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 "0.0.2"
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 spinlock_t winbond_lock = SPIN_LOCK_UNLOCKED;
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 void winbond_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
97 struct ata_port *ap = adev->ap;
98 int slop = buflen & 3;
100 if (ata_id_has_dword_io(adev->id)) {
102 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
104 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
106 if (unlikely(slop)) {
109 memcpy(&pad, buf + buflen - slop, slop);
110 pad = le32_to_cpu(pad);
111 iowrite32(pad, ap->ioaddr.data_addr);
113 pad = ioread32(ap->ioaddr.data_addr);
114 pad = cpu_to_le16(pad);
115 memcpy(buf + buflen - slop, &pad, slop);
119 ata_data_xfer(adev, buf, buflen, write_data);
122 static struct scsi_host_template winbond_sht = {
123 .module = THIS_MODULE,
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,
130 .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,
136 .slave_destroy = ata_scsi_slave_destroy,
137 .bios_param = ata_std_bios_param,
140 static struct ata_port_operations winbond_port_ops = {
141 .port_disable = ata_port_disable,
142 .set_piomode = winbond_set_piomode,
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,
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,
154 .cable_detect = ata_cable_40wire,
156 .qc_prep = ata_qc_prep,
157 .qc_issue = ata_qc_issue_prot,
159 .data_xfer = winbond_data_xfer,
161 .irq_handler = ata_interrupt,
162 .irq_clear = ata_bmdma_irq_clear,
163 .irq_on = ata_irq_on,
164 .irq_ack = ata_irq_ack,
166 .port_start = ata_port_start,
170 * winbond_init_one - attach a winbond interface
171 * @type: Type to display
172 * @io: I/O port start
173 * @irq: interrupt line
174 * @fast: True if on a > 33Mhz VLB
176 * Register a VLB bus IDE interface. Such interfaces are PIO and we
177 * assume do not support IRQ sharing.
180 static __init int winbond_init_one(unsigned long port)
182 struct ata_probe_ent ae;
183 struct platform_device *pdev;
188 reg = winbond_readcfg(port, 0x81);
189 reg |= 0x80; /* jumpered mode off */
190 winbond_writecfg(port, 0x81, reg);
191 reg = winbond_readcfg(port, 0x83);
192 reg |= 0xF0; /* local control */
193 winbond_writecfg(port, 0x83, reg);
194 reg = winbond_readcfg(port, 0x85);
195 reg |= 0xF0; /* programmable timing */
196 winbond_writecfg(port, 0x85, reg);
198 reg = winbond_readcfg(port, 0x81);
200 if (!(reg & 0x03)) /* Disabled */
203 for (i = 0; i < 2 ; i ++) {
204 unsigned long cmd_port = 0x1F0 - (0x80 * i);
205 void __iomem *cmd_addr, *ctl_addr;
207 if (reg & (1 << i)) {
209 * Fill in a probe structure first of all
212 pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
214 return PTR_ERR(pdev);
216 cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
217 ctl_addr = devm_ioport_map(&pdev->dev, cmd_port + 0x0206, 1);
218 if (!cmd_addr || !ctl_addr) {
219 platform_device_unregister(pdev);
223 memset(&ae, 0, sizeof(struct ata_probe_ent));
224 INIT_LIST_HEAD(&ae.node);
227 ae.port_ops = &winbond_port_ops;
230 ae.sht = &winbond_sht;
235 ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
236 ae.port[0].cmd_addr = cmd_addr;
237 ae.port[0].altstatus_addr = ctl_addr;
238 ae.port[0].ctl_addr = ctl_addr;
239 ata_std_ports(&ae.port[0]);
241 * Hook in a private data structure per channel
243 ae.private_data = &winbond_data[nr_winbond_host];
244 winbond_data[nr_winbond_host].config = port;
245 winbond_data[nr_winbond_host].platform_dev = pdev;
247 ret = ata_device_add(&ae);
249 platform_device_unregister(pdev);
252 winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
260 * winbond_init - attach winbond interfaces
262 * Attach winbond IDE interfaces by scanning the ports it may occupy.
265 static __init int winbond_init(void)
267 static const unsigned long config[2] = { 0x130, 0x1B0 };
272 if (probe_winbond == 0)
276 * Check both base addresses
279 for (i = 0; i < 2; i++) {
280 if (probe_winbond & (1<<i)) {
282 unsigned long port = config[i];
284 if (request_region(port, 2, "pata_winbond")) {
285 ret = winbond_init_one(port);
287 release_region(port, 2);
297 static __exit void winbond_exit(void)
301 for (i = 0; i < nr_winbond_host; i++) {
302 ata_host_detach(winbond_host[i]);
303 release_region(winbond_data[i].config, 2);
304 platform_device_unregister(winbond_data[i].platform_dev);
308 MODULE_AUTHOR("Alan Cox");
309 MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
310 MODULE_LICENSE("GPL");
311 MODULE_VERSION(DRV_VERSION);
313 module_init(winbond_init);
314 module_exit(winbond_exit);
316 module_param(probe_winbond, int, 0);