2 * pata_winbond.c - Winbond VLB ATA controllers
3 * (C) 2006 Red Hat <alan@redhat.com>
5 * Support for the Winbond 83759A when operating in advanced mode.
6 * Multichip mode is not currently supported.
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #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>
18 #define DRV_NAME "pata_winbond"
19 #define DRV_VERSION "0.0.3"
21 #define NR_HOST 4 /* Two winbond controllers, two channels each */
25 struct platform_device *platform_dev;
28 static struct ata_host *winbond_host[NR_HOST];
29 static struct winbond_data winbond_data[NR_HOST];
30 static int nr_winbond_host;
33 static int probe_winbond = 1;
35 static int probe_winbond;
38 static DEFINE_SPINLOCK(winbond_lock);
40 static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
43 spin_lock_irqsave(&winbond_lock, flags);
44 outb(reg, port + 0x01);
45 outb(val, port + 0x02);
46 spin_unlock_irqrestore(&winbond_lock, flags);
49 static u8 winbond_readcfg(unsigned long port, u8 reg)
54 spin_lock_irqsave(&winbond_lock, flags);
55 outb(reg, port + 0x01);
56 val = inb(port + 0x02);
57 spin_unlock_irqrestore(&winbond_lock, flags);
62 static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev)
65 struct winbond_data *winbond = ap->host->private_data;
68 int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);
70 reg = winbond_readcfg(winbond->config, 0x81);
72 /* 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);
76 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
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);
83 /* Load the setup timing */
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);
95 static unsigned int winbond_data_xfer(struct ata_device *dev,
96 unsigned char *buf, unsigned int buflen, int rw)
98 struct ata_port *ap = dev->link->ap;
99 int slop = buflen & 3;
101 if (ata_id_has_dword_io(dev->id)) {
103 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
105 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
107 if (unlikely(slop)) {
110 pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
111 memcpy(buf + buflen - slop, &pad, slop);
113 memcpy(&pad, buf + buflen - slop, slop);
114 iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
119 buflen = ata_data_xfer(dev, buf, buflen, rw);
124 static struct scsi_host_template winbond_sht = {
125 ATA_PIO_SHT(DRV_NAME),
128 static struct ata_port_operations winbond_port_ops = {
129 .set_piomode = winbond_set_piomode,
131 .tf_load = ata_tf_load,
132 .tf_read = ata_tf_read,
133 .check_status = ata_check_status,
134 .exec_command = ata_exec_command,
135 .dev_select = ata_std_dev_select,
137 .freeze = ata_bmdma_freeze,
138 .thaw = ata_bmdma_thaw,
139 .error_handler = ata_bmdma_error_handler,
140 .post_internal_cmd = ata_bmdma_post_internal_cmd,
141 .cable_detect = ata_cable_40wire,
143 .qc_prep = ata_qc_prep,
144 .qc_issue = ata_qc_issue_prot,
146 .data_xfer = winbond_data_xfer,
148 .irq_clear = ata_noop_irq_clear,
149 .irq_on = ata_irq_on,
151 .port_start = ata_sff_port_start,
155 * winbond_init_one - attach a winbond interface
156 * @type: Type to display
157 * @io: I/O port start
158 * @irq: interrupt line
159 * @fast: True if on a > 33Mhz VLB
161 * Register a VLB bus IDE interface. Such interfaces are PIO and we
162 * assume do not support IRQ sharing.
165 static __init int winbond_init_one(unsigned long port)
167 struct platform_device *pdev;
171 reg = winbond_readcfg(port, 0x81);
172 reg |= 0x80; /* jumpered mode off */
173 winbond_writecfg(port, 0x81, reg);
174 reg = winbond_readcfg(port, 0x83);
175 reg |= 0xF0; /* local control */
176 winbond_writecfg(port, 0x83, reg);
177 reg = winbond_readcfg(port, 0x85);
178 reg |= 0xF0; /* programmable timing */
179 winbond_writecfg(port, 0x85, reg);
181 reg = winbond_readcfg(port, 0x81);
183 if (!(reg & 0x03)) /* Disabled */
186 for (i = 0; i < 2 ; i ++) {
187 unsigned long cmd_port = 0x1F0 - (0x80 * i);
188 unsigned long ctl_port = cmd_port + 0x206;
189 struct ata_host *host;
191 void __iomem *cmd_addr, *ctl_addr;
193 if (!(reg & (1 << i)))
196 pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
198 return PTR_ERR(pdev);
201 host = ata_host_alloc(&pdev->dev, 1);
207 cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
208 ctl_addr = devm_ioport_map(&pdev->dev, ctl_port, 1);
209 if (!cmd_addr || !ctl_addr)
212 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", cmd_port, ctl_port);
214 ap->ops = &winbond_port_ops;
216 ap->flags |= ATA_FLAG_SLAVE_POSS;
217 ap->ioaddr.cmd_addr = cmd_addr;
218 ap->ioaddr.altstatus_addr = ctl_addr;
219 ap->ioaddr.ctl_addr = ctl_addr;
220 ata_std_ports(&ap->ioaddr);
222 /* hook in a private data structure per channel */
223 host->private_data = &winbond_data[nr_winbond_host];
224 winbond_data[nr_winbond_host].config = port;
225 winbond_data[nr_winbond_host].platform_dev = pdev;
228 rc = ata_host_activate(host, 14 + i, ata_interrupt, 0,
233 winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
239 platform_device_unregister(pdev);
244 * winbond_init - attach winbond interfaces
246 * Attach winbond IDE interfaces by scanning the ports it may occupy.
249 static __init int winbond_init(void)
251 static const unsigned long config[2] = { 0x130, 0x1B0 };
256 if (probe_winbond == 0)
260 * Check both base addresses
263 for (i = 0; i < 2; i++) {
264 if (probe_winbond & (1<<i)) {
266 unsigned long port = config[i];
268 if (request_region(port, 2, "pata_winbond")) {
269 ret = winbond_init_one(port);
271 release_region(port, 2);
281 static __exit void winbond_exit(void)
285 for (i = 0; i < nr_winbond_host; i++) {
286 ata_host_detach(winbond_host[i]);
287 release_region(winbond_data[i].config, 2);
288 platform_device_unregister(winbond_data[i].platform_dev);
292 MODULE_AUTHOR("Alan Cox");
293 MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
294 MODULE_LICENSE("GPL");
295 MODULE_VERSION(DRV_VERSION);
297 module_init(winbond_init);
298 module_exit(winbond_exit);
300 module_param(probe_winbond, int, 0);