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a20c9e82 PM |
1 | /* |
2 | * Generic platform device PATA driver | |
3 | * | |
f7fc0ceb | 4 | * Copyright (C) 2006 - 2007 Paul Mundt |
a20c9e82 PM |
5 | * |
6 | * Based on pata_pcmcia: | |
7 | * | |
8 | * Copyright 2005-2006 Red Hat Inc <alan@redhat.com>, all rights reserved. | |
9 | * | |
10 | * This file is subject to the terms and conditions of the GNU General Public | |
11 | * License. See the file "COPYING" in the main directory of this archive | |
12 | * for more details. | |
13 | */ | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/blkdev.h> | |
18 | #include <scsi/scsi_host.h> | |
19 | #include <linux/ata.h> | |
20 | #include <linux/libata.h> | |
21 | #include <linux/platform_device.h> | |
0a87e3e9 | 22 | #include <linux/ata_platform.h> |
a20c9e82 PM |
23 | |
24 | #define DRV_NAME "pata_platform" | |
f7fc0ceb | 25 | #define DRV_VERSION "1.2" |
a20c9e82 PM |
26 | |
27 | static int pio_mask = 1; | |
28 | ||
29 | /* | |
30 | * Provide our own set_mode() as we don't want to change anything that has | |
31 | * already been configured.. | |
32 | */ | |
0260731f | 33 | static int pata_platform_set_mode(struct ata_link *link, struct ata_device **unused) |
a20c9e82 | 34 | { |
f58229f8 | 35 | struct ata_device *dev; |
a20c9e82 | 36 | |
0260731f | 37 | ata_link_for_each_dev(dev, link) { |
a20c9e82 PM |
38 | if (ata_dev_enabled(dev)) { |
39 | /* We don't really care */ | |
40 | dev->pio_mode = dev->xfer_mode = XFER_PIO_0; | |
41 | dev->xfer_shift = ATA_SHIFT_PIO; | |
42 | dev->flags |= ATA_DFLAG_PIO; | |
e852f705 | 43 | ata_dev_printk(dev, KERN_INFO, "configured for PIO\n"); |
a20c9e82 PM |
44 | } |
45 | } | |
161c888b | 46 | return 0; |
a20c9e82 PM |
47 | } |
48 | ||
a20c9e82 | 49 | static struct scsi_host_template pata_platform_sht = { |
68d1d07b | 50 | ATA_PIO_SHT(DRV_NAME), |
a20c9e82 PM |
51 | }; |
52 | ||
53 | static struct ata_port_operations pata_platform_port_ops = { | |
029cfd6b | 54 | .inherits = &ata_sff_port_ops, |
5682ed33 | 55 | .sff_data_xfer = ata_sff_data_xfer_noirq, |
029cfd6b TH |
56 | .cable_detect = ata_cable_unknown, |
57 | .set_mode = pata_platform_set_mode, | |
58 | .port_start = ATA_OP_NULL, | |
a20c9e82 PM |
59 | }; |
60 | ||
61 | static void pata_platform_setup_port(struct ata_ioports *ioaddr, | |
cf03613e | 62 | unsigned int shift) |
a20c9e82 | 63 | { |
a20c9e82 | 64 | /* Fixup the port shift for platforms that need it */ |
a20c9e82 PM |
65 | ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift); |
66 | ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift); | |
67 | ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift); | |
68 | ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift); | |
69 | ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift); | |
70 | ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift); | |
71 | ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift); | |
72 | ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift); | |
73 | ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift); | |
74 | ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift); | |
75 | } | |
76 | ||
77 | /** | |
cf03613e AV |
78 | * __pata_platform_probe - attach a platform interface |
79 | * @dev: device | |
80 | * @io_res: Resource representing I/O base | |
81 | * @ctl_res: Resource representing CTL base | |
82 | * @irq_res: Resource representing IRQ and its flags | |
83 | * @ioport_shift: I/O port shift | |
84 | * @__pio_mask: PIO mask | |
a20c9e82 PM |
85 | * |
86 | * Register a platform bus IDE interface. Such interfaces are PIO and we | |
87 | * assume do not support IRQ sharing. | |
88 | * | |
f7fc0ceb | 89 | * Platform devices are expected to contain at least 2 resources per port: |
a20c9e82 PM |
90 | * |
91 | * - I/O Base (IORESOURCE_IO or IORESOURCE_MEM) | |
92 | * - CTL Base (IORESOURCE_IO or IORESOURCE_MEM) | |
f7fc0ceb PM |
93 | * |
94 | * and optionally: | |
95 | * | |
a20c9e82 PM |
96 | * - IRQ (IORESOURCE_IRQ) |
97 | * | |
98 | * If the base resources are both mem types, the ioremap() is handled | |
99 | * here. For IORESOURCE_IO, it's assumed that there's no remapping | |
100 | * necessary. | |
f7fc0ceb PM |
101 | * |
102 | * If no IRQ resource is present, PIO polling mode is used instead. | |
a20c9e82 | 103 | */ |
cf03613e AV |
104 | int __devinit __pata_platform_probe(struct device *dev, |
105 | struct resource *io_res, | |
106 | struct resource *ctl_res, | |
107 | struct resource *irq_res, | |
108 | unsigned int ioport_shift, | |
109 | int __pio_mask) | |
a20c9e82 | 110 | { |
5d728824 TH |
111 | struct ata_host *host; |
112 | struct ata_port *ap; | |
a20c9e82 | 113 | unsigned int mmio; |
cf03613e AV |
114 | int irq = 0; |
115 | int irq_flags = 0; | |
a20c9e82 PM |
116 | |
117 | /* | |
118 | * Check for MMIO | |
119 | */ | |
120 | mmio = (( io_res->flags == IORESOURCE_MEM) && | |
121 | (ctl_res->flags == IORESOURCE_MEM)); | |
122 | ||
f7fc0ceb PM |
123 | /* |
124 | * And the IRQ | |
125 | */ | |
cf03613e AV |
126 | if (irq_res && irq_res->start > 0) { |
127 | irq = irq_res->start; | |
128 | irq_flags = irq_res->flags; | |
129 | } | |
f7fc0ceb | 130 | |
a20c9e82 PM |
131 | /* |
132 | * Now that that's out of the way, wire up the port.. | |
133 | */ | |
cf03613e | 134 | host = ata_host_alloc(dev, 1); |
5d728824 TH |
135 | if (!host) |
136 | return -ENOMEM; | |
137 | ap = host->ports[0]; | |
138 | ||
139 | ap->ops = &pata_platform_port_ops; | |
cf03613e | 140 | ap->pio_mask = __pio_mask; |
5d728824 | 141 | ap->flags |= ATA_FLAG_SLAVE_POSS; |
a20c9e82 | 142 | |
f7fc0ceb PM |
143 | /* |
144 | * Use polling mode if there's no IRQ | |
145 | */ | |
146 | if (!irq) { | |
147 | ap->flags |= ATA_FLAG_PIO_POLLING; | |
148 | ata_port_desc(ap, "no IRQ, using PIO polling"); | |
149 | } | |
150 | ||
a20c9e82 PM |
151 | /* |
152 | * Handle the MMIO case | |
153 | */ | |
154 | if (mmio) { | |
cf03613e | 155 | ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start, |
0d5ff566 | 156 | io_res->end - io_res->start + 1); |
cf03613e | 157 | ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start, |
0d5ff566 | 158 | ctl_res->end - ctl_res->start + 1); |
a20c9e82 | 159 | } else { |
cf03613e | 160 | ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start, |
0d5ff566 | 161 | io_res->end - io_res->start + 1); |
cf03613e | 162 | ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start, |
0d5ff566 TH |
163 | ctl_res->end - ctl_res->start + 1); |
164 | } | |
5d728824 | 165 | if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) { |
cf03613e | 166 | dev_err(dev, "failed to map IO/CTL base\n"); |
0d5ff566 | 167 | return -ENOMEM; |
a20c9e82 PM |
168 | } |
169 | ||
5d728824 | 170 | ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr; |
a20c9e82 | 171 | |
cf03613e | 172 | pata_platform_setup_port(&ap->ioaddr, ioport_shift); |
a20c9e82 | 173 | |
cbcdd875 TH |
174 | ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport", |
175 | (unsigned long long)io_res->start, | |
176 | (unsigned long long)ctl_res->start); | |
177 | ||
5d728824 | 178 | /* activate */ |
9363c382 | 179 | return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL, |
cf03613e | 180 | irq_flags, &pata_platform_sht); |
a20c9e82 | 181 | } |
cf03613e | 182 | EXPORT_SYMBOL_GPL(__pata_platform_probe); |
a20c9e82 PM |
183 | |
184 | /** | |
cf03613e AV |
185 | * __pata_platform_remove - unplug a platform interface |
186 | * @dev: device | |
a20c9e82 PM |
187 | * |
188 | * A platform bus ATA device has been unplugged. Perform the needed | |
189 | * cleanup. Also called on module unload for any active devices. | |
190 | */ | |
cf03613e | 191 | int __devexit __pata_platform_remove(struct device *dev) |
a20c9e82 | 192 | { |
a20c9e82 PM |
193 | struct ata_host *host = dev_get_drvdata(dev); |
194 | ||
1a68ff13 | 195 | ata_host_detach(host); |
a20c9e82 PM |
196 | |
197 | return 0; | |
198 | } | |
cf03613e AV |
199 | EXPORT_SYMBOL_GPL(__pata_platform_remove); |
200 | ||
201 | static int __devinit pata_platform_probe(struct platform_device *pdev) | |
202 | { | |
203 | struct resource *io_res; | |
204 | struct resource *ctl_res; | |
205 | struct resource *irq_res; | |
206 | struct pata_platform_info *pp_info = pdev->dev.platform_data; | |
207 | ||
208 | /* | |
209 | * Simple resource validation .. | |
210 | */ | |
211 | if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) { | |
212 | dev_err(&pdev->dev, "invalid number of resources\n"); | |
213 | return -EINVAL; | |
214 | } | |
215 | ||
216 | /* | |
217 | * Get the I/O base first | |
218 | */ | |
219 | io_res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
220 | if (io_res == NULL) { | |
221 | io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
222 | if (unlikely(io_res == NULL)) | |
223 | return -EINVAL; | |
224 | } | |
225 | ||
226 | /* | |
227 | * Then the CTL base | |
228 | */ | |
229 | ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1); | |
230 | if (ctl_res == NULL) { | |
231 | ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
232 | if (unlikely(ctl_res == NULL)) | |
233 | return -EINVAL; | |
234 | } | |
235 | ||
236 | /* | |
237 | * And the IRQ | |
238 | */ | |
239 | irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
240 | if (irq_res) | |
241 | irq_res->flags = pp_info ? pp_info->irq_flags : 0; | |
242 | ||
243 | return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res, | |
244 | pp_info ? pp_info->ioport_shift : 0, | |
245 | pio_mask); | |
246 | } | |
247 | ||
248 | static int __devexit pata_platform_remove(struct platform_device *pdev) | |
249 | { | |
250 | return __pata_platform_remove(&pdev->dev); | |
251 | } | |
a20c9e82 PM |
252 | |
253 | static struct platform_driver pata_platform_driver = { | |
254 | .probe = pata_platform_probe, | |
255 | .remove = __devexit_p(pata_platform_remove), | |
256 | .driver = { | |
257 | .name = DRV_NAME, | |
258 | .owner = THIS_MODULE, | |
259 | }, | |
260 | }; | |
261 | ||
262 | static int __init pata_platform_init(void) | |
263 | { | |
264 | return platform_driver_register(&pata_platform_driver); | |
265 | } | |
266 | ||
267 | static void __exit pata_platform_exit(void) | |
268 | { | |
269 | platform_driver_unregister(&pata_platform_driver); | |
270 | } | |
271 | module_init(pata_platform_init); | |
272 | module_exit(pata_platform_exit); | |
273 | ||
274 | module_param(pio_mask, int, 0); | |
275 | ||
276 | MODULE_AUTHOR("Paul Mundt"); | |
277 | MODULE_DESCRIPTION("low-level driver for platform device ATA"); | |
278 | MODULE_LICENSE("GPL"); | |
279 | MODULE_VERSION(DRV_VERSION); | |
458622fc | 280 | MODULE_ALIAS("platform:" DRV_NAME); |