Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Generic platform device PATA driver |
| 3 | * |
Paul Mundt | f7fc0ce | 2007-11-08 11:15:21 +0900 | [diff] [blame] | 4 | * Copyright (C) 2006 - 2007 Paul Mundt |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 5 | * |
| 6 | * Based on pata_pcmcia: |
| 7 | * |
Alan Cox | ab77163 | 2008-10-27 15:09:10 +0000 | [diff] [blame] | 8 | * Copyright 2005-2006 Red Hat Inc, all rights reserved. |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 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> |
Jeff Garzik | 0a87e3e | 2008-02-01 18:02:30 -0500 | [diff] [blame] | 22 | #include <linux/ata_platform.h> |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 23 | |
| 24 | #define DRV_NAME "pata_platform" |
Paul Mundt | f7fc0ce | 2007-11-08 11:15:21 +0900 | [diff] [blame] | 25 | #define DRV_VERSION "1.2" |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 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 | */ |
Tejun Heo | 0260731 | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 33 | static int pata_platform_set_mode(struct ata_link *link, struct ata_device **unused) |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 34 | { |
Tejun Heo | f58229f | 2007-08-06 18:36:23 +0900 | [diff] [blame] | 35 | struct ata_device *dev; |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 36 | |
Tejun Heo | 1eca436 | 2008-11-03 20:03:17 +0900 | [diff] [blame] | 37 | ata_for_each_dev(dev, link, ENABLED) { |
| 38 | /* We don't really care */ |
| 39 | dev->pio_mode = dev->xfer_mode = XFER_PIO_0; |
| 40 | dev->xfer_shift = ATA_SHIFT_PIO; |
| 41 | dev->flags |= ATA_DFLAG_PIO; |
| 42 | ata_dev_printk(dev, KERN_INFO, "configured for PIO\n"); |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 43 | } |
Al Viro | 161c888 | 2007-01-30 13:23:45 +0000 | [diff] [blame] | 44 | return 0; |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 45 | } |
| 46 | |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 47 | static struct scsi_host_template pata_platform_sht = { |
Tejun Heo | 68d1d07 | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 48 | ATA_PIO_SHT(DRV_NAME), |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 49 | }; |
| 50 | |
| 51 | static struct ata_port_operations pata_platform_port_ops = { |
Tejun Heo | 029cfd6 | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 52 | .inherits = &ata_sff_port_ops, |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 53 | .sff_data_xfer = ata_sff_data_xfer_noirq, |
Tejun Heo | 029cfd6 | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 54 | .cable_detect = ata_cable_unknown, |
| 55 | .set_mode = pata_platform_set_mode, |
| 56 | .port_start = ATA_OP_NULL, |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 57 | }; |
| 58 | |
| 59 | static void pata_platform_setup_port(struct ata_ioports *ioaddr, |
Anton Vorontsov | cf03613 | 2008-01-09 22:10:22 +0300 | [diff] [blame] | 60 | unsigned int shift) |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 61 | { |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 62 | /* Fixup the port shift for platforms that need it */ |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 63 | ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift); |
| 64 | ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift); |
| 65 | ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift); |
| 66 | ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift); |
| 67 | ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift); |
| 68 | ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift); |
| 69 | ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift); |
| 70 | ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift); |
| 71 | ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift); |
| 72 | ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift); |
| 73 | } |
| 74 | |
| 75 | /** |
Anton Vorontsov | cf03613 | 2008-01-09 22:10:22 +0300 | [diff] [blame] | 76 | * __pata_platform_probe - attach a platform interface |
| 77 | * @dev: device |
| 78 | * @io_res: Resource representing I/O base |
| 79 | * @ctl_res: Resource representing CTL base |
| 80 | * @irq_res: Resource representing IRQ and its flags |
| 81 | * @ioport_shift: I/O port shift |
| 82 | * @__pio_mask: PIO mask |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 83 | * |
| 84 | * Register a platform bus IDE interface. Such interfaces are PIO and we |
| 85 | * assume do not support IRQ sharing. |
| 86 | * |
Paul Mundt | f7fc0ce | 2007-11-08 11:15:21 +0900 | [diff] [blame] | 87 | * Platform devices are expected to contain at least 2 resources per port: |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 88 | * |
| 89 | * - I/O Base (IORESOURCE_IO or IORESOURCE_MEM) |
| 90 | * - CTL Base (IORESOURCE_IO or IORESOURCE_MEM) |
Paul Mundt | f7fc0ce | 2007-11-08 11:15:21 +0900 | [diff] [blame] | 91 | * |
| 92 | * and optionally: |
| 93 | * |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 94 | * - IRQ (IORESOURCE_IRQ) |
| 95 | * |
| 96 | * If the base resources are both mem types, the ioremap() is handled |
| 97 | * here. For IORESOURCE_IO, it's assumed that there's no remapping |
| 98 | * necessary. |
Paul Mundt | f7fc0ce | 2007-11-08 11:15:21 +0900 | [diff] [blame] | 99 | * |
| 100 | * If no IRQ resource is present, PIO polling mode is used instead. |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 101 | */ |
Anton Vorontsov | cf03613 | 2008-01-09 22:10:22 +0300 | [diff] [blame] | 102 | int __devinit __pata_platform_probe(struct device *dev, |
| 103 | struct resource *io_res, |
| 104 | struct resource *ctl_res, |
| 105 | struct resource *irq_res, |
| 106 | unsigned int ioport_shift, |
| 107 | int __pio_mask) |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 108 | { |
Tejun Heo | 5d72882 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 109 | struct ata_host *host; |
| 110 | struct ata_port *ap; |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 111 | unsigned int mmio; |
Anton Vorontsov | cf03613 | 2008-01-09 22:10:22 +0300 | [diff] [blame] | 112 | int irq = 0; |
| 113 | int irq_flags = 0; |
| 114 | |
| 115 | /* |
| 116 | * Check for MMIO |
| 117 | */ |
| 118 | mmio = (( io_res->flags == IORESOURCE_MEM) && |
| 119 | (ctl_res->flags == IORESOURCE_MEM)); |
| 120 | |
| 121 | /* |
| 122 | * And the IRQ |
| 123 | */ |
| 124 | if (irq_res && irq_res->start > 0) { |
| 125 | irq = irq_res->start; |
| 126 | irq_flags = irq_res->flags; |
| 127 | } |
| 128 | |
| 129 | /* |
| 130 | * Now that that's out of the way, wire up the port.. |
| 131 | */ |
| 132 | host = ata_host_alloc(dev, 1); |
| 133 | if (!host) |
| 134 | return -ENOMEM; |
| 135 | ap = host->ports[0]; |
| 136 | |
| 137 | ap->ops = &pata_platform_port_ops; |
| 138 | ap->pio_mask = __pio_mask; |
| 139 | ap->flags |= ATA_FLAG_SLAVE_POSS; |
| 140 | |
| 141 | /* |
| 142 | * Use polling mode if there's no IRQ |
| 143 | */ |
| 144 | if (!irq) { |
| 145 | ap->flags |= ATA_FLAG_PIO_POLLING; |
| 146 | ata_port_desc(ap, "no IRQ, using PIO polling"); |
| 147 | } |
| 148 | |
| 149 | /* |
| 150 | * Handle the MMIO case |
| 151 | */ |
| 152 | if (mmio) { |
| 153 | ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start, |
| 154 | io_res->end - io_res->start + 1); |
| 155 | ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start, |
| 156 | ctl_res->end - ctl_res->start + 1); |
| 157 | } else { |
| 158 | ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start, |
| 159 | io_res->end - io_res->start + 1); |
| 160 | ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start, |
| 161 | ctl_res->end - ctl_res->start + 1); |
| 162 | } |
| 163 | if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) { |
| 164 | dev_err(dev, "failed to map IO/CTL base\n"); |
| 165 | return -ENOMEM; |
| 166 | } |
| 167 | |
| 168 | ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr; |
| 169 | |
| 170 | pata_platform_setup_port(&ap->ioaddr, ioport_shift); |
| 171 | |
| 172 | ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport", |
| 173 | (unsigned long long)io_res->start, |
| 174 | (unsigned long long)ctl_res->start); |
| 175 | |
| 176 | /* activate */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 177 | return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL, |
Anton Vorontsov | cf03613 | 2008-01-09 22:10:22 +0300 | [diff] [blame] | 178 | irq_flags, &pata_platform_sht); |
| 179 | } |
| 180 | EXPORT_SYMBOL_GPL(__pata_platform_probe); |
| 181 | |
| 182 | /** |
| 183 | * __pata_platform_remove - unplug a platform interface |
| 184 | * @dev: device |
| 185 | * |
| 186 | * A platform bus ATA device has been unplugged. Perform the needed |
| 187 | * cleanup. Also called on module unload for any active devices. |
| 188 | */ |
| 189 | int __devexit __pata_platform_remove(struct device *dev) |
| 190 | { |
| 191 | struct ata_host *host = dev_get_drvdata(dev); |
| 192 | |
| 193 | ata_host_detach(host); |
| 194 | |
| 195 | return 0; |
| 196 | } |
| 197 | EXPORT_SYMBOL_GPL(__pata_platform_remove); |
| 198 | |
| 199 | static int __devinit pata_platform_probe(struct platform_device *pdev) |
| 200 | { |
| 201 | struct resource *io_res; |
| 202 | struct resource *ctl_res; |
| 203 | struct resource *irq_res; |
| 204 | struct pata_platform_info *pp_info = pdev->dev.platform_data; |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 205 | |
| 206 | /* |
| 207 | * Simple resource validation .. |
| 208 | */ |
Paul Mundt | f7fc0ce | 2007-11-08 11:15:21 +0900 | [diff] [blame] | 209 | if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) { |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 210 | dev_err(&pdev->dev, "invalid number of resources\n"); |
| 211 | return -EINVAL; |
| 212 | } |
| 213 | |
| 214 | /* |
| 215 | * Get the I/O base first |
| 216 | */ |
| 217 | io_res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| 218 | if (io_res == NULL) { |
| 219 | io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 220 | if (unlikely(io_res == NULL)) |
| 221 | return -EINVAL; |
| 222 | } |
| 223 | |
| 224 | /* |
| 225 | * Then the CTL base |
| 226 | */ |
| 227 | ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1); |
| 228 | if (ctl_res == NULL) { |
| 229 | ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| 230 | if (unlikely(ctl_res == NULL)) |
| 231 | return -EINVAL; |
| 232 | } |
| 233 | |
| 234 | /* |
Paul Mundt | f7fc0ce | 2007-11-08 11:15:21 +0900 | [diff] [blame] | 235 | * And the IRQ |
| 236 | */ |
Anton Vorontsov | cf03613 | 2008-01-09 22:10:22 +0300 | [diff] [blame] | 237 | irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 238 | if (irq_res) |
| 239 | irq_res->flags = pp_info ? pp_info->irq_flags : 0; |
Paul Mundt | f7fc0ce | 2007-11-08 11:15:21 +0900 | [diff] [blame] | 240 | |
Anton Vorontsov | cf03613 | 2008-01-09 22:10:22 +0300 | [diff] [blame] | 241 | return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res, |
| 242 | pp_info ? pp_info->ioport_shift : 0, |
| 243 | pio_mask); |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 244 | } |
| 245 | |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 246 | static int __devexit pata_platform_remove(struct platform_device *pdev) |
| 247 | { |
Anton Vorontsov | cf03613 | 2008-01-09 22:10:22 +0300 | [diff] [blame] | 248 | return __pata_platform_remove(&pdev->dev); |
Paul Mundt | a20c9e8 | 2006-10-27 19:08:48 -0700 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | static struct platform_driver pata_platform_driver = { |
| 252 | .probe = pata_platform_probe, |
| 253 | .remove = __devexit_p(pata_platform_remove), |
| 254 | .driver = { |
| 255 | .name = DRV_NAME, |
| 256 | .owner = THIS_MODULE, |
| 257 | }, |
| 258 | }; |
| 259 | |
| 260 | static int __init pata_platform_init(void) |
| 261 | { |
| 262 | return platform_driver_register(&pata_platform_driver); |
| 263 | } |
| 264 | |
| 265 | static void __exit pata_platform_exit(void) |
| 266 | { |
| 267 | platform_driver_unregister(&pata_platform_driver); |
| 268 | } |
| 269 | module_init(pata_platform_init); |
| 270 | module_exit(pata_platform_exit); |
| 271 | |
| 272 | module_param(pio_mask, int, 0); |
| 273 | |
| 274 | MODULE_AUTHOR("Paul Mundt"); |
| 275 | MODULE_DESCRIPTION("low-level driver for platform device ATA"); |
| 276 | MODULE_LICENSE("GPL"); |
| 277 | MODULE_VERSION(DRV_VERSION); |
Kay Sievers | 458622f | 2008-04-18 13:41:57 -0700 | [diff] [blame] | 278 | MODULE_ALIAS("platform:" DRV_NAME); |