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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 | ||
15 | #include <linux/kernel.h> | |
fbaf666b | 16 | #include <linux/gfp.h> |
1c2a49f6 AV |
17 | #include <linux/module.h> |
18 | #include <linux/init.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/device.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/libata.h> | |
23 | #include <linux/ahci_platform.h> | |
24 | #include "ahci.h" | |
25 | ||
904c04fe RZ |
26 | enum ahci_type { |
27 | AHCI, /* standard platform ahci */ | |
28 | IMX53_AHCI, /* ahci on i.mx53 */ | |
d408e2b1 | 29 | STRICT_AHCI, /* delayed DMA engine start */ |
904c04fe RZ |
30 | }; |
31 | ||
32 | static struct platform_device_id ahci_devtype[] = { | |
33 | { | |
34 | .name = "ahci", | |
35 | .driver_data = AHCI, | |
36 | }, { | |
37 | .name = "imx53-ahci", | |
38 | .driver_data = IMX53_AHCI, | |
d408e2b1 BN |
39 | }, { |
40 | .name = "strict-ahci", | |
41 | .driver_data = STRICT_AHCI, | |
904c04fe RZ |
42 | }, { |
43 | /* sentinel */ | |
44 | } | |
45 | }; | |
46 | MODULE_DEVICE_TABLE(platform, ahci_devtype); | |
47 | ||
48 | ||
49 | static const struct ata_port_info ahci_port_info[] = { | |
50 | /* by features */ | |
51 | [AHCI] = { | |
52 | .flags = AHCI_FLAG_COMMON, | |
53 | .pio_mask = ATA_PIO4, | |
54 | .udma_mask = ATA_UDMA6, | |
55 | .port_ops = &ahci_ops, | |
56 | }, | |
57 | [IMX53_AHCI] = { | |
58 | .flags = AHCI_FLAG_COMMON, | |
59 | .pio_mask = ATA_PIO4, | |
60 | .udma_mask = ATA_UDMA6, | |
61 | .port_ops = &ahci_pmp_retry_srst_ops, | |
62 | }, | |
d408e2b1 BN |
63 | [STRICT_AHCI] = { |
64 | AHCI_HFLAGS (AHCI_HFLAG_DELAY_ENGINE), | |
65 | .flags = AHCI_FLAG_COMMON, | |
66 | .pio_mask = ATA_PIO4, | |
67 | .udma_mask = ATA_UDMA6, | |
68 | .port_ops = &ahci_ops, | |
69 | }, | |
904c04fe RZ |
70 | }; |
71 | ||
fad16e7a TH |
72 | static struct scsi_host_template ahci_platform_sht = { |
73 | AHCI_SHT("ahci_platform"), | |
74 | }; | |
75 | ||
1c2a49f6 AV |
76 | static int __init ahci_probe(struct platform_device *pdev) |
77 | { | |
78 | struct device *dev = &pdev->dev; | |
00345614 | 79 | struct ahci_platform_data *pdata = dev_get_platdata(dev); |
904c04fe | 80 | const struct platform_device_id *id = platform_get_device_id(pdev); |
ff956135 | 81 | struct ata_port_info pi = ahci_port_info[id ? id->driver_data : 0]; |
1c2a49f6 AV |
82 | const struct ata_port_info *ppi[] = { &pi, NULL }; |
83 | struct ahci_host_priv *hpriv; | |
84 | struct ata_host *host; | |
85 | struct resource *mem; | |
86 | int irq; | |
87 | int n_ports; | |
88 | int i; | |
89 | int rc; | |
90 | ||
91 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
92 | if (!mem) { | |
93 | dev_err(dev, "no mmio space\n"); | |
94 | return -EINVAL; | |
95 | } | |
96 | ||
97 | irq = platform_get_irq(pdev, 0); | |
98 | if (irq <= 0) { | |
99 | dev_err(dev, "no irq\n"); | |
100 | return -EINVAL; | |
101 | } | |
102 | ||
1c2a49f6 AV |
103 | if (pdata && pdata->ata_port_info) |
104 | pi = *pdata->ata_port_info; | |
105 | ||
106 | hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL); | |
107 | if (!hpriv) { | |
08354809 JB |
108 | dev_err(dev, "can't alloc ahci_host_priv\n"); |
109 | return -ENOMEM; | |
1c2a49f6 AV |
110 | } |
111 | ||
112 | hpriv->flags |= (unsigned long)pi.private_data; | |
113 | ||
114 | hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem)); | |
115 | if (!hpriv->mmio) { | |
116 | dev_err(dev, "can't map %pR\n", mem); | |
08354809 JB |
117 | return -ENOMEM; |
118 | } | |
119 | ||
120 | /* | |
121 | * Some platforms might need to prepare for mmio region access, | |
122 | * which could be done in the following init call. So, the mmio | |
123 | * region shouldn't be accessed before init (if provided) has | |
124 | * returned successfully. | |
125 | */ | |
126 | if (pdata && pdata->init) { | |
127 | rc = pdata->init(dev, hpriv->mmio); | |
128 | if (rc) | |
129 | return rc; | |
1c2a49f6 AV |
130 | } |
131 | ||
132 | ahci_save_initial_config(dev, hpriv, | |
133 | pdata ? pdata->force_port_map : 0, | |
134 | pdata ? pdata->mask_port_map : 0); | |
135 | ||
136 | /* prepare host */ | |
137 | if (hpriv->cap & HOST_CAP_NCQ) | |
138 | pi.flags |= ATA_FLAG_NCQ; | |
139 | ||
140 | if (hpriv->cap & HOST_CAP_PMP) | |
141 | pi.flags |= ATA_FLAG_PMP; | |
142 | ||
143 | ahci_set_em_messages(hpriv, &pi); | |
144 | ||
145 | /* CAP.NP sometimes indicate the index of the last enabled | |
146 | * port, at other times, that of the last possible port, so | |
147 | * determining the maximum port number requires looking at | |
148 | * both CAP.NP and port_map. | |
149 | */ | |
150 | n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map)); | |
151 | ||
152 | host = ata_host_alloc_pinfo(dev, ppi, n_ports); | |
153 | if (!host) { | |
154 | rc = -ENOMEM; | |
155 | goto err0; | |
156 | } | |
157 | ||
158 | host->private_data = hpriv; | |
159 | ||
160 | if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss) | |
161 | host->flags |= ATA_HOST_PARALLEL_SCAN; | |
162 | else | |
163 | printk(KERN_INFO "ahci: SSS flag set, parallel bus scan disabled\n"); | |
164 | ||
165 | if (pi.flags & ATA_FLAG_EM) | |
166 | ahci_reset_em(host); | |
167 | ||
168 | for (i = 0; i < host->n_ports; i++) { | |
169 | struct ata_port *ap = host->ports[i]; | |
170 | ||
171 | ata_port_desc(ap, "mmio %pR", mem); | |
172 | ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80); | |
173 | ||
1c2a49f6 AV |
174 | /* set enclosure management message type */ |
175 | if (ap->flags & ATA_FLAG_EM) | |
55787183 | 176 | ap->em_message_type = hpriv->em_msg_type; |
1c2a49f6 AV |
177 | |
178 | /* disabled/not-implemented port */ | |
179 | if (!(hpriv->port_map & (1 << i))) | |
180 | ap->ops = &ata_dummy_port_ops; | |
181 | } | |
182 | ||
183 | rc = ahci_reset_controller(host); | |
184 | if (rc) | |
185 | goto err0; | |
186 | ||
187 | ahci_init_controller(host); | |
188 | ahci_print_info(host, "platform"); | |
189 | ||
190 | rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED, | |
fad16e7a | 191 | &ahci_platform_sht); |
1c2a49f6 AV |
192 | if (rc) |
193 | goto err0; | |
194 | ||
195 | return 0; | |
196 | err0: | |
197 | if (pdata && pdata->exit) | |
198 | pdata->exit(dev); | |
199 | return rc; | |
200 | } | |
201 | ||
202 | static int __devexit ahci_remove(struct platform_device *pdev) | |
203 | { | |
204 | struct device *dev = &pdev->dev; | |
00345614 | 205 | struct ahci_platform_data *pdata = dev_get_platdata(dev); |
1c2a49f6 AV |
206 | struct ata_host *host = dev_get_drvdata(dev); |
207 | ||
208 | ata_host_detach(host); | |
209 | ||
210 | if (pdata && pdata->exit) | |
211 | pdata->exit(dev); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
17ab594f BN |
216 | #ifdef CONFIG_PM |
217 | static int ahci_suspend(struct device *dev) | |
218 | { | |
219 | struct ahci_platform_data *pdata = dev_get_platdata(dev); | |
220 | struct ata_host *host = dev_get_drvdata(dev); | |
221 | struct ahci_host_priv *hpriv = host->private_data; | |
222 | void __iomem *mmio = hpriv->mmio; | |
223 | u32 ctl; | |
224 | int rc; | |
225 | ||
226 | if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) { | |
227 | dev_err(dev, "firmware update required for suspend/resume\n"); | |
228 | return -EIO; | |
229 | } | |
230 | ||
231 | /* | |
232 | * AHCI spec rev1.1 section 8.3.3: | |
233 | * Software must disable interrupts prior to requesting a | |
234 | * transition of the HBA to D3 state. | |
235 | */ | |
236 | ctl = readl(mmio + HOST_CTL); | |
237 | ctl &= ~HOST_IRQ_EN; | |
238 | writel(ctl, mmio + HOST_CTL); | |
239 | readl(mmio + HOST_CTL); /* flush */ | |
240 | ||
241 | rc = ata_host_suspend(host, PMSG_SUSPEND); | |
242 | if (rc) | |
243 | return rc; | |
244 | ||
245 | if (pdata && pdata->suspend) | |
246 | return pdata->suspend(dev); | |
247 | return 0; | |
248 | } | |
249 | ||
250 | static int ahci_resume(struct device *dev) | |
251 | { | |
252 | struct ahci_platform_data *pdata = dev_get_platdata(dev); | |
253 | struct ata_host *host = dev_get_drvdata(dev); | |
254 | int rc; | |
255 | ||
256 | if (pdata && pdata->resume) { | |
257 | rc = pdata->resume(dev); | |
258 | if (rc) | |
259 | return rc; | |
260 | } | |
261 | ||
262 | if (dev->power.power_state.event == PM_EVENT_SUSPEND) { | |
263 | rc = ahci_reset_controller(host); | |
264 | if (rc) | |
265 | return rc; | |
266 | ||
267 | ahci_init_controller(host); | |
268 | } | |
269 | ||
270 | ata_host_resume(host); | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | static struct dev_pm_ops ahci_pm_ops = { | |
276 | .suspend = &ahci_suspend, | |
277 | .resume = &ahci_resume, | |
278 | }; | |
279 | #endif | |
280 | ||
02aac316 RH |
281 | static const struct of_device_id ahci_of_match[] = { |
282 | { .compatible = "calxeda,hb-ahci", }, | |
5f098a3e | 283 | { .compatible = "snps,spear-ahci", }, |
02aac316 RH |
284 | {}, |
285 | }; | |
286 | MODULE_DEVICE_TABLE(of, ahci_of_match); | |
287 | ||
1c2a49f6 | 288 | static struct platform_driver ahci_driver = { |
1c2a49f6 AV |
289 | .remove = __devexit_p(ahci_remove), |
290 | .driver = { | |
291 | .name = "ahci", | |
292 | .owner = THIS_MODULE, | |
02aac316 | 293 | .of_match_table = ahci_of_match, |
17ab594f BN |
294 | #ifdef CONFIG_PM |
295 | .pm = &ahci_pm_ops, | |
296 | #endif | |
1c2a49f6 | 297 | }, |
904c04fe | 298 | .id_table = ahci_devtype, |
1c2a49f6 AV |
299 | }; |
300 | ||
301 | static int __init ahci_init(void) | |
302 | { | |
303 | return platform_driver_probe(&ahci_driver, ahci_probe); | |
304 | } | |
305 | module_init(ahci_init); | |
306 | ||
307 | static void __exit ahci_exit(void) | |
308 | { | |
309 | platform_driver_unregister(&ahci_driver); | |
310 | } | |
311 | module_exit(ahci_exit); | |
312 | ||
313 | MODULE_DESCRIPTION("AHCI SATA platform driver"); | |
314 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
315 | MODULE_LICENSE("GPL"); | |
316 | MODULE_ALIAS("platform:ahci"); |