Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 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> |
Tejun Heo | fbaf666 | 2010-03-30 02:52:43 +0900 | [diff] [blame] | 16 | #include <linux/gfp.h> |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 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 | |
Richard Zhu | 904c04f | 2011-09-28 15:41:54 +0800 | [diff] [blame] | 26 | enum ahci_type { |
| 27 | AHCI, /* standard platform ahci */ |
| 28 | IMX53_AHCI, /* ahci on i.mx53 */ |
| 29 | }; |
| 30 | |
| 31 | static struct platform_device_id ahci_devtype[] = { |
| 32 | { |
| 33 | .name = "ahci", |
| 34 | .driver_data = AHCI, |
| 35 | }, { |
| 36 | .name = "imx53-ahci", |
| 37 | .driver_data = IMX53_AHCI, |
| 38 | }, { |
| 39 | /* sentinel */ |
| 40 | } |
| 41 | }; |
| 42 | MODULE_DEVICE_TABLE(platform, ahci_devtype); |
| 43 | |
| 44 | |
| 45 | static const struct ata_port_info ahci_port_info[] = { |
| 46 | /* by features */ |
| 47 | [AHCI] = { |
| 48 | .flags = AHCI_FLAG_COMMON, |
| 49 | .pio_mask = ATA_PIO4, |
| 50 | .udma_mask = ATA_UDMA6, |
| 51 | .port_ops = &ahci_ops, |
| 52 | }, |
| 53 | [IMX53_AHCI] = { |
| 54 | .flags = AHCI_FLAG_COMMON, |
| 55 | .pio_mask = ATA_PIO4, |
| 56 | .udma_mask = ATA_UDMA6, |
| 57 | .port_ops = &ahci_pmp_retry_srst_ops, |
| 58 | }, |
| 59 | }; |
| 60 | |
Tejun Heo | fad16e7 | 2010-09-21 09:25:48 +0200 | [diff] [blame] | 61 | static struct scsi_host_template ahci_platform_sht = { |
| 62 | AHCI_SHT("ahci_platform"), |
| 63 | }; |
| 64 | |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 65 | static int __init ahci_probe(struct platform_device *pdev) |
| 66 | { |
| 67 | struct device *dev = &pdev->dev; |
| 68 | struct ahci_platform_data *pdata = dev->platform_data; |
Richard Zhu | 904c04f | 2011-09-28 15:41:54 +0800 | [diff] [blame] | 69 | const struct platform_device_id *id = platform_get_device_id(pdev); |
| 70 | struct ata_port_info pi = ahci_port_info[id->driver_data]; |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 71 | const struct ata_port_info *ppi[] = { &pi, NULL }; |
| 72 | struct ahci_host_priv *hpriv; |
| 73 | struct ata_host *host; |
| 74 | struct resource *mem; |
| 75 | int irq; |
| 76 | int n_ports; |
| 77 | int i; |
| 78 | int rc; |
| 79 | |
| 80 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 81 | if (!mem) { |
| 82 | dev_err(dev, "no mmio space\n"); |
| 83 | return -EINVAL; |
| 84 | } |
| 85 | |
| 86 | irq = platform_get_irq(pdev, 0); |
| 87 | if (irq <= 0) { |
| 88 | dev_err(dev, "no irq\n"); |
| 89 | return -EINVAL; |
| 90 | } |
| 91 | |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 92 | if (pdata && pdata->ata_port_info) |
| 93 | pi = *pdata->ata_port_info; |
| 94 | |
| 95 | hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL); |
| 96 | if (!hpriv) { |
Jassi Brar | 0835480 | 2010-06-25 18:21:19 +0900 | [diff] [blame] | 97 | dev_err(dev, "can't alloc ahci_host_priv\n"); |
| 98 | return -ENOMEM; |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | hpriv->flags |= (unsigned long)pi.private_data; |
| 102 | |
| 103 | hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem)); |
| 104 | if (!hpriv->mmio) { |
| 105 | dev_err(dev, "can't map %pR\n", mem); |
Jassi Brar | 0835480 | 2010-06-25 18:21:19 +0900 | [diff] [blame] | 106 | return -ENOMEM; |
| 107 | } |
| 108 | |
| 109 | /* |
| 110 | * Some platforms might need to prepare for mmio region access, |
| 111 | * which could be done in the following init call. So, the mmio |
| 112 | * region shouldn't be accessed before init (if provided) has |
| 113 | * returned successfully. |
| 114 | */ |
| 115 | if (pdata && pdata->init) { |
| 116 | rc = pdata->init(dev, hpriv->mmio); |
| 117 | if (rc) |
| 118 | return rc; |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | ahci_save_initial_config(dev, hpriv, |
| 122 | pdata ? pdata->force_port_map : 0, |
| 123 | pdata ? pdata->mask_port_map : 0); |
| 124 | |
| 125 | /* prepare host */ |
| 126 | if (hpriv->cap & HOST_CAP_NCQ) |
| 127 | pi.flags |= ATA_FLAG_NCQ; |
| 128 | |
| 129 | if (hpriv->cap & HOST_CAP_PMP) |
| 130 | pi.flags |= ATA_FLAG_PMP; |
| 131 | |
| 132 | ahci_set_em_messages(hpriv, &pi); |
| 133 | |
| 134 | /* CAP.NP sometimes indicate the index of the last enabled |
| 135 | * port, at other times, that of the last possible port, so |
| 136 | * determining the maximum port number requires looking at |
| 137 | * both CAP.NP and port_map. |
| 138 | */ |
| 139 | n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map)); |
| 140 | |
| 141 | host = ata_host_alloc_pinfo(dev, ppi, n_ports); |
| 142 | if (!host) { |
| 143 | rc = -ENOMEM; |
| 144 | goto err0; |
| 145 | } |
| 146 | |
| 147 | host->private_data = hpriv; |
| 148 | |
| 149 | if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss) |
| 150 | host->flags |= ATA_HOST_PARALLEL_SCAN; |
| 151 | else |
| 152 | printk(KERN_INFO "ahci: SSS flag set, parallel bus scan disabled\n"); |
| 153 | |
| 154 | if (pi.flags & ATA_FLAG_EM) |
| 155 | ahci_reset_em(host); |
| 156 | |
| 157 | for (i = 0; i < host->n_ports; i++) { |
| 158 | struct ata_port *ap = host->ports[i]; |
| 159 | |
| 160 | ata_port_desc(ap, "mmio %pR", mem); |
| 161 | ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80); |
| 162 | |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 163 | /* set enclosure management message type */ |
| 164 | if (ap->flags & ATA_FLAG_EM) |
Jeff Garzik | 5578718 | 2010-05-14 17:23:37 -0400 | [diff] [blame] | 165 | ap->em_message_type = hpriv->em_msg_type; |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 166 | |
| 167 | /* disabled/not-implemented port */ |
| 168 | if (!(hpriv->port_map & (1 << i))) |
| 169 | ap->ops = &ata_dummy_port_ops; |
| 170 | } |
| 171 | |
| 172 | rc = ahci_reset_controller(host); |
| 173 | if (rc) |
| 174 | goto err0; |
| 175 | |
| 176 | ahci_init_controller(host); |
| 177 | ahci_print_info(host, "platform"); |
| 178 | |
| 179 | rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED, |
Tejun Heo | fad16e7 | 2010-09-21 09:25:48 +0200 | [diff] [blame] | 180 | &ahci_platform_sht); |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 181 | if (rc) |
| 182 | goto err0; |
| 183 | |
| 184 | return 0; |
| 185 | err0: |
| 186 | if (pdata && pdata->exit) |
| 187 | pdata->exit(dev); |
| 188 | return rc; |
| 189 | } |
| 190 | |
| 191 | static int __devexit ahci_remove(struct platform_device *pdev) |
| 192 | { |
| 193 | struct device *dev = &pdev->dev; |
| 194 | struct ahci_platform_data *pdata = dev->platform_data; |
| 195 | struct ata_host *host = dev_get_drvdata(dev); |
| 196 | |
| 197 | ata_host_detach(host); |
| 198 | |
| 199 | if (pdata && pdata->exit) |
| 200 | pdata->exit(dev); |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
Rob Herring | 02aac31 | 2010-11-03 21:04:59 -0500 | [diff] [blame] | 205 | static const struct of_device_id ahci_of_match[] = { |
| 206 | { .compatible = "calxeda,hb-ahci", }, |
| 207 | {}, |
| 208 | }; |
| 209 | MODULE_DEVICE_TABLE(of, ahci_of_match); |
| 210 | |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 211 | static struct platform_driver ahci_driver = { |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 212 | .remove = __devexit_p(ahci_remove), |
| 213 | .driver = { |
| 214 | .name = "ahci", |
| 215 | .owner = THIS_MODULE, |
Rob Herring | 02aac31 | 2010-11-03 21:04:59 -0500 | [diff] [blame] | 216 | .of_match_table = ahci_of_match, |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 217 | }, |
Richard Zhu | 904c04f | 2011-09-28 15:41:54 +0800 | [diff] [blame] | 218 | .id_table = ahci_devtype, |
Anton Vorontsov | 1c2a49f | 2010-03-04 20:06:06 +0300 | [diff] [blame] | 219 | }; |
| 220 | |
| 221 | static int __init ahci_init(void) |
| 222 | { |
| 223 | return platform_driver_probe(&ahci_driver, ahci_probe); |
| 224 | } |
| 225 | module_init(ahci_init); |
| 226 | |
| 227 | static void __exit ahci_exit(void) |
| 228 | { |
| 229 | platform_driver_unregister(&ahci_driver); |
| 230 | } |
| 231 | module_exit(ahci_exit); |
| 232 | |
| 233 | MODULE_DESCRIPTION("AHCI SATA platform driver"); |
| 234 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); |
| 235 | MODULE_LICENSE("GPL"); |
| 236 | MODULE_ALIAS("platform:ahci"); |