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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 PM |
49 | static struct scsi_host_template pata_platform_sht = { |
50 | .module = THIS_MODULE, | |
51 | .name = DRV_NAME, | |
52 | .ioctl = ata_scsi_ioctl, | |
53 | .queuecommand = ata_scsi_queuecmd, | |
54 | .can_queue = ATA_DEF_QUEUE, | |
55 | .this_id = ATA_SHT_THIS_ID, | |
56 | .sg_tablesize = LIBATA_MAX_PRD, | |
a20c9e82 PM |
57 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, |
58 | .emulated = ATA_SHT_EMULATED, | |
59 | .use_clustering = ATA_SHT_USE_CLUSTERING, | |
60 | .proc_name = DRV_NAME, | |
61 | .dma_boundary = ATA_DMA_BOUNDARY, | |
62 | .slave_configure = ata_scsi_slave_config, | |
c972b60b | 63 | .slave_destroy = ata_scsi_slave_destroy, |
a20c9e82 PM |
64 | .bios_param = ata_std_bios_param, |
65 | }; | |
66 | ||
67 | static struct ata_port_operations pata_platform_port_ops = { | |
68 | .set_mode = pata_platform_set_mode, | |
69 | ||
a20c9e82 PM |
70 | .tf_load = ata_tf_load, |
71 | .tf_read = ata_tf_read, | |
72 | .check_status = ata_check_status, | |
73 | .exec_command = ata_exec_command, | |
74 | .dev_select = ata_std_dev_select, | |
75 | ||
76 | .freeze = ata_bmdma_freeze, | |
77 | .thaw = ata_bmdma_thaw, | |
78 | .error_handler = ata_bmdma_error_handler, | |
79 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | |
570cb62d | 80 | .cable_detect = ata_cable_unknown, |
a20c9e82 PM |
81 | |
82 | .qc_prep = ata_qc_prep, | |
83 | .qc_issue = ata_qc_issue_prot, | |
84 | ||
0d5ff566 | 85 | .data_xfer = ata_data_xfer_noirq, |
a20c9e82 | 86 | |
358f9a77 | 87 | .irq_clear = ata_noop_irq_clear, |
246ce3b6 | 88 | .irq_on = ata_irq_on, |
a20c9e82 PM |
89 | }; |
90 | ||
91 | static void pata_platform_setup_port(struct ata_ioports *ioaddr, | |
cf03613e | 92 | unsigned int shift) |
a20c9e82 | 93 | { |
a20c9e82 | 94 | /* Fixup the port shift for platforms that need it */ |
a20c9e82 PM |
95 | ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift); |
96 | ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift); | |
97 | ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift); | |
98 | ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift); | |
99 | ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift); | |
100 | ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift); | |
101 | ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift); | |
102 | ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift); | |
103 | ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift); | |
104 | ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift); | |
105 | } | |
106 | ||
107 | /** | |
cf03613e AV |
108 | * __pata_platform_probe - attach a platform interface |
109 | * @dev: device | |
110 | * @io_res: Resource representing I/O base | |
111 | * @ctl_res: Resource representing CTL base | |
112 | * @irq_res: Resource representing IRQ and its flags | |
113 | * @ioport_shift: I/O port shift | |
114 | * @__pio_mask: PIO mask | |
a20c9e82 PM |
115 | * |
116 | * Register a platform bus IDE interface. Such interfaces are PIO and we | |
117 | * assume do not support IRQ sharing. | |
118 | * | |
f7fc0ceb | 119 | * Platform devices are expected to contain at least 2 resources per port: |
a20c9e82 PM |
120 | * |
121 | * - I/O Base (IORESOURCE_IO or IORESOURCE_MEM) | |
122 | * - CTL Base (IORESOURCE_IO or IORESOURCE_MEM) | |
f7fc0ceb PM |
123 | * |
124 | * and optionally: | |
125 | * | |
a20c9e82 PM |
126 | * - IRQ (IORESOURCE_IRQ) |
127 | * | |
128 | * If the base resources are both mem types, the ioremap() is handled | |
129 | * here. For IORESOURCE_IO, it's assumed that there's no remapping | |
130 | * necessary. | |
f7fc0ceb PM |
131 | * |
132 | * If no IRQ resource is present, PIO polling mode is used instead. | |
a20c9e82 | 133 | */ |
cf03613e AV |
134 | int __devinit __pata_platform_probe(struct device *dev, |
135 | struct resource *io_res, | |
136 | struct resource *ctl_res, | |
137 | struct resource *irq_res, | |
138 | unsigned int ioport_shift, | |
139 | int __pio_mask) | |
a20c9e82 | 140 | { |
5d728824 TH |
141 | struct ata_host *host; |
142 | struct ata_port *ap; | |
a20c9e82 | 143 | unsigned int mmio; |
cf03613e AV |
144 | int irq = 0; |
145 | int irq_flags = 0; | |
a20c9e82 PM |
146 | |
147 | /* | |
148 | * Check for MMIO | |
149 | */ | |
150 | mmio = (( io_res->flags == IORESOURCE_MEM) && | |
151 | (ctl_res->flags == IORESOURCE_MEM)); | |
152 | ||
f7fc0ceb PM |
153 | /* |
154 | * And the IRQ | |
155 | */ | |
cf03613e AV |
156 | if (irq_res && irq_res->start > 0) { |
157 | irq = irq_res->start; | |
158 | irq_flags = irq_res->flags; | |
159 | } | |
f7fc0ceb | 160 | |
a20c9e82 PM |
161 | /* |
162 | * Now that that's out of the way, wire up the port.. | |
163 | */ | |
cf03613e | 164 | host = ata_host_alloc(dev, 1); |
5d728824 TH |
165 | if (!host) |
166 | return -ENOMEM; | |
167 | ap = host->ports[0]; | |
168 | ||
169 | ap->ops = &pata_platform_port_ops; | |
cf03613e | 170 | ap->pio_mask = __pio_mask; |
5d728824 | 171 | ap->flags |= ATA_FLAG_SLAVE_POSS; |
a20c9e82 | 172 | |
f7fc0ceb PM |
173 | /* |
174 | * Use polling mode if there's no IRQ | |
175 | */ | |
176 | if (!irq) { | |
177 | ap->flags |= ATA_FLAG_PIO_POLLING; | |
178 | ata_port_desc(ap, "no IRQ, using PIO polling"); | |
179 | } | |
180 | ||
a20c9e82 PM |
181 | /* |
182 | * Handle the MMIO case | |
183 | */ | |
184 | if (mmio) { | |
cf03613e | 185 | ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start, |
0d5ff566 | 186 | io_res->end - io_res->start + 1); |
cf03613e | 187 | ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start, |
0d5ff566 | 188 | ctl_res->end - ctl_res->start + 1); |
a20c9e82 | 189 | } else { |
cf03613e | 190 | ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start, |
0d5ff566 | 191 | io_res->end - io_res->start + 1); |
cf03613e | 192 | ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start, |
0d5ff566 TH |
193 | ctl_res->end - ctl_res->start + 1); |
194 | } | |
5d728824 | 195 | if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) { |
cf03613e | 196 | dev_err(dev, "failed to map IO/CTL base\n"); |
0d5ff566 | 197 | return -ENOMEM; |
a20c9e82 PM |
198 | } |
199 | ||
5d728824 | 200 | ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr; |
a20c9e82 | 201 | |
cf03613e | 202 | pata_platform_setup_port(&ap->ioaddr, ioport_shift); |
a20c9e82 | 203 | |
cbcdd875 TH |
204 | ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport", |
205 | (unsigned long long)io_res->start, | |
206 | (unsigned long long)ctl_res->start); | |
207 | ||
5d728824 | 208 | /* activate */ |
f7fc0ceb | 209 | return ata_host_activate(host, irq, irq ? ata_interrupt : NULL, |
cf03613e | 210 | irq_flags, &pata_platform_sht); |
a20c9e82 | 211 | } |
cf03613e | 212 | EXPORT_SYMBOL_GPL(__pata_platform_probe); |
a20c9e82 PM |
213 | |
214 | /** | |
cf03613e AV |
215 | * __pata_platform_remove - unplug a platform interface |
216 | * @dev: device | |
a20c9e82 PM |
217 | * |
218 | * A platform bus ATA device has been unplugged. Perform the needed | |
219 | * cleanup. Also called on module unload for any active devices. | |
220 | */ | |
cf03613e | 221 | int __devexit __pata_platform_remove(struct device *dev) |
a20c9e82 | 222 | { |
a20c9e82 PM |
223 | struct ata_host *host = dev_get_drvdata(dev); |
224 | ||
1a68ff13 | 225 | ata_host_detach(host); |
a20c9e82 PM |
226 | |
227 | return 0; | |
228 | } | |
cf03613e AV |
229 | EXPORT_SYMBOL_GPL(__pata_platform_remove); |
230 | ||
231 | static int __devinit pata_platform_probe(struct platform_device *pdev) | |
232 | { | |
233 | struct resource *io_res; | |
234 | struct resource *ctl_res; | |
235 | struct resource *irq_res; | |
236 | struct pata_platform_info *pp_info = pdev->dev.platform_data; | |
237 | ||
238 | /* | |
239 | * Simple resource validation .. | |
240 | */ | |
241 | if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) { | |
242 | dev_err(&pdev->dev, "invalid number of resources\n"); | |
243 | return -EINVAL; | |
244 | } | |
245 | ||
246 | /* | |
247 | * Get the I/O base first | |
248 | */ | |
249 | io_res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
250 | if (io_res == NULL) { | |
251 | io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
252 | if (unlikely(io_res == NULL)) | |
253 | return -EINVAL; | |
254 | } | |
255 | ||
256 | /* | |
257 | * Then the CTL base | |
258 | */ | |
259 | ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1); | |
260 | if (ctl_res == NULL) { | |
261 | ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
262 | if (unlikely(ctl_res == NULL)) | |
263 | return -EINVAL; | |
264 | } | |
265 | ||
266 | /* | |
267 | * And the IRQ | |
268 | */ | |
269 | irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
270 | if (irq_res) | |
271 | irq_res->flags = pp_info ? pp_info->irq_flags : 0; | |
272 | ||
273 | return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res, | |
274 | pp_info ? pp_info->ioport_shift : 0, | |
275 | pio_mask); | |
276 | } | |
277 | ||
278 | static int __devexit pata_platform_remove(struct platform_device *pdev) | |
279 | { | |
280 | return __pata_platform_remove(&pdev->dev); | |
281 | } | |
a20c9e82 PM |
282 | |
283 | static struct platform_driver pata_platform_driver = { | |
284 | .probe = pata_platform_probe, | |
285 | .remove = __devexit_p(pata_platform_remove), | |
286 | .driver = { | |
287 | .name = DRV_NAME, | |
288 | .owner = THIS_MODULE, | |
289 | }, | |
290 | }; | |
291 | ||
292 | static int __init pata_platform_init(void) | |
293 | { | |
294 | return platform_driver_register(&pata_platform_driver); | |
295 | } | |
296 | ||
297 | static void __exit pata_platform_exit(void) | |
298 | { | |
299 | platform_driver_unregister(&pata_platform_driver); | |
300 | } | |
301 | module_init(pata_platform_init); | |
302 | module_exit(pata_platform_exit); | |
303 | ||
304 | module_param(pio_mask, int, 0); | |
305 | ||
306 | MODULE_AUTHOR("Paul Mundt"); | |
307 | MODULE_DESCRIPTION("low-level driver for platform device ATA"); | |
308 | MODULE_LICENSE("GPL"); | |
309 | MODULE_VERSION(DRV_VERSION); |