.1.5"
22
23/* here are the offset definitions for the registers */
24
25enum {
26	CY82_IDE_CMDREG		= 0x04,
27	CY82_IDE_ADDRSETUP	= 0x48,
28	CY82_IDE_MASTER_IOR	= 0x4C,
29	CY82_IDE_MASTER_IOW	= 0x4D,
30	CY82_IDE_SLAVE_IOR	= 0x4E,
31	CY82_IDE_SLAVE_IOW	= 0x4F,
32	CY82_IDE_MASTER_8BIT	= 0x50,
33	CY82_IDE_SLAVE_8BIT	= 0x51,
34
35	CY82_INDEX_PORT		= 0x22,
36	CY82_DATA_PORT		= 0x23,
37
38	CY82_INDEX_CTRLREG1	= 0x01,
39	CY82_INDEX_CHANNEL0	= 0x30,
40	CY82_INDEX_CHANNEL1	= 0x31,
41	CY82_INDEX_TIMEOUT	= 0x32
42};
43
44/**
45 *	cy82c693_set_piomode	-	set initial PIO mode data
46 *	@ap: ATA interface
47 *	@adev: ATA device
48 *
49 *	Called to do the PIO mode setup.
50 */
51
52static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev)
53{
54	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
55	struct ata_timing t;
56	const unsigned long T = 1000000 / 33;
57	short time_16, time_8;
58	u32 addr;
59
60	if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) {
61		printk(KERN_ERR DRV_NAME ": mome computation failed.\n");
62		return;
63	}
64
65	time_16 = FIT(t.recover, 0, 15) | (FIT(t.active, 0, 15) << 4);
66	time_8 = FIT(t.act8b, 0, 15) | (FIT(t.rec8b, 0, 15) << 4);
67
68	if (adev->devno == 0) {
69		pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
70
71		addr &= ~0x0F;	/* Mask bits */
72		addr |= FIT(t.setup, 0, 15);
73
74		pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
75		pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16);
76		pci_write_config_byte(pdev, CY82_IDE_MASTER_IOW, time_16);
77		pci_write_config_byte(pdev, CY82_IDE_MASTER_8BIT, time_8);
78	} else {
79		pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
80
81		addr &= ~0xF0;	/* Mask bits */
82		addr |= (FIT(t.setup, 0, 15) << 4);
83
84		pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
85		pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16);
86		pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOW, time_16);
87		pci_write_config_byte(pdev, CY82_IDE_SLAVE_8BIT, time_8);
88	}
89}
90
91/**
92 *	cy82c693_set_dmamode	-	set initial DMA mode data
93 *	@ap: ATA interface
94 *	@adev: ATA device
95 *
96 *	Called to do the DMA mode setup.
97 */
98
99static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev)
100{
101	int reg = CY82_INDEX_CHANNEL0 + ap->port_no;
102
103	/* Be afraid, be very afraid. Magic registers  in low I/O space */
104	outb(reg, 0x22);
105	outb(adev->dma_mode - XFER_MW_DMA_0, 0x23);
106
107	/* 0x50 gives the best behaviour on the Alpha's using this chip */
108	outb(CY82_INDEX_TIMEOUT, 0x22);
109	outb(0x50, 0x23);
110}
111
112static struct scsi_host_template cy82c693_sht = {
113	.module			= THIS_MODULE,
114	.name			= DRV_NAME,
115	.ioctl			= ata_scsi_ioctl,
116	.queuecommand		= ata_scsi_queuecmd,
117	.can_queue		= ATA_DEF_QUEUE,
118	.this_id		= ATA_SHT_THIS_ID,
119	.sg_tablesize		= LIBATA_MAX_PRD,
120	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
121	.emulated		= ATA_SHT_EMULATED,
122	.use_clustering		= ATA_SHT_USE_CLUSTERING,
123	.proc_name		= DRV_NAME,
124	.dma_boundary		= ATA_DMA_BOUNDARY,
125	.slave_configure	= ata_scsi_slave_config,
126	.slave_destroy		= ata_scsi_slave_destroy,
127	.bios_param		= ata_std_bios_param,
128};
129
130static struct ata_port_operations cy82c693_port_ops = {
131	.port_disable	= ata_port_disable,
132	.set_piomode	= cy82c693_set_piomode,
133	.set_dmamode	= cy82c693_set_dmamode,
134	.mode_filter	= ata_pci_default_filter,
135
136	.tf_load	= ata_tf_load,
137	.tf_read	= ata_tf_read,
138	.check_status 	= ata_check_status,
139	.exec_command	= ata_exec_command,
140	.dev_select 	= ata_std_dev_select,
141
142	.freeze		= ata_bmdma_freeze,
143	.thaw		= ata_bmdma_thaw,
144	.error_handler	= ata_bmdma_error_handler,
145	.post_internal_cmd = ata_bmdma_post_internal_cmd,
146	.cable_detect	= ata_cable_40wire,
147
148	.bmdma_setup 	= ata_bmdma_setup,
149	.bmdma_start 	= ata_bmdma_start,
150	.bmdma_stop	= ata_bmdma_stop,
151	.bmdma_status 	= ata_bmdma_status,
152
153	.qc_prep 	= ata_qc_prep,
154	.qc_issue	= ata_qc_issue_prot,
155
156	.data_xfer	= ata_data_xfer,
157
158	.irq_handler	= ata_interrupt,
159	.irq_clear	= ata_bmdma_irq_clear,
160	.irq_on		= ata_irq_on,
161	.irq_ack	= ata_irq_ack,
162
163	.port_start	= ata_port_start,
164};
165
166static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
167{
168	static const struct ata_port_info info = {
169		.sht = &cy82c693_sht,
170		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
171		.pio_mask = 0x1f,
172		.mwdma_mask = 0x07,
173		.port_ops = &cy82c693_port_ops
174	};
175	const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
176
177
178	if (PCI_FUNC(pdev->devfn) != 1)
179		return -ENODEV;
180
181	return ata_pci_init_one(pdev, ppi);
182}
183
184static const struct pci_device_id cy82c693[] = {
185	{ PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), },
186
187	{ },
188};
189
190static struct pci_driver cy82c693_pci_driver = {
191	.name 		= DRV_NAME,
192	.id_table	= cy82c693,
193	.probe 		= cy82c693_init_one,
194	.remove		= ata_pci_remove_one,
195#ifdef CONFIG_PM
196	.suspend	= ata_pci_device_suspend,
197	.resume		= ata_pci_device_resume,
198#endif
199};
200
201static int __init cy82c693_init(void)
202{
203	return pci_register_driver(&cy82c693_pci_driver);
204}
205
206
207static void __exit cy82c693_exit(void)
208{
209	pci_unregister_driver(&cy82c693_pci_driver);
210}
211
212
213MODULE_AUTHOR("Alan Cox");
214MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller");
215MODULE_LICENSE("GPL");
216MODULE_DEVICE_TABLE(pci, cy82c693);
217MODULE_VERSION(DRV_VERSION);
218
219module_init(cy82c693_init);
220module_exit(cy82c693_exit);
221