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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2006-10-16 11:40:06 -0400
committerJeff Garzik <jeff@garzik.org>2006-12-01 22:40:27 -0500
commit75742cb41e4b5c7913f385b9688aad69c9fa7ada (patch)
tree7b9637fa9a4a99c0e61dfe6cbb93175756013004 /drivers/ata/pata_marvell.c
parent72dc6794fcd7642200a87bf18e3a43e676314b63 (diff)
[PATCH] pata_marvell: Marvell 6101/6145 PATA driver
This is a legacy mode PATA driver for the 6101/45 and will also drive the SATA ports 1 & 2 in legacy mode as well if desired. Tested and confirmed working by users. The chip supports AHCI type behaviour for SATA and has a more advanced PATA interface as well so this driver will get it working but not get best performance for now. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/pata_marvell.c')
-rw-r--r--drivers/ata/pata_marvell.c221
1 files changed, 221 insertions, 0 deletions
diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c
new file mode 100644
index 000000000000..2b8e00cb7b9b
--- /dev/null
+++ b/drivers/ata/pata_marvell.c
@@ -0,0 +1,221 @@
1/*
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 *
8 * (c) 2006 Red Hat <alan@redhat.com>
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 <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"
23#define DRV_VERSION "0.0.4t"
24
25/**
26 * marvell_pre_reset - check for 40/80 pin
27 * @ap: Port
28 *
29 * Perform the PATA port setup we need.
30 */
31
32static int marvell_pre_reset(struct ata_port *ap)
33{
34 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
35 u32 devices;
36 unsigned long bar5;
37 void __iomem *barp;
38 int i;
39
40 /* Check if our port is enabled */
41
42 bar5 = pci_resource_start(pdev, 5);
43 barp = ioremap(bar5, 0x10);
44 if (barp == NULL)
45 return -ENOMEM;
46 printk("BAR5:");
47 for(i = 0; i <= 0x0F; i++)
48 printk("%02X:%02X ", i, readb(barp + i));
49 printk("\n");
50
51 devices = readl(barp + 0x0C);
52 iounmap(barp);
53
54 if (pdev->device == 0x6145 && ap->port_no == 0 && !(devices & 0x10)) /* PATA enable ? */
55 return -ENOENT;
56
57 /* Cable type */
58 switch(ap->port_no)
59 {
60 case 0:
61 /* Might be backward, docs unclear */
62 if(inb(ap->ioaddr.bmdma_addr + 1) & 1)
63 ap->cbl = ATA_CBL_PATA80;
64 else
65 ap->cbl = ATA_CBL_PATA40;
66
67 case 1: /* Legacy SATA port */
68 ap->cbl = ATA_CBL_SATA;
69 break;
70 }
71 return ata_std_prereset(ap);
72}
73
74/**
75 * marvell_error_handler - Setup and error handler
76 * @ap: Port to handle
77 *
78 * LOCKING:
79 * None (inherited from caller).
80 */
81
82static void marvell_error_handler(struct ata_port *ap)
83{
84 return ata_bmdma_drive_eh(ap, marvell_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
85}
86
87/* No PIO or DMA methods needed for this device */
88
89static struct scsi_host_template marvell_sht = {
90 .module = THIS_MODULE,
91 .name = DRV_NAME,
92 .ioctl = ata_scsi_ioctl,
93 .queuecommand = ata_scsi_queuecmd,
94 .can_queue = ATA_DEF_QUEUE,
95 .this_id = ATA_SHT_THIS_ID,
96 .sg_tablesize = LIBATA_MAX_PRD,
97 .max_sectors = ATA_MAX_SECTORS,
98 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
99 .emulated = ATA_SHT_EMULATED,
100 .use_clustering = ATA_SHT_USE_CLUSTERING,
101 .proc_name = DRV_NAME,
102 .dma_boundary = ATA_DMA_BOUNDARY,
103 .slave_configure = ata_scsi_slave_config,
104 /* Use standard CHS mapping rules */
105 .bios_param = ata_std_bios_param,
106};
107
108static const struct ata_port_operations marvell_ops = {
109 .port_disable = ata_port_disable,
110
111 /* Task file is PCI ATA format, use helpers */
112 .tf_load = ata_tf_load,
113 .tf_read = ata_tf_read,
114 .check_status = ata_check_status,
115 .exec_command = ata_exec_command,
116 .dev_select = ata_std_dev_select,
117
118 .freeze = ata_bmdma_freeze,
119 .thaw = ata_bmdma_thaw,
120 .error_handler = marvell_error_handler,
121 .post_internal_cmd = ata_bmdma_post_internal_cmd,
122
123 /* BMDMA handling is PCI ATA format, use helpers */
124 .bmdma_setup = ata_bmdma_setup,
125 .bmdma_start = ata_bmdma_start,
126 .bmdma_stop = ata_bmdma_stop,
127 .bmdma_status = ata_bmdma_status,
128 .qc_prep = ata_qc_prep,
129 .qc_issue = ata_qc_issue_prot,
130 .data_xfer = ata_pio_data_xfer,
131
132 /* Timeout handling */
133 .eng_timeout = ata_eng_timeout,
134 .irq_handler = ata_interrupt,
135 .irq_clear = ata_bmdma_irq_clear,
136
137 /* Generic PATA PCI ATA helpers */
138 .port_start = ata_port_start,
139 .port_stop = ata_port_stop,
140 .host_stop = ata_host_stop,
141};
142
143
144/**
145 * marvell_init_one - Register Marvell ATA PCI device with kernel services
146 * @pdev: PCI device to register
147 * @ent: Entry in marvell_pci_tbl matching with @pdev
148 *
149 * Called from kernel PCI layer.
150 *
151 * LOCKING:
152 * Inherited from PCI layer (may sleep).
153 *
154 * RETURNS:
155 * Zero on success, or -ERRNO value.
156 */
157
158static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
159{
160 static struct ata_port_info info = {
161 .sht = &marvell_sht,
162 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
163
164 .pio_mask = 0x1f,
165 .mwdma_mask = 0x07,
166 .udma_mask = 0x3f,
167
168 .port_ops = &marvell_ops,
169 };
170 static struct ata_port_info info_sata = {
171 .sht = &marvell_sht,
172 /* Slave possible as its magically mapped not real */
173 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
174
175 .pio_mask = 0x1f,
176 .mwdma_mask = 0x07,
177 .udma_mask = 0x7f,
178
179 .port_ops = &marvell_ops,
180 };
181 struct ata_port_info *port_info[2] = { &info, &info_sata };
182 int n_port = 2;
183
184 if (pdev->device == 0x6101)
185 n_port = 1;
186
187 return ata_pci_init_one(pdev, port_info, n_port);
188}
189
190static const struct pci_device_id marvell_pci_tbl[] = {
191 { PCI_DEVICE(0x11AB, 0x6101), },
192 { PCI_DEVICE(0x11AB, 0x6145), },
193 { } /* terminate list */
194};
195
196static struct pci_driver marvell_pci_driver = {
197 .name = DRV_NAME,
198 .id_table = marvell_pci_tbl,
199 .probe = marvell_init_one,
200 .remove = ata_pci_remove_one,
201};
202
203static int __init marvell_init(void)
204{
205 return pci_register_driver(&marvell_pci_driver);
206}
207
208static void __exit marvell_exit(void)
209{
210 pci_unregister_driver(&marvell_pci_driver);
211}
212
213module_init(marvell_init);
214module_exit(marvell_exit);
215
216MODULE_AUTHOR("Alan Cox");
217MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");
218MODULE_LICENSE("GPL");
219MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);
220MODULE_VERSION(DRV_VERSION);
221