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Commit | Line | Data |
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7e45b0e5 AC |
1 | /* |
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 | */ | |
f20b16ff | 8 | |
7e45b0e5 AC |
9 | #include <linux/kernel.h> |
10 | #include <linux/module.h> | |
7e45b0e5 AC |
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> | |
17 | ||
18 | #define DRV_NAME "pata_winbond" | |
8bc3fc47 | 19 | #define DRV_VERSION "0.0.3" |
7e45b0e5 AC |
20 | |
21 | #define NR_HOST 4 /* Two winbond controllers, two channels each */ | |
22 | ||
23 | struct winbond_data { | |
24 | unsigned long config; | |
25 | struct platform_device *platform_dev; | |
26 | }; | |
27 | ||
28 | static struct ata_host *winbond_host[NR_HOST]; | |
29 | static struct winbond_data winbond_data[NR_HOST]; | |
30 | static int nr_winbond_host; | |
31 | ||
32 | #ifdef MODULE | |
33 | static int probe_winbond = 1; | |
34 | #else | |
35 | static int probe_winbond; | |
36 | #endif | |
37 | ||
22503631 | 38 | static DEFINE_SPINLOCK(winbond_lock); |
7e45b0e5 AC |
39 | |
40 | static 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 | ||
49 | static 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 | ||
62 | static 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); | |
f20b16ff | 71 | |
7e45b0e5 AC |
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); | |
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); | |
f20b16ff | 82 | |
7e45b0e5 | 83 | /* Load the setup timing */ |
f20b16ff | 84 | |
7e45b0e5 AC |
85 | 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 | ||
95 | static void winbond_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data) | |
96 | { | |
9af5c9c9 | 97 | struct ata_port *ap = adev->link->ap; |
7e45b0e5 AC |
98 | int slop = buflen & 3; |
99 | ||
100 | if (ata_id_has_dword_io(adev->id)) { | |
101 | if (write_data) | |
0d5ff566 | 102 | iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); |
7e45b0e5 | 103 | else |
0d5ff566 | 104 | ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); |
7e45b0e5 AC |
105 | |
106 | if (unlikely(slop)) { | |
107 | u32 pad; | |
108 | if (write_data) { | |
109 | memcpy(&pad, buf + buflen - slop, slop); | |
0d5ff566 TH |
110 | pad = le32_to_cpu(pad); |
111 | iowrite32(pad, ap->ioaddr.data_addr); | |
7e45b0e5 | 112 | } else { |
0d5ff566 TH |
113 | pad = ioread32(ap->ioaddr.data_addr); |
114 | pad = cpu_to_le16(pad); | |
7e45b0e5 AC |
115 | memcpy(buf + buflen - slop, &pad, slop); |
116 | } | |
117 | } | |
118 | } else | |
0d5ff566 | 119 | ata_data_xfer(adev, buf, buflen, write_data); |
7e45b0e5 AC |
120 | } |
121 | ||
122 | static 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, | |
7e45b0e5 AC |
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, | |
c972b60b | 136 | .slave_destroy = ata_scsi_slave_destroy, |
7e45b0e5 AC |
137 | .bios_param = ata_std_bios_param, |
138 | }; | |
139 | ||
140 | static struct ata_port_operations winbond_port_ops = { | |
7e45b0e5 AC |
141 | .set_piomode = winbond_set_piomode, |
142 | ||
143 | .tf_load = ata_tf_load, | |
144 | .tf_read = ata_tf_read, | |
145 | .check_status = ata_check_status, | |
146 | .exec_command = ata_exec_command, | |
147 | .dev_select = ata_std_dev_select, | |
148 | ||
149 | .freeze = ata_bmdma_freeze, | |
150 | .thaw = ata_bmdma_thaw, | |
151 | .error_handler = ata_bmdma_error_handler, | |
152 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | |
2f5344b1 | 153 | .cable_detect = ata_cable_40wire, |
7e45b0e5 AC |
154 | |
155 | .qc_prep = ata_qc_prep, | |
156 | .qc_issue = ata_qc_issue_prot, | |
157 | ||
158 | .data_xfer = winbond_data_xfer, | |
159 | ||
7e45b0e5 | 160 | .irq_clear = ata_bmdma_irq_clear, |
246ce3b6 | 161 | .irq_on = ata_irq_on, |
7e45b0e5 | 162 | |
81ad1837 | 163 | .port_start = ata_sff_port_start, |
7e45b0e5 AC |
164 | }; |
165 | ||
166 | /** | |
167 | * winbond_init_one - attach a winbond interface | |
168 | * @type: Type to display | |
169 | * @io: I/O port start | |
170 | * @irq: interrupt line | |
171 | * @fast: True if on a > 33Mhz VLB | |
172 | * | |
173 | * Register a VLB bus IDE interface. Such interfaces are PIO and we | |
174 | * assume do not support IRQ sharing. | |
175 | */ | |
176 | ||
177 | static __init int winbond_init_one(unsigned long port) | |
178 | { | |
7e45b0e5 | 179 | struct platform_device *pdev; |
7e45b0e5 | 180 | u8 reg; |
5d728824 | 181 | int i, rc; |
7e45b0e5 AC |
182 | |
183 | reg = winbond_readcfg(port, 0x81); | |
184 | reg |= 0x80; /* jumpered mode off */ | |
185 | winbond_writecfg(port, 0x81, reg); | |
186 | reg = winbond_readcfg(port, 0x83); | |
187 | reg |= 0xF0; /* local control */ | |
188 | winbond_writecfg(port, 0x83, reg); | |
189 | reg = winbond_readcfg(port, 0x85); | |
190 | reg |= 0xF0; /* programmable timing */ | |
191 | winbond_writecfg(port, 0x85, reg); | |
192 | ||
193 | reg = winbond_readcfg(port, 0x81); | |
f20b16ff | 194 | |
7e45b0e5 AC |
195 | if (!(reg & 0x03)) /* Disabled */ |
196 | return 0; | |
197 | ||
198 | for (i = 0; i < 2 ; i ++) { | |
0d5ff566 | 199 | unsigned long cmd_port = 0x1F0 - (0x80 * i); |
cbcdd875 | 200 | unsigned long ctl_port = cmd_port + 0x206; |
5d728824 TH |
201 | struct ata_host *host; |
202 | struct ata_port *ap; | |
0d5ff566 | 203 | void __iomem *cmd_addr, *ctl_addr; |
7e45b0e5 | 204 | |
5d728824 TH |
205 | if (!(reg & (1 << i))) |
206 | continue; | |
207 | ||
208 | pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0); | |
209 | if (IS_ERR(pdev)) | |
210 | return PTR_ERR(pdev); | |
211 | ||
212 | rc = -ENOMEM; | |
213 | host = ata_host_alloc(&pdev->dev, 1); | |
214 | if (!host) | |
215 | goto err_unregister; | |
cbcdd875 | 216 | ap = host->ports[0]; |
5d728824 TH |
217 | |
218 | rc = -ENOMEM; | |
219 | cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8); | |
cbcdd875 | 220 | ctl_addr = devm_ioport_map(&pdev->dev, ctl_port, 1); |
5d728824 TH |
221 | if (!cmd_addr || !ctl_addr) |
222 | goto err_unregister; | |
223 | ||
cbcdd875 TH |
224 | ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", cmd_port, ctl_port); |
225 | ||
5d728824 TH |
226 | ap->ops = &winbond_port_ops; |
227 | ap->pio_mask = 0x1F; | |
228 | ap->flags |= ATA_FLAG_SLAVE_POSS; | |
229 | ap->ioaddr.cmd_addr = cmd_addr; | |
230 | ap->ioaddr.altstatus_addr = ctl_addr; | |
231 | ap->ioaddr.ctl_addr = ctl_addr; | |
232 | ata_std_ports(&ap->ioaddr); | |
233 | ||
234 | /* hook in a private data structure per channel */ | |
235 | host->private_data = &winbond_data[nr_winbond_host]; | |
236 | winbond_data[nr_winbond_host].config = port; | |
237 | winbond_data[nr_winbond_host].platform_dev = pdev; | |
238 | ||
239 | /* activate */ | |
240 | rc = ata_host_activate(host, 14 + i, ata_interrupt, 0, | |
241 | &winbond_sht); | |
242 | if (rc) | |
243 | goto err_unregister; | |
244 | ||
245 | winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev); | |
7e45b0e5 AC |
246 | } |
247 | ||
248 | return 0; | |
5d728824 TH |
249 | |
250 | err_unregister: | |
251 | platform_device_unregister(pdev); | |
252 | return rc; | |
7e45b0e5 AC |
253 | } |
254 | ||
255 | /** | |
256 | * winbond_init - attach winbond interfaces | |
257 | * | |
258 | * Attach winbond IDE interfaces by scanning the ports it may occupy. | |
259 | */ | |
260 | ||
261 | static __init int winbond_init(void) | |
262 | { | |
263 | static const unsigned long config[2] = { 0x130, 0x1B0 }; | |
264 | ||
265 | int ct = 0; | |
266 | int i; | |
f20b16ff | 267 | |
7e45b0e5 AC |
268 | if (probe_winbond == 0) |
269 | return -ENODEV; | |
270 | ||
271 | /* | |
272 | * Check both base addresses | |
273 | */ | |
274 | ||
275 | for (i = 0; i < 2; i++) { | |
276 | if (probe_winbond & (1<<i)) { | |
277 | int ret = 0; | |
278 | unsigned long port = config[i]; | |
279 | ||
280 | if (request_region(port, 2, "pata_winbond")) { | |
281 | ret = winbond_init_one(port); | |
b447916e | 282 | if (ret <= 0) |
7e45b0e5 AC |
283 | release_region(port, 2); |
284 | else ct+= ret; | |
285 | } | |
286 | } | |
287 | } | |
288 | if (ct != 0) | |
289 | return 0; | |
290 | return -ENODEV; | |
291 | } | |
292 | ||
293 | static __exit void winbond_exit(void) | |
294 | { | |
295 | int i; | |
296 | ||
297 | for (i = 0; i < nr_winbond_host; i++) { | |
24dc5f33 | 298 | ata_host_detach(winbond_host[i]); |
7e45b0e5 AC |
299 | release_region(winbond_data[i].config, 2); |
300 | platform_device_unregister(winbond_data[i].platform_dev); | |
301 | } | |
302 | } | |
303 | ||
304 | MODULE_AUTHOR("Alan Cox"); | |
305 | MODULE_DESCRIPTION("low-level driver for Winbond VL ATA"); | |
306 | MODULE_LICENSE("GPL"); | |
307 | MODULE_VERSION(DRV_VERSION); | |
308 | ||
309 | module_init(winbond_init); | |
310 | module_exit(winbond_exit); | |
311 | ||
312 | module_param(probe_winbond, int, 0); | |
313 |