2 * Generic platform device PATA driver
4 * Copyright (C) 2006 Paul Mundt
6 * Based on pata_pcmcia:
8 * Copyright 2005-2006 Red Hat Inc <alan@redhat.com>, all rights reserved.
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
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>
22 #include <linux/pata_platform.h>
24 #define DRV_NAME "pata_platform"
25 #define DRV_VERSION "0.1.2"
27 static int pio_mask = 1;
30 * Provide our own set_mode() as we don't want to change anything that has
31 * already been configured..
33 static int pata_platform_set_mode(struct ata_port *ap, struct ata_device **unused)
37 for (i = 0; i < ATA_MAX_DEVICES; i++) {
38 struct ata_device *dev = &ap->device[i];
40 if (ata_dev_enabled(dev)) {
41 /* We don't really care */
42 dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
43 dev->xfer_shift = ATA_SHIFT_PIO;
44 dev->flags |= ATA_DFLAG_PIO;
50 static struct scsi_host_template pata_platform_sht = {
51 .module = THIS_MODULE,
53 .ioctl = ata_scsi_ioctl,
54 .queuecommand = ata_scsi_queuecmd,
55 .can_queue = ATA_DEF_QUEUE,
56 .this_id = ATA_SHT_THIS_ID,
57 .sg_tablesize = LIBATA_MAX_PRD,
58 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
59 .emulated = ATA_SHT_EMULATED,
60 .use_clustering = ATA_SHT_USE_CLUSTERING,
61 .proc_name = DRV_NAME,
62 .dma_boundary = ATA_DMA_BOUNDARY,
63 .slave_configure = ata_scsi_slave_config,
64 .slave_destroy = ata_scsi_slave_destroy,
65 .bios_param = ata_std_bios_param,
68 static struct ata_port_operations pata_platform_port_ops = {
69 .set_mode = pata_platform_set_mode,
71 .port_disable = ata_port_disable,
72 .tf_load = ata_tf_load,
73 .tf_read = ata_tf_read,
74 .check_status = ata_check_status,
75 .exec_command = ata_exec_command,
76 .dev_select = ata_std_dev_select,
78 .freeze = ata_bmdma_freeze,
79 .thaw = ata_bmdma_thaw,
80 .error_handler = ata_bmdma_error_handler,
81 .post_internal_cmd = ata_bmdma_post_internal_cmd,
83 .qc_prep = ata_qc_prep,
84 .qc_issue = ata_qc_issue_prot,
86 .data_xfer = ata_data_xfer_noirq,
88 .irq_handler = ata_interrupt,
89 .irq_clear = ata_bmdma_irq_clear,
91 .irq_ack = ata_irq_ack,
93 .port_start = ata_port_start,
96 static void pata_platform_setup_port(struct ata_ioports *ioaddr,
97 struct pata_platform_info *info)
99 unsigned int shift = 0;
101 /* Fixup the port shift for platforms that need it */
102 if (info && info->ioport_shift)
103 shift = info->ioport_shift;
105 ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift);
106 ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift);
107 ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
108 ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift);
109 ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift);
110 ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift);
111 ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift);
112 ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift);
113 ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift);
114 ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift);
118 * pata_platform_probe - attach a platform interface
119 * @pdev: platform device
121 * Register a platform bus IDE interface. Such interfaces are PIO and we
122 * assume do not support IRQ sharing.
124 * Platform devices are expected to contain 3 resources per port:
126 * - I/O Base (IORESOURCE_IO or IORESOURCE_MEM)
127 * - CTL Base (IORESOURCE_IO or IORESOURCE_MEM)
128 * - IRQ (IORESOURCE_IRQ)
130 * If the base resources are both mem types, the ioremap() is handled
131 * here. For IORESOURCE_IO, it's assumed that there's no remapping
134 static int __devinit pata_platform_probe(struct platform_device *pdev)
136 struct resource *io_res, *ctl_res;
137 struct ata_probe_ent ae;
141 * Simple resource validation ..
143 if (unlikely(pdev->num_resources != 3)) {
144 dev_err(&pdev->dev, "invalid number of resources\n");
149 * Get the I/O base first
151 io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
152 if (io_res == NULL) {
153 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
154 if (unlikely(io_res == NULL))
161 ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
162 if (ctl_res == NULL) {
163 ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
164 if (unlikely(ctl_res == NULL))
171 mmio = (( io_res->flags == IORESOURCE_MEM) &&
172 (ctl_res->flags == IORESOURCE_MEM));
175 * Now that that's out of the way, wire up the port..
177 memset(&ae, 0, sizeof(struct ata_probe_ent));
178 INIT_LIST_HEAD(&ae.node);
180 ae.port_ops = &pata_platform_port_ops;
181 ae.sht = &pata_platform_sht;
183 ae.pio_mask = pio_mask;
184 ae.irq = platform_get_irq(pdev, 0);
186 ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
189 * Handle the MMIO case
192 ae.port[0].cmd_addr = devm_ioremap(&pdev->dev, io_res->start,
193 io_res->end - io_res->start + 1);
194 ae.port[0].ctl_addr = devm_ioremap(&pdev->dev, ctl_res->start,
195 ctl_res->end - ctl_res->start + 1);
197 ae.port[0].cmd_addr = devm_ioport_map(&pdev->dev, io_res->start,
198 io_res->end - io_res->start + 1);
199 ae.port[0].ctl_addr = devm_ioport_map(&pdev->dev, ctl_res->start,
200 ctl_res->end - ctl_res->start + 1);
202 if (!ae.port[0].cmd_addr || !ae.port[0].ctl_addr) {
203 dev_err(&pdev->dev, "failed to map IO/CTL base\n");
207 ae.port[0].altstatus_addr = ae.port[0].ctl_addr;
209 pata_platform_setup_port(&ae.port[0], pdev->dev.platform_data);
211 if (unlikely(ata_device_add(&ae) == 0))
218 * pata_platform_remove - unplug a platform interface
219 * @pdev: platform device
221 * A platform bus ATA device has been unplugged. Perform the needed
222 * cleanup. Also called on module unload for any active devices.
224 static int __devexit pata_platform_remove(struct platform_device *pdev)
226 struct device *dev = &pdev->dev;
227 struct ata_host *host = dev_get_drvdata(dev);
229 ata_host_detach(host);
230 dev_set_drvdata(dev, NULL);
235 static struct platform_driver pata_platform_driver = {
236 .probe = pata_platform_probe,
237 .remove = __devexit_p(pata_platform_remove),
240 .owner = THIS_MODULE,
244 static int __init pata_platform_init(void)
246 return platform_driver_register(&pata_platform_driver);
249 static void __exit pata_platform_exit(void)
251 platform_driver_unregister(&pata_platform_driver);
253 module_init(pata_platform_init);
254 module_exit(pata_platform_exit);
256 module_param(pio_mask, int, 0);
258 MODULE_AUTHOR("Paul Mundt");
259 MODULE_DESCRIPTION("low-level driver for platform device ATA");
260 MODULE_LICENSE("GPL");
261 MODULE_VERSION(DRV_VERSION);