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Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
2 * pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the
3 * PATA port of the controller. The SATA ports are
4 * driven by AHCI in the usual configuration although
5 * this driver can handle other setups if we need it.
6 *
7 * (c) 2006 Red Hat <alan@redhat.com>
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/pci.h>
13#include <linux/init.h>
14#include <linux/blkdev.h>
15#include <linux/delay.h>
16#include <linux/device.h>
17#include <scsi/scsi_host.h>
18#include <linux/libata.h>
19#include <linux/ata.h>
20
21#define DRV_NAME "pata_jmicron"
22#define DRV_VERSION "0.1.2"
23
24typedef enum {
25 PORT_PATA0 = 0,
26 PORT_PATA1 = 1,
27 PORT_SATA = 2,
28} port_type;
29
30/**
31 * jmicron_pre_reset - check for 40/80 pin
32 * @ap: Port
33 *
34 * Perform the PATA port setup we need.
35
36 * On the Jmicron 361/363 there is a single PATA port that can be mapped
37 * either as primary or secondary (or neither). We don't do any policy
38 * and setup here. We assume that has been done by init_one and the
39 * BIOS.
40 */
41
42static int jmicron_pre_reset(struct ata_port *ap)
43{
44 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
45 u32 control;
46 u32 control5;
47 int port_mask = 1<< (4 * ap->port_no);
48 int port = ap->port_no;
49 port_type port_map[2];
50
51 /* Check if our port is enabled */
52 pci_read_config_dword(pdev, 0x40, &control);
53 if ((control & port_mask) == 0)
Alan Coxc9619222006-09-26 17:53:38 +010054 return -ENOENT;
Jeff Garzik669a5db2006-08-29 18:12:40 -040055
56 /* There are two basic mappings. One has the two SATA ports merged
57 as master/slave and the secondary as PATA, the other has only the
58 SATA port mapped */
59 if (control & (1 << 23)) {
60 port_map[0] = PORT_SATA;
61 port_map[1] = PORT_PATA0;
62 } else {
63 port_map[0] = PORT_SATA;
64 port_map[1] = PORT_SATA;
65 }
66
67 /* The 365/366 may have this bit set to map the second PATA port
68 as the internal primary channel */
69 pci_read_config_dword(pdev, 0x80, &control5);
70 if (control5 & (1<<24))
71 port_map[0] = PORT_PATA1;
72
73 /* The two ports may then be logically swapped by the firmware */
74 if (control & (1 << 22))
75 port = port ^ 1;
76
77 /*
78 * Now we know which physical port we are talking about we can
79 * actually do our cable checking etc. Thankfully we don't need
80 * to do the plumbing for other cases.
81 */
82 switch (port_map[port])
83 {
84 case PORT_PATA0:
85 if (control & (1 << 5))
86 return 0;
87 if (control & (1 << 3)) /* 40/80 pin primary */
88 ap->cbl = ATA_CBL_PATA40;
89 else
90 ap->cbl = ATA_CBL_PATA80;
91 break;
92 case PORT_PATA1:
93 /* Bit 21 is set if the port is enabled */
94 if ((control5 & (1 << 21)) == 0)
95 return 0;
96 if (control5 & (1 << 19)) /* 40/80 pin secondary */
97 ap->cbl = ATA_CBL_PATA40;
98 else
99 ap->cbl = ATA_CBL_PATA80;
100 break;
101 case PORT_SATA:
102 ap->cbl = ATA_CBL_SATA;
103 break;
104 }
105 return ata_std_prereset(ap);
106}
107
108/**
109 * jmicron_error_handler - Setup and error handler
110 * @ap: Port to handle
111 *
112 * LOCKING:
113 * None (inherited from caller).
114 */
115
116static void jmicron_error_handler(struct ata_port *ap)
117{
118 return ata_bmdma_drive_eh(ap, jmicron_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
119}
120
121/* No PIO or DMA methods needed for this device */
122
123static struct scsi_host_template jmicron_sht = {
124 .module = THIS_MODULE,
125 .name = DRV_NAME,
126 .ioctl = ata_scsi_ioctl,
127 .queuecommand = ata_scsi_queuecmd,
128 .can_queue = ATA_DEF_QUEUE,
129 .this_id = ATA_SHT_THIS_ID,
130 .sg_tablesize = LIBATA_MAX_PRD,
131 /* Special handling needed if you have sector or LBA48 limits */
132 .max_sectors = ATA_MAX_SECTORS,
133 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
134 .emulated = ATA_SHT_EMULATED,
135 .use_clustering = ATA_SHT_USE_CLUSTERING,
136 .proc_name = DRV_NAME,
137 .dma_boundary = ATA_DMA_BOUNDARY,
138 .slave_configure = ata_scsi_slave_config,
139 /* Use standard CHS mapping rules */
140 .bios_param = ata_std_bios_param,
141};
142
143static const struct ata_port_operations jmicron_ops = {
144 .port_disable = ata_port_disable,
145
146 /* Task file is PCI ATA format, use helpers */
147 .tf_load = ata_tf_load,
148 .tf_read = ata_tf_read,
149 .check_status = ata_check_status,
150 .exec_command = ata_exec_command,
151 .dev_select = ata_std_dev_select,
152
153 .freeze = ata_bmdma_freeze,
154 .thaw = ata_bmdma_thaw,
155 .error_handler = jmicron_error_handler,
156 .post_internal_cmd = ata_bmdma_post_internal_cmd,
157
158 /* BMDMA handling is PCI ATA format, use helpers */
159 .bmdma_setup = ata_bmdma_setup,
160 .bmdma_start = ata_bmdma_start,
161 .bmdma_stop = ata_bmdma_stop,
162 .bmdma_status = ata_bmdma_status,
163 .qc_prep = ata_qc_prep,
164 .qc_issue = ata_qc_issue_prot,
165 .data_xfer = ata_pio_data_xfer,
166
Jeff Garzikbda30282006-09-27 05:41:13 -0400167 /* IRQ-related hooks */
Jeff Garzik669a5db2006-08-29 18:12:40 -0400168 .irq_handler = ata_interrupt,
169 .irq_clear = ata_bmdma_irq_clear,
170
171 /* Generic PATA PCI ATA helpers */
172 .port_start = ata_port_start,
173 .port_stop = ata_port_stop,
174 .host_stop = ata_host_stop,
175};
176
177
178/**
179 * jmicron_init_one - Register Jmicron ATA PCI device with kernel services
180 * @pdev: PCI device to register
181 * @ent: Entry in jmicron_pci_tbl matching with @pdev
182 *
183 * Called from kernel PCI layer.
184 *
185 * LOCKING:
186 * Inherited from PCI layer (may sleep).
187 *
188 * RETURNS:
189 * Zero on success, or -ERRNO value.
190 */
191
192static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
193{
194 static struct ata_port_info info = {
195 .sht = &jmicron_sht,
196 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
197
198 .pio_mask = 0x1f,
199 .mwdma_mask = 0x07,
200 .udma_mask = 0x3f,
201
202 .port_ops = &jmicron_ops,
203 };
204 struct ata_port_info *port_info[2] = { &info, &info };
205
206 u32 reg;
207
208 if (id->driver_data != 368) {
209 /* Put the controller into AHCI mode in case the AHCI driver
210 has not yet been loaded. This can be done with either
211 function present */
212
213 /* FIXME: We may want a way to override this in future */
214 pci_write_config_byte(pdev, 0x41, 0xa1);
215 }
216
217 /* PATA controller is fn 1, AHCI is fn 0 */
218 if (PCI_FUNC(pdev->devfn) != 1)
219 return -ENODEV;
220
221 if ( id->driver_data == 365 || id->driver_data == 366) {
222 /* The 365/66 have two PATA channels, redirect the second */
223 pci_read_config_dword(pdev, 0x80, &reg);
224 reg |= (1 << 24); /* IDE1 to PATA IDE secondary */
225 pci_write_config_dword(pdev, 0x80, reg);
226 }
227
228 return ata_pci_init_one(pdev, port_info, 2);
229}
230
231static const struct pci_device_id jmicron_pci_tbl[] = {
232 { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 361},
233 { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 363},
234 { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365), 365},
235 { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366), 366},
236 { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368), 368},
237 { } /* terminate list */
238};
239
240static struct pci_driver jmicron_pci_driver = {
241 .name = DRV_NAME,
242 .id_table = jmicron_pci_tbl,
243 .probe = jmicron_init_one,
244 .remove = ata_pci_remove_one,
245};
246
247static int __init jmicron_init(void)
248{
249 return pci_register_driver(&jmicron_pci_driver);
250}
251
252static void __exit jmicron_exit(void)
253{
254 pci_unregister_driver(&jmicron_pci_driver);
255}
256
257module_init(jmicron_init);
258module_exit(jmicron_exit);
259
260MODULE_AUTHOR("Alan Cox");
261MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports");
262MODULE_LICENSE("GPL");
263MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
264MODULE_VERSION(DRV_VERSION);
265