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Alan Cox7e45b0e2006-09-29 18:30:05 +01001/*
2 * pata_winbond.c - Winbond VLB ATA controllers
3 * (C) 2006 Red Hat <alan@redhat.com>
4 *
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 Garzikcb48cab2007-02-26 06:04:24 -050019#define DRV_VERSION "0.0.2"
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
78 active = (FIT(t.active, 3, 17) - 1) & 0x0F;
79 recovery = (FIT(t.recover, 1, 15) + 1) & 0x0F;
80 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 */
90 reg |= (FIT(t.setup, 0, 3) << 6);
91 winbond_writecfg(winbond->config, timing + 1, reg);
92}
93
94
95static void winbond_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
96{
97 struct ata_port *ap = adev->ap;
98 int slop = buflen & 3;
99
100 if (ata_id_has_dword_io(adev->id)) {
101 if (write_data)
Tejun Heo0d5ff562007-02-01 15:06:36 +0900102 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100103 else
Tejun Heo0d5ff562007-02-01 15:06:36 +0900104 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100105
106 if (unlikely(slop)) {
107 u32 pad;
108 if (write_data) {
109 memcpy(&pad, buf + buflen - slop, slop);
Tejun Heo0d5ff562007-02-01 15:06:36 +0900110 pad = le32_to_cpu(pad);
111 iowrite32(pad, ap->ioaddr.data_addr);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100112 } else {
Tejun Heo0d5ff562007-02-01 15:06:36 +0900113 pad = ioread32(ap->ioaddr.data_addr);
114 pad = cpu_to_le16(pad);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100115 memcpy(buf + buflen - slop, &pad, slop);
116 }
117 }
118 } else
Tejun Heo0d5ff562007-02-01 15:06:36 +0900119 ata_data_xfer(adev, buf, buflen, write_data);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100120}
121
122static struct scsi_host_template winbond_sht = {
123 .module = THIS_MODULE,
124 .name = DRV_NAME,
125 .ioctl = ata_scsi_ioctl,
126 .queuecommand = ata_scsi_queuecmd,
127 .can_queue = ATA_DEF_QUEUE,
128 .this_id = ATA_SHT_THIS_ID,
129 .sg_tablesize = LIBATA_MAX_PRD,
Alan Cox7e45b0e2006-09-29 18:30:05 +0100130 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
131 .emulated = ATA_SHT_EMULATED,
132 .use_clustering = ATA_SHT_USE_CLUSTERING,
133 .proc_name = DRV_NAME,
134 .dma_boundary = ATA_DMA_BOUNDARY,
135 .slave_configure = ata_scsi_slave_config,
Tejun Heoc972b602006-11-29 12:10:46 +0900136 .slave_destroy = ata_scsi_slave_destroy,
Alan Cox7e45b0e2006-09-29 18:30:05 +0100137 .bios_param = ata_std_bios_param,
138};
139
140static struct ata_port_operations winbond_port_ops = {
141 .port_disable = ata_port_disable,
142 .set_piomode = winbond_set_piomode,
143
144 .tf_load = ata_tf_load,
145 .tf_read = ata_tf_read,
146 .check_status = ata_check_status,
147 .exec_command = ata_exec_command,
148 .dev_select = ata_std_dev_select,
149
150 .freeze = ata_bmdma_freeze,
151 .thaw = ata_bmdma_thaw,
152 .error_handler = ata_bmdma_error_handler,
153 .post_internal_cmd = ata_bmdma_post_internal_cmd,
Alan Cox2f5344b2007-03-26 21:43:42 -0800154 .cable_detect = ata_cable_40wire,
Alan Cox7e45b0e2006-09-29 18:30:05 +0100155
156 .qc_prep = ata_qc_prep,
157 .qc_issue = ata_qc_issue_prot,
158
159 .data_xfer = winbond_data_xfer,
160
Alan Cox7e45b0e2006-09-29 18:30:05 +0100161 .irq_clear = ata_bmdma_irq_clear,
Akira Iguchi246ce3b2007-01-26 16:27:58 +0900162 .irq_on = ata_irq_on,
163 .irq_ack = ata_irq_ack,
Alan Cox7e45b0e2006-09-29 18:30:05 +0100164
165 .port_start = ata_port_start,
Alan Cox7e45b0e2006-09-29 18:30:05 +0100166};
167
168/**
169 * winbond_init_one - attach a winbond interface
170 * @type: Type to display
171 * @io: I/O port start
172 * @irq: interrupt line
173 * @fast: True if on a > 33Mhz VLB
174 *
175 * Register a VLB bus IDE interface. Such interfaces are PIO and we
176 * assume do not support IRQ sharing.
177 */
178
179static __init int winbond_init_one(unsigned long port)
180{
Alan Cox7e45b0e2006-09-29 18:30:05 +0100181 struct platform_device *pdev;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100182 u8 reg;
Tejun Heo5d728822007-04-17 23:44:08 +0900183 int i, rc;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100184
185 reg = winbond_readcfg(port, 0x81);
186 reg |= 0x80; /* jumpered mode off */
187 winbond_writecfg(port, 0x81, reg);
188 reg = winbond_readcfg(port, 0x83);
189 reg |= 0xF0; /* local control */
190 winbond_writecfg(port, 0x83, reg);
191 reg = winbond_readcfg(port, 0x85);
192 reg |= 0xF0; /* programmable timing */
193 winbond_writecfg(port, 0x85, reg);
194
195 reg = winbond_readcfg(port, 0x81);
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500196
Alan Cox7e45b0e2006-09-29 18:30:05 +0100197 if (!(reg & 0x03)) /* Disabled */
198 return 0;
199
200 for (i = 0; i < 2 ; i ++) {
Tejun Heo0d5ff562007-02-01 15:06:36 +0900201 unsigned long cmd_port = 0x1F0 - (0x80 * i);
Tejun Heo5d728822007-04-17 23:44:08 +0900202 struct ata_host *host;
203 struct ata_port *ap;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900204 void __iomem *cmd_addr, *ctl_addr;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100205
Tejun Heo5d728822007-04-17 23:44:08 +0900206 if (!(reg & (1 << i)))
207 continue;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100208
Tejun Heo5d728822007-04-17 23:44:08 +0900209 pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
210 if (IS_ERR(pdev))
211 return PTR_ERR(pdev);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100212
Tejun Heo5d728822007-04-17 23:44:08 +0900213 rc = -ENOMEM;
214 host = ata_host_alloc(&pdev->dev, 1);
215 if (!host)
216 goto err_unregister;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900217
Tejun Heo5d728822007-04-17 23:44:08 +0900218 rc = -ENOMEM;
219 cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
220 ctl_addr = devm_ioport_map(&pdev->dev, cmd_port + 0x0206, 1);
221 if (!cmd_addr || !ctl_addr)
222 goto err_unregister;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100223
Tejun Heo5d728822007-04-17 23:44:08 +0900224 ap = host->ports[0];
225 ap->ops = &winbond_port_ops;
226 ap->pio_mask = 0x1F;
227 ap->flags |= ATA_FLAG_SLAVE_POSS;
228 ap->ioaddr.cmd_addr = cmd_addr;
229 ap->ioaddr.altstatus_addr = ctl_addr;
230 ap->ioaddr.ctl_addr = ctl_addr;
231 ata_std_ports(&ap->ioaddr);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100232
Tejun Heo5d728822007-04-17 23:44:08 +0900233 /* hook in a private data structure per channel */
234 host->private_data = &winbond_data[nr_winbond_host];
235 winbond_data[nr_winbond_host].config = port;
236 winbond_data[nr_winbond_host].platform_dev = pdev;
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500237
Tejun Heo5d728822007-04-17 23:44:08 +0900238 /* activate */
239 rc = ata_host_activate(host, 14 + i, ata_interrupt, 0,
240 &winbond_sht);
241 if (rc)
242 goto err_unregister;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100243
Tejun Heo5d728822007-04-17 23:44:08 +0900244 winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100245 }
246
247 return 0;
Tejun Heo5d728822007-04-17 23:44:08 +0900248
249 err_unregister:
250 platform_device_unregister(pdev);
251 return rc;
Alan Cox7e45b0e2006-09-29 18:30:05 +0100252}
253
254/**
255 * winbond_init - attach winbond interfaces
256 *
257 * Attach winbond IDE interfaces by scanning the ports it may occupy.
258 */
259
260static __init int winbond_init(void)
261{
262 static const unsigned long config[2] = { 0x130, 0x1B0 };
263
264 int ct = 0;
265 int i;
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500266
Alan Cox7e45b0e2006-09-29 18:30:05 +0100267 if (probe_winbond == 0)
268 return -ENODEV;
269
270 /*
271 * Check both base addresses
272 */
273
274 for (i = 0; i < 2; i++) {
275 if (probe_winbond & (1<<i)) {
276 int ret = 0;
277 unsigned long port = config[i];
278
279 if (request_region(port, 2, "pata_winbond")) {
280 ret = winbond_init_one(port);
281 if(ret <= 0)
282 release_region(port, 2);
283 else ct+= ret;
284 }
285 }
286 }
287 if (ct != 0)
288 return 0;
289 return -ENODEV;
290}
291
292static __exit void winbond_exit(void)
293{
294 int i;
295
296 for (i = 0; i < nr_winbond_host; i++) {
Tejun Heo24dc5f32007-01-20 16:00:28 +0900297 ata_host_detach(winbond_host[i]);
Alan Cox7e45b0e2006-09-29 18:30:05 +0100298 release_region(winbond_data[i].config, 2);
299 platform_device_unregister(winbond_data[i].platform_dev);
300 }
301}
302
303MODULE_AUTHOR("Alan Cox");
304MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
305MODULE_LICENSE("GPL");
306MODULE_VERSION(DRV_VERSION);
307
308module_init(winbond_init);
309module_exit(winbond_exit);
310
311module_param(probe_winbond, int, 0);
312