blob: 6d8619b6f670639fd3a34ffa51cd79452921af07 [file] [log] [blame]
Alan Cox7e45b0e2006-09-29 18:30:05 +01001/*
2 * pata_winbond.c - Winbond VLB ATA controllers
Alan Coxab771632008-10-27 15:09:10 +00003 * (C) 2006 Red Hat
Alan Cox7e45b0e2006-09-29 18:30:05 +01004 *
5 * Support for the Winbond 83759A when operating in advanced mode.
6 * Multichip mode is not currently supported.
7 */
Jeff Garzikf20b16f2006-12-11 11:14:06 -05008
Alan Cox7e45b0e2006-09-29 18:30:05 +01009#include <linux/kernel.h>
10#include <linux/module.h>
Alan Cox7e45b0e2006-09-29 18:30:05 +010011#include <linux/init.h>
12#include <linux/blkdev.h>
13#include <linux/delay.h>
14#include <scsi/scsi_host.h>
15#include <linux/libata.h>
16#include <linux/platform_device.h>
17
18#define DRV_NAME "pata_winbond"
Jeff Garzik8bc3fc42007-05-21 20:26:38 -040019#define DRV_VERSION "0.0.3"
Alan Cox7e45b0e2006-09-29 18:30:05 +010020
21#define NR_HOST 4 /* Two winbond controllers, two channels each */
22
23struct winbond_data {
24 unsigned long config;
25 struct platform_device *platform_dev;
26};
27
28static struct ata_host *winbond_host[NR_HOST];
29static struct winbond_data winbond_data[NR_HOST];
30static int nr_winbond_host;
31
32#ifdef MODULE
33static int probe_winbond = 1;
34#else
35static int probe_winbond;
36#endif
37
Milind Arun Choudhary22503632007-04-26 00:19:27 -070038static DEFINE_SPINLOCK(winbond_lock);
Alan Cox7e45b0e2006-09-29 18:30:05 +010039
40static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
41{
42 unsigned long flags;
43 spin_lock_irqsave(&winbond_lock, flags);
44 outb(reg, port + 0x01);
45 outb(val, port + 0x02);
46 spin_unlock_irqrestore(&winbond_lock, flags);
47}
48
49static u8 winbond_readcfg(unsigned long port, u8 reg)
50{
51 u8 val;
52
53 unsigned long flags;
54 spin_lock_irqsave(&winbond_lock, flags);
55 outb(reg, port + 0x01);
56 val = inb(port + 0x02);
57 spin_unlock_irqrestore(&winbond_lock, flags);
58
59 return val;
60}
61
62static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev)
63{
64 struct ata_timing t;
65 struct winbond_data *winbond = ap->host->private_data;
66 int active, recovery;
67 u8 reg;
68 int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);
69
70 reg = winbond_readcfg(winbond->config, 0x81);
Jeff Garzikf20b16f2006-12-11 11:14:06 -050071
Alan Cox7e45b0e2006-09-29 18:30:05 +010072 /* Get the timing data in cycles */
73 if (reg & 0x40) /* Fast VLB bus, assume 50MHz */
74 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
75 else
76 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
77
Harvey Harrison07633b52008-05-14 16:17:00 -070078 active = (clamp_val(t.active, 3, 17) - 1) & 0x0F;
79 recovery = (clamp_val(t.recover, 1, 15) + 1) & 0x0F;
Alan Cox7e45b0e2006-09-29 18:30:05 +010080 timing = (active << 4) | recovery;
81 winbond_writecfg(winbond->config, timing, reg);
Jeff Garzikf20b16f2006-12-11 11:14:06 -050082
Alan Cox7e45b0e2006-09-29 18:30:05 +010083 /* Load the setup timing */
Jeff Garzikf20b16f2006-12-11 11:14:06 -050084
Alan Cox7e45b0e2006-09-29 18:30:05 +010085 reg = 0x35;
86 if (adev->class != ATA_DEV_ATA)
87 reg |= 0x08; /* FIFO off */
88 if (!ata_pio_need_iordy(adev))
89 reg |= 0x02; /* IORDY off */
Harvey Harrison07633b52008-05-14 16:17:00 -070090 reg |= (clamp_val(t.setup, 0, 3) << 6);
Alan Cox7e45b0e2006-09-29 18:30:05 +010091 winbond_writecfg(winbond->config, timing + 1, reg);
92}
93
94
Andrew Morton045eeb42008-01-10 14:33:04 -080095static unsigned int winbond_data_xfer(struct ata_device *dev,
96 unsigned char *buf, unsigned int buflen, int rw)
Alan Cox7e45b0e2006-09-29 18:30:05 +010097{
Tejun Heo55dba312007-12-05 16:43:07 +090098 struct ata_port *ap = dev->link->ap;
Alan Cox7e45b0e2006-09-29 18:30:05 +010099 int slop = buflen & 3;
100
Tejun Heo55dba312007-12-05 16:43:07 +0900101 if (ata_id_has_dword_io(dev->id)) {
102 if (rw == READ)
Tejun Heo0d5ff562007-02-01 15:06:36 +0900103 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
Tejun Heo55dba312007-12-05 16:43:07 +0900104 else
105 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100106
107 if (unlikely(slop)) {
Harvey Harrison6ad67402008-06-18 17:16:43 -0700108 __le32 pad;
Tejun Heo55dba312007-12-05 16:43:07 +0900109 if (rw == READ) {
Al Virob50e56d2008-01-12 14:16:14 +0000110 pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
Alan Cox7e45b0e2006-09-29 18:30:05 +0100111 memcpy(buf + buflen - slop, &pad, slop);
Tejun Heo55dba312007-12-05 16:43:07 +0900112 } else {
113 memcpy(&pad, buf + buflen - slop, slop);
114 iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100115 }
Tejun Heo55dba312007-12-05 16:43:07 +0900116 buflen += 4 - slop;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100117 }
118 } else
Tejun Heo9363c382008-04-07 22:47:16 +0900119 buflen = ata_sff_data_xfer(dev, buf, buflen, rw);
Tejun Heo55dba312007-12-05 16:43:07 +0900120
121 return buflen;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100122}
123
124static struct scsi_host_template winbond_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900125 ATA_PIO_SHT(DRV_NAME),
Alan Cox7e45b0e2006-09-29 18:30:05 +0100126};
127
128static struct ata_port_operations winbond_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900129 .inherits = &ata_sff_port_ops,
Tejun Heo5682ed32008-04-07 22:47:16 +0900130 .sff_data_xfer = winbond_data_xfer,
Tejun Heo029cfd62008-03-25 12:22:49 +0900131 .cable_detect = ata_cable_40wire,
132 .set_piomode = winbond_set_piomode,
Alan Cox7e45b0e2006-09-29 18:30:05 +0100133};
134
135/**
136 * winbond_init_one - attach a winbond interface
137 * @type: Type to display
138 * @io: I/O port start
139 * @irq: interrupt line
140 * @fast: True if on a > 33Mhz VLB
141 *
142 * Register a VLB bus IDE interface. Such interfaces are PIO and we
143 * assume do not support IRQ sharing.
144 */
145
146static __init int winbond_init_one(unsigned long port)
147{
Alan Cox7e45b0e2006-09-29 18:30:05 +0100148 struct platform_device *pdev;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100149 u8 reg;
Tejun Heo5d728822007-04-17 23:44:08 +0900150 int i, rc;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100151
152 reg = winbond_readcfg(port, 0x81);
153 reg |= 0x80; /* jumpered mode off */
154 winbond_writecfg(port, 0x81, reg);
155 reg = winbond_readcfg(port, 0x83);
156 reg |= 0xF0; /* local control */
157 winbond_writecfg(port, 0x83, reg);
158 reg = winbond_readcfg(port, 0x85);
159 reg |= 0xF0; /* programmable timing */
160 winbond_writecfg(port, 0x85, reg);
161
162 reg = winbond_readcfg(port, 0x81);
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500163
Alan Cox7e45b0e2006-09-29 18:30:05 +0100164 if (!(reg & 0x03)) /* Disabled */
Alan Cox3e9b9022008-01-19 15:53:55 +0000165 return -ENODEV;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100166
167 for (i = 0; i < 2 ; i ++) {
Tejun Heo0d5ff562007-02-01 15:06:36 +0900168 unsigned long cmd_port = 0x1F0 - (0x80 * i);
Tejun Heocbcdd872007-08-18 13:14:55 +0900169 unsigned long ctl_port = cmd_port + 0x206;
Tejun Heo5d728822007-04-17 23:44:08 +0900170 struct ata_host *host;
171 struct ata_port *ap;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900172 void __iomem *cmd_addr, *ctl_addr;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100173
Tejun Heo5d728822007-04-17 23:44:08 +0900174 if (!(reg & (1 << i)))
175 continue;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100176
Tejun Heo5d728822007-04-17 23:44:08 +0900177 pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
178 if (IS_ERR(pdev))
179 return PTR_ERR(pdev);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100180
Tejun Heo5d728822007-04-17 23:44:08 +0900181 rc = -ENOMEM;
182 host = ata_host_alloc(&pdev->dev, 1);
183 if (!host)
184 goto err_unregister;
Tejun Heocbcdd872007-08-18 13:14:55 +0900185 ap = host->ports[0];
Tejun Heo0d5ff562007-02-01 15:06:36 +0900186
Tejun Heo5d728822007-04-17 23:44:08 +0900187 rc = -ENOMEM;
188 cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
Tejun Heocbcdd872007-08-18 13:14:55 +0900189 ctl_addr = devm_ioport_map(&pdev->dev, ctl_port, 1);
Tejun Heo5d728822007-04-17 23:44:08 +0900190 if (!cmd_addr || !ctl_addr)
191 goto err_unregister;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100192
Tejun Heocbcdd872007-08-18 13:14:55 +0900193 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", cmd_port, ctl_port);
194
Tejun Heo5d728822007-04-17 23:44:08 +0900195 ap->ops = &winbond_port_ops;
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100196 ap->pio_mask = ATA_PIO4;
Tejun Heo5d728822007-04-17 23:44:08 +0900197 ap->flags |= ATA_FLAG_SLAVE_POSS;
198 ap->ioaddr.cmd_addr = cmd_addr;
199 ap->ioaddr.altstatus_addr = ctl_addr;
200 ap->ioaddr.ctl_addr = ctl_addr;
Tejun Heo9363c382008-04-07 22:47:16 +0900201 ata_sff_std_ports(&ap->ioaddr);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100202
Tejun Heo5d728822007-04-17 23:44:08 +0900203 /* hook in a private data structure per channel */
204 host->private_data = &winbond_data[nr_winbond_host];
205 winbond_data[nr_winbond_host].config = port;
206 winbond_data[nr_winbond_host].platform_dev = pdev;
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500207
Tejun Heo5d728822007-04-17 23:44:08 +0900208 /* activate */
Tejun Heo9363c382008-04-07 22:47:16 +0900209 rc = ata_host_activate(host, 14 + i, ata_sff_interrupt, 0,
Tejun Heo5d728822007-04-17 23:44:08 +0900210 &winbond_sht);
211 if (rc)
212 goto err_unregister;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100213
Tejun Heo5d728822007-04-17 23:44:08 +0900214 winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100215 }
216
217 return 0;
Tejun Heo5d728822007-04-17 23:44:08 +0900218
219 err_unregister:
220 platform_device_unregister(pdev);
221 return rc;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100222}
223
224/**
225 * winbond_init - attach winbond interfaces
226 *
227 * Attach winbond IDE interfaces by scanning the ports it may occupy.
228 */
229
230static __init int winbond_init(void)
231{
232 static const unsigned long config[2] = { 0x130, 0x1B0 };
233
234 int ct = 0;
235 int i;
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500236
Alan Cox7e45b0e2006-09-29 18:30:05 +0100237 if (probe_winbond == 0)
238 return -ENODEV;
239
240 /*
241 * Check both base addresses
242 */
243
244 for (i = 0; i < 2; i++) {
245 if (probe_winbond & (1<<i)) {
246 int ret = 0;
247 unsigned long port = config[i];
248
249 if (request_region(port, 2, "pata_winbond")) {
250 ret = winbond_init_one(port);
Jeff Garzikb4479162007-10-25 20:47:30 -0400251 if (ret <= 0)
Alan Cox7e45b0e2006-09-29 18:30:05 +0100252 release_region(port, 2);
253 else ct+= ret;
254 }
255 }
256 }
257 if (ct != 0)
258 return 0;
259 return -ENODEV;
260}
261
262static __exit void winbond_exit(void)
263{
264 int i;
265
266 for (i = 0; i < nr_winbond_host; i++) {
Tejun Heo24dc5f32007-01-20 16:00:28 +0900267 ata_host_detach(winbond_host[i]);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100268 release_region(winbond_data[i].config, 2);
269 platform_device_unregister(winbond_data[i].platform_dev);
270 }
271}
272
273MODULE_AUTHOR("Alan Cox");
274MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
275MODULE_LICENSE("GPL");
276MODULE_VERSION(DRV_VERSION);
277
278module_init(winbond_init);
279module_exit(winbond_exit);
280
281module_param(probe_winbond, int, 0);
282