Commit | Line | Data |
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1c2a49f6 AV |
1 | /* |
2 | * AHCI SATA platform driver | |
3 | * | |
4 | * Copyright 2004-2005 Red Hat, Inc. | |
5 | * Jeff Garzik <jgarzik@pobox.com> | |
6 | * Copyright 2010 MontaVista Software, LLC. | |
7 | * Anton Vorontsov <avorontsov@ru.mvista.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2, or (at your option) | |
12 | * any later version. | |
13 | */ | |
14 | ||
f1e70c2c | 15 | #include <linux/clk.h> |
1c2a49f6 | 16 | #include <linux/kernel.h> |
fbaf666b | 17 | #include <linux/gfp.h> |
1c2a49f6 | 18 | #include <linux/module.h> |
18c25ff4 | 19 | #include <linux/pm.h> |
1c2a49f6 AV |
20 | #include <linux/init.h> |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/device.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/libata.h> | |
25 | #include <linux/ahci_platform.h> | |
26 | #include "ahci.h" | |
27 | ||
904c04fe RZ |
28 | enum ahci_type { |
29 | AHCI, /* standard platform ahci */ | |
30 | IMX53_AHCI, /* ahci on i.mx53 */ | |
d408e2b1 | 31 | STRICT_AHCI, /* delayed DMA engine start */ |
904c04fe RZ |
32 | }; |
33 | ||
34 | static struct platform_device_id ahci_devtype[] = { | |
35 | { | |
36 | .name = "ahci", | |
37 | .driver_data = AHCI, | |
38 | }, { | |
39 | .name = "imx53-ahci", | |
40 | .driver_data = IMX53_AHCI, | |
d408e2b1 BN |
41 | }, { |
42 | .name = "strict-ahci", | |
43 | .driver_data = STRICT_AHCI, | |
904c04fe RZ |
44 | }, { |
45 | /* sentinel */ | |
46 | } | |
47 | }; | |
48 | MODULE_DEVICE_TABLE(platform, ahci_devtype); | |
49 | ||
50 | ||
51 | static const struct ata_port_info ahci_port_info[] = { | |
52 | /* by features */ | |
53 | [AHCI] = { | |
54 | .flags = AHCI_FLAG_COMMON, | |
55 | .pio_mask = ATA_PIO4, | |
56 | .udma_mask = ATA_UDMA6, | |
57 | .port_ops = &ahci_ops, | |
58 | }, | |
59 | [IMX53_AHCI] = { | |
60 | .flags = AHCI_FLAG_COMMON, | |
61 | .pio_mask = ATA_PIO4, | |
62 | .udma_mask = ATA_UDMA6, | |
63 | .port_ops = &ahci_pmp_retry_srst_ops, | |
64 | }, | |
d408e2b1 BN |
65 | [STRICT_AHCI] = { |
66 | AHCI_HFLAGS (AHCI_HFLAG_DELAY_ENGINE), | |
67 | .flags = AHCI_FLAG_COMMON, | |
68 | .pio_mask = ATA_PIO4, | |
69 | .udma_mask = ATA_UDMA6, | |
70 | .port_ops = &ahci_ops, | |
71 | }, | |
904c04fe RZ |
72 | }; |
73 | ||
fad16e7a TH |
74 | static struct scsi_host_template ahci_platform_sht = { |
75 | AHCI_SHT("ahci_platform"), | |
76 | }; | |
77 | ||
941c77fd | 78 | static int __devinit ahci_probe(struct platform_device *pdev) |
1c2a49f6 AV |
79 | { |
80 | struct device *dev = &pdev->dev; | |
00345614 | 81 | struct ahci_platform_data *pdata = dev_get_platdata(dev); |
904c04fe | 82 | const struct platform_device_id *id = platform_get_device_id(pdev); |
ff956135 | 83 | struct ata_port_info pi = ahci_port_info[id ? id->driver_data : 0]; |
1c2a49f6 AV |
84 | const struct ata_port_info *ppi[] = { &pi, NULL }; |
85 | struct ahci_host_priv *hpriv; | |
86 | struct ata_host *host; | |
87 | struct resource *mem; | |
88 | int irq; | |
89 | int n_ports; | |
90 | int i; | |
91 | int rc; | |
92 | ||
93 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
94 | if (!mem) { | |
95 | dev_err(dev, "no mmio space\n"); | |
96 | return -EINVAL; | |
97 | } | |
98 | ||
99 | irq = platform_get_irq(pdev, 0); | |
100 | if (irq <= 0) { | |
101 | dev_err(dev, "no irq\n"); | |
102 | return -EINVAL; | |
103 | } | |
104 | ||
1c2a49f6 AV |
105 | if (pdata && pdata->ata_port_info) |
106 | pi = *pdata->ata_port_info; | |
107 | ||
108 | hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL); | |
109 | if (!hpriv) { | |
08354809 JB |
110 | dev_err(dev, "can't alloc ahci_host_priv\n"); |
111 | return -ENOMEM; | |
1c2a49f6 AV |
112 | } |
113 | ||
114 | hpriv->flags |= (unsigned long)pi.private_data; | |
115 | ||
116 | hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem)); | |
117 | if (!hpriv->mmio) { | |
118 | dev_err(dev, "can't map %pR\n", mem); | |
08354809 JB |
119 | return -ENOMEM; |
120 | } | |
121 | ||
f1e70c2c VK |
122 | hpriv->clk = clk_get(dev, NULL); |
123 | if (IS_ERR(hpriv->clk)) { | |
124 | dev_err(dev, "can't get clock\n"); | |
125 | } else { | |
126 | rc = clk_prepare_enable(hpriv->clk); | |
127 | if (rc) { | |
128 | dev_err(dev, "clock prepare enable failed"); | |
129 | goto free_clk; | |
130 | } | |
131 | } | |
132 | ||
08354809 JB |
133 | /* |
134 | * Some platforms might need to prepare for mmio region access, | |
135 | * which could be done in the following init call. So, the mmio | |
136 | * region shouldn't be accessed before init (if provided) has | |
137 | * returned successfully. | |
138 | */ | |
139 | if (pdata && pdata->init) { | |
140 | rc = pdata->init(dev, hpriv->mmio); | |
141 | if (rc) | |
f1e70c2c | 142 | goto disable_unprepare_clk; |
1c2a49f6 AV |
143 | } |
144 | ||
145 | ahci_save_initial_config(dev, hpriv, | |
146 | pdata ? pdata->force_port_map : 0, | |
147 | pdata ? pdata->mask_port_map : 0); | |
148 | ||
149 | /* prepare host */ | |
150 | if (hpriv->cap & HOST_CAP_NCQ) | |
151 | pi.flags |= ATA_FLAG_NCQ; | |
152 | ||
153 | if (hpriv->cap & HOST_CAP_PMP) | |
154 | pi.flags |= ATA_FLAG_PMP; | |
155 | ||
156 | ahci_set_em_messages(hpriv, &pi); | |
157 | ||
158 | /* CAP.NP sometimes indicate the index of the last enabled | |
159 | * port, at other times, that of the last possible port, so | |
160 | * determining the maximum port number requires looking at | |
161 | * both CAP.NP and port_map. | |
162 | */ | |
163 | n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map)); | |
164 | ||
165 | host = ata_host_alloc_pinfo(dev, ppi, n_ports); | |
166 | if (!host) { | |
167 | rc = -ENOMEM; | |
f1e70c2c | 168 | goto pdata_exit; |
1c2a49f6 AV |
169 | } |
170 | ||
171 | host->private_data = hpriv; | |
172 | ||
173 | if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss) | |
174 | host->flags |= ATA_HOST_PARALLEL_SCAN; | |
175 | else | |
176 | printk(KERN_INFO "ahci: SSS flag set, parallel bus scan disabled\n"); | |
177 | ||
178 | if (pi.flags & ATA_FLAG_EM) | |
179 | ahci_reset_em(host); | |
180 | ||
181 | for (i = 0; i < host->n_ports; i++) { | |
182 | struct ata_port *ap = host->ports[i]; | |
183 | ||
184 | ata_port_desc(ap, "mmio %pR", mem); | |
185 | ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80); | |
186 | ||
1c2a49f6 AV |
187 | /* set enclosure management message type */ |
188 | if (ap->flags & ATA_FLAG_EM) | |
55787183 | 189 | ap->em_message_type = hpriv->em_msg_type; |
1c2a49f6 AV |
190 | |
191 | /* disabled/not-implemented port */ | |
192 | if (!(hpriv->port_map & (1 << i))) | |
193 | ap->ops = &ata_dummy_port_ops; | |
194 | } | |
195 | ||
196 | rc = ahci_reset_controller(host); | |
197 | if (rc) | |
f1e70c2c | 198 | goto pdata_exit; |
1c2a49f6 AV |
199 | |
200 | ahci_init_controller(host); | |
201 | ahci_print_info(host, "platform"); | |
202 | ||
203 | rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED, | |
fad16e7a | 204 | &ahci_platform_sht); |
1c2a49f6 | 205 | if (rc) |
f1e70c2c | 206 | goto pdata_exit; |
1c2a49f6 AV |
207 | |
208 | return 0; | |
f1e70c2c | 209 | pdata_exit: |
1c2a49f6 AV |
210 | if (pdata && pdata->exit) |
211 | pdata->exit(dev); | |
f1e70c2c VK |
212 | disable_unprepare_clk: |
213 | if (!IS_ERR(hpriv->clk)) | |
214 | clk_disable_unprepare(hpriv->clk); | |
215 | free_clk: | |
216 | if (!IS_ERR(hpriv->clk)) | |
217 | clk_put(hpriv->clk); | |
1c2a49f6 AV |
218 | return rc; |
219 | } | |
220 | ||
221 | static int __devexit ahci_remove(struct platform_device *pdev) | |
222 | { | |
223 | struct device *dev = &pdev->dev; | |
00345614 | 224 | struct ahci_platform_data *pdata = dev_get_platdata(dev); |
1c2a49f6 | 225 | struct ata_host *host = dev_get_drvdata(dev); |
f1e70c2c | 226 | struct ahci_host_priv *hpriv = host->private_data; |
1c2a49f6 AV |
227 | |
228 | ata_host_detach(host); | |
229 | ||
230 | if (pdata && pdata->exit) | |
231 | pdata->exit(dev); | |
232 | ||
f1e70c2c VK |
233 | if (!IS_ERR(hpriv->clk)) { |
234 | clk_disable_unprepare(hpriv->clk); | |
235 | clk_put(hpriv->clk); | |
236 | } | |
237 | ||
1c2a49f6 AV |
238 | return 0; |
239 | } | |
240 | ||
29448ec1 | 241 | #ifdef CONFIG_PM_SLEEP |
17ab594f BN |
242 | static int ahci_suspend(struct device *dev) |
243 | { | |
244 | struct ahci_platform_data *pdata = dev_get_platdata(dev); | |
245 | struct ata_host *host = dev_get_drvdata(dev); | |
246 | struct ahci_host_priv *hpriv = host->private_data; | |
247 | void __iomem *mmio = hpriv->mmio; | |
248 | u32 ctl; | |
249 | int rc; | |
250 | ||
251 | if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) { | |
252 | dev_err(dev, "firmware update required for suspend/resume\n"); | |
253 | return -EIO; | |
254 | } | |
255 | ||
256 | /* | |
257 | * AHCI spec rev1.1 section 8.3.3: | |
258 | * Software must disable interrupts prior to requesting a | |
259 | * transition of the HBA to D3 state. | |
260 | */ | |
261 | ctl = readl(mmio + HOST_CTL); | |
262 | ctl &= ~HOST_IRQ_EN; | |
263 | writel(ctl, mmio + HOST_CTL); | |
264 | readl(mmio + HOST_CTL); /* flush */ | |
265 | ||
266 | rc = ata_host_suspend(host, PMSG_SUSPEND); | |
267 | if (rc) | |
268 | return rc; | |
269 | ||
270 | if (pdata && pdata->suspend) | |
271 | return pdata->suspend(dev); | |
f1e70c2c VK |
272 | |
273 | if (!IS_ERR(hpriv->clk)) | |
274 | clk_disable_unprepare(hpriv->clk); | |
275 | ||
17ab594f BN |
276 | return 0; |
277 | } | |
278 | ||
279 | static int ahci_resume(struct device *dev) | |
280 | { | |
281 | struct ahci_platform_data *pdata = dev_get_platdata(dev); | |
282 | struct ata_host *host = dev_get_drvdata(dev); | |
f1e70c2c | 283 | struct ahci_host_priv *hpriv = host->private_data; |
17ab594f BN |
284 | int rc; |
285 | ||
f1e70c2c VK |
286 | if (!IS_ERR(hpriv->clk)) { |
287 | rc = clk_prepare_enable(hpriv->clk); | |
288 | if (rc) { | |
289 | dev_err(dev, "clock prepare enable failed"); | |
290 | return rc; | |
291 | } | |
292 | } | |
293 | ||
17ab594f BN |
294 | if (pdata && pdata->resume) { |
295 | rc = pdata->resume(dev); | |
296 | if (rc) | |
f1e70c2c | 297 | goto disable_unprepare_clk; |
17ab594f BN |
298 | } |
299 | ||
300 | if (dev->power.power_state.event == PM_EVENT_SUSPEND) { | |
301 | rc = ahci_reset_controller(host); | |
302 | if (rc) | |
f1e70c2c | 303 | goto disable_unprepare_clk; |
17ab594f BN |
304 | |
305 | ahci_init_controller(host); | |
306 | } | |
307 | ||
308 | ata_host_resume(host); | |
309 | ||
310 | return 0; | |
f1e70c2c VK |
311 | |
312 | disable_unprepare_clk: | |
313 | if (!IS_ERR(hpriv->clk)) | |
314 | clk_disable_unprepare(hpriv->clk); | |
315 | ||
316 | return rc; | |
17ab594f | 317 | } |
17ab594f BN |
318 | #endif |
319 | ||
18c25ff4 SH |
320 | SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_suspend, ahci_resume); |
321 | ||
02aac316 | 322 | static const struct of_device_id ahci_of_match[] = { |
5f098a3e | 323 | { .compatible = "snps,spear-ahci", }, |
02aac316 RH |
324 | {}, |
325 | }; | |
326 | MODULE_DEVICE_TABLE(of, ahci_of_match); | |
327 | ||
1c2a49f6 | 328 | static struct platform_driver ahci_driver = { |
941c77fd | 329 | .probe = ahci_probe, |
1c2a49f6 AV |
330 | .remove = __devexit_p(ahci_remove), |
331 | .driver = { | |
332 | .name = "ahci", | |
333 | .owner = THIS_MODULE, | |
02aac316 | 334 | .of_match_table = ahci_of_match, |
17ab594f | 335 | .pm = &ahci_pm_ops, |
1c2a49f6 | 336 | }, |
904c04fe | 337 | .id_table = ahci_devtype, |
1c2a49f6 | 338 | }; |
9a99e476 | 339 | module_platform_driver(ahci_driver); |
1c2a49f6 AV |
340 | |
341 | MODULE_DESCRIPTION("AHCI SATA platform driver"); | |
342 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
343 | MODULE_LICENSE("GPL"); | |
344 | MODULE_ALIAS("platform:ahci"); |