target/linux/ppc40x/patches/101-pata-magicbox-cf-driver.patch

   1 --- a/drivers/ata/Kconfig
   2 +++ b/drivers/ata/Kconfig
   3 @@ -144,6 +144,16 @@ config PDC_ADMA
   4
   5           If unsure, say N.
   6
   7 +config PATA_MAGICBOX_CF
   8 +       tristate "Magicbox/OpenRB Compact Flash support"
   9 +       depends on MAGICBOX || OPENRB
  10 +       help
  11 +         This option enables support for a Compact Flash conected on
  12 +         the ppc405ep expansion bus. This driver had been written for
  13 +         the Magicbox v2 and OpenRB boards.
  14 +
  15 +         If unsure, say N.
  16 +
  17  config PATA_OCTEON_CF
  18         tristate "OCTEON Boot Bus Compact Flash support"
  19         depends on CPU_CAVIUM_OCTEON
  20 --- a/drivers/ata/Makefile
  21 +++ b/drivers/ata/Makefile
  22 @@ -81,6 +81,7 @@ obj-$(CONFIG_PATA_AT91)               += pata_at91.o
  23  obj-$(CONFIG_PATA_CMD640_PCI)  += pata_cmd640.o
  24  obj-$(CONFIG_PATA_ISAPNP)      += pata_isapnp.o
  25  obj-$(CONFIG_PATA_IXP4XX_CF)   += pata_ixp4xx_cf.o
  26 +obj-$(CONFIG_PATA_MAGICBOX_CF) += pata_magicbox_cf.o
  27  obj-$(CONFIG_PATA_MPIIX)       += pata_mpiix.o
  28  obj-$(CONFIG_PATA_NS87410)     += pata_ns87410.o
  29  obj-$(CONFIG_PATA_OPTI)                += pata_opti.o
  30 --- /dev/null
  31 +++ b/drivers/ata/pata_magicbox_cf.c
  32 @@ -0,0 +1,401 @@
  33 +/*
  34 + *  PATA/CompactFlash driver for the MagicBox v2/OpenRB boards.
  35 + *
  36 + *  Copyright (C) 2009,2012 Gabor Juhos <juhosg@openwrt.org>
  37 + *
  38 + *  Based on the IDE driver by Wojtek Kaniewski <wojtekka@toxygen.net>
  39 + *
  40 + *  This program is free software; you can redistribute it and/or modify it
  41 + *  under the terms of the GNU General Public License version 2 as published
  42 + *  by the Free Software Foundation.
  43 + */
  44 +
  45 +#include <linux/kernel.h>
  46 +#include <linux/module.h>
  47 +#include <linux/slab.h>
  48 +#include <linux/types.h>
  49 +#include <linux/ioport.h>
  50 +#include <linux/libata.h>
  51 +#include <linux/irq.h>
  52 +//#include <linux/of.h>
  53 +//#include <linux/of_device.h>
  54 +#include <linux/of_platform.h>
  55 +#include <scsi/scsi_host.h>
  56 +
  57 +#define DRV_DESC       "PATA/CompactFlash driver for Magicbox/OpenRB boards"
  58 +#define DRV_NAME       "pata_magicbox_cf"
  59 +#define DRV_VERSION    "0.1.0"
  60 +
  61 +#define MAGICBOX_CF_REG_CMD            (2 * ATA_REG_CMD)
  62 +#define MAGICBOX_CF_REG_DATA           (2 * ATA_REG_DATA)
  63 +#define MAGICBOX_CF_REG_ERR            (2 * ATA_REG_ERR)
  64 +#define MAGICBOX_CF_REG_FEATURE        (2 * ATA_REG_FEATURE)
  65 +#define MAGICBOX_CF_REG_NSECT          (2 * ATA_REG_NSECT)
  66 +#define MAGICBOX_CF_REG_LBAL           (2 * ATA_REG_LBAL)
  67 +#define MAGICBOX_CF_REG_LBAM           (2 * ATA_REG_LBAM)
  68 +#define MAGICBOX_CF_REG_LBAH           (2 * ATA_REG_LBAH)
  69 +#define MAGICBOX_CF_REG_DEVICE         (2 * ATA_REG_DEVICE)
  70 +#define MAGICBOX_CF_REG_STATUS         (2 * ATA_REG_STATUS)
  71 +#define MAGICBOX_CF_REG_ALTSTATUS      (2 * 6)
  72 +#define MAGICBOX_CF_REG_CTL            (2 * 6)
  73 +
  74 +#define MAGICBOX_CF_MAXPORTS   1
  75 +
  76 +struct magicbox_cf_info {
  77 +       void __iomem    *base;
  78 +       void __iomem    *ctrl;
  79 +};
  80 +
  81 +static inline u8 magicbox_cf_inb(void __iomem *port)
  82 +{
  83 +       return (u8) (readw(port) >> 8) & 0xff;
  84 +}
  85 +
  86 +static inline void magicbox_cf_outb(void __iomem *port, u8 value)
  87 +{
  88 +       writew(value << 8, port);
  89 +}
  90 +
  91 +static int magicbox_cf_set_mode(struct ata_link *link,
  92 +                               struct ata_device **error)
  93 +{
  94 +       struct ata_device *dev;
  95 +
  96 +       ata_for_each_dev(dev, link, ENABLED) {
  97 +               ata_dev_printk(dev, KERN_INFO, "configured for PIO0\n");
  98 +               dev->pio_mode = XFER_PIO_0;
  99 +               dev->xfer_mode = XFER_PIO_0;
 100 +               dev->xfer_shift = ATA_SHIFT_PIO;
 101 +               dev->flags |= ATA_DFLAG_PIO;
 102 +       }
 103 +
 104 +       return 0;
 105 +}
 106 +
 107 +static void magicbox_cf_exec_command(struct ata_port *ap,
 108 +                                    const struct ata_taskfile *tf)
 109 +{
 110 +       DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
 111 +
 112 +       magicbox_cf_outb(ap->ioaddr.command_addr, tf->command);
 113 +       ata_sff_pause(ap);
 114 +}
 115 +
 116 +static u8 magicbox_cf_check_status(struct ata_port *ap)
 117 +{
 118 +       u8 status;
 119 +
 120 +       status = magicbox_cf_inb(ap->ioaddr.status_addr);
 121 +
 122 +       DPRINTK("ata%u: status 0x%X, from %p\n", ap->print_id, status,
 123 +               ap->ioaddr.status_addr);
 124 +
 125 +       return status;
 126 +}
 127 +
 128 +static u8 magicbox_cf_check_altstatus(struct ata_port *ap)
 129 +{
 130 +       u8 altstatus;
 131 +
 132 +       altstatus = magicbox_cf_inb(ap->ioaddr.altstatus_addr);
 133 +
 134 +       DPRINTK("ata%u: altstatus 0x%X, from %p\n", ap->print_id,
 135 +               altstatus, ap->ioaddr.altstatus_addr);
 136 +
 137 +       return altstatus;
 138 +}
 139 +
 140 +static void magicbox_cf_dev_select(struct ata_port *ap, unsigned int device)
 141 +{
 142 +       /* Nothing to do. We are supporting one device only. */
 143 +}
 144 +
 145 +static void magicbox_cf_tf_load(struct ata_port *ap,
 146 +                               const struct ata_taskfile *tf)
 147 +{
 148 +       struct ata_ioports *ioaddr = &ap->ioaddr;
 149 +       unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
 150 +
 151 +       if (tf->ctl != ap->last_ctl) {
 152 +               magicbox_cf_outb(ioaddr->ctl_addr, tf->ctl);
 153 +               ap->last_ctl = tf->ctl;
 154 +               ata_wait_idle(ap);
 155 +       }
 156 +
 157 +       if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
 158 +               magicbox_cf_outb(ioaddr->feature_addr, tf->hob_feature);
 159 +               magicbox_cf_outb(ioaddr->nsect_addr, tf->hob_nsect);
 160 +               magicbox_cf_outb(ioaddr->lbal_addr, tf->hob_lbal);
 161 +               magicbox_cf_outb(ioaddr->lbam_addr, tf->hob_lbam);
 162 +               magicbox_cf_outb(ioaddr->lbah_addr, tf->hob_lbah);
 163 +               VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
 164 +                       tf->hob_feature,
 165 +                       tf->hob_nsect,
 166 +                       tf->hob_lbal,
 167 +                       tf->hob_lbam,
 168 +                       tf->hob_lbah);
 169 +       }
 170 +
 171 +       if (is_addr) {
 172 +               magicbox_cf_outb(ioaddr->feature_addr, tf->feature);
 173 +               magicbox_cf_outb(ioaddr->nsect_addr, tf->nsect);
 174 +               magicbox_cf_outb(ioaddr->lbal_addr, tf->lbal);
 175 +               magicbox_cf_outb(ioaddr->lbam_addr, tf->lbam);
 176 +               magicbox_cf_outb(ioaddr->lbah_addr, tf->lbah);
 177 +               VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
 178 +                       tf->feature,
 179 +                       tf->nsect,
 180 +                       tf->lbal,
 181 +                       tf->lbam,
 182 +                       tf->lbah);
 183 +       }
 184 +
 185 +       if (tf->flags & ATA_TFLAG_DEVICE) {
 186 +               magicbox_cf_outb(ioaddr->device_addr, tf->device);
 187 +               VPRINTK("device 0x%X\n", tf->device);
 188 +       }
 189 +
 190 +       ata_wait_idle(ap);
 191 +}
 192 +
 193 +static void magicbox_cf_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
 194 +{
 195 +       struct ata_ioports *ioaddr = &ap->ioaddr;
 196 +
 197 +       tf->command = magicbox_cf_inb(ap->ioaddr.status_addr);
 198 +       tf->feature = magicbox_cf_inb(ioaddr->error_addr);
 199 +       tf->nsect = magicbox_cf_inb(ioaddr->nsect_addr);
 200 +       tf->lbal = magicbox_cf_inb(ioaddr->lbal_addr);
 201 +       tf->lbam = magicbox_cf_inb(ioaddr->lbam_addr);
 202 +       tf->lbah = magicbox_cf_inb(ioaddr->lbah_addr);
 203 +       tf->device = magicbox_cf_inb(ioaddr->device_addr);
 204 +       VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
 205 +               tf->feature,
 206 +               tf->nsect,
 207 +               tf->lbal,
 208 +               tf->lbam,
 209 +               tf->lbah);
 210 +
 211 +       if (tf->flags & ATA_TFLAG_LBA48) {
 212 +               magicbox_cf_outb(ioaddr->ctl_addr, tf->ctl | ATA_HOB);
 213 +               tf->hob_feature = magicbox_cf_inb(ioaddr->error_addr);
 214 +               tf->hob_nsect = magicbox_cf_inb(ioaddr->nsect_addr);
 215 +               tf->hob_lbal = magicbox_cf_inb(ioaddr->lbal_addr);
 216 +               tf->hob_lbam = magicbox_cf_inb(ioaddr->lbam_addr);
 217 +               tf->hob_lbah = magicbox_cf_inb(ioaddr->lbah_addr);
 218 +               magicbox_cf_outb(ioaddr->ctl_addr, tf->ctl);
 219 +               ap->last_ctl = tf->ctl;
 220 +               VPRINTK("hob: feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
 221 +                       tf->feature,
 222 +                       tf->nsect,
 223 +                       tf->lbal,
 224 +                       tf->lbam,
 225 +                       tf->lbah);
 226 +       }
 227 +}
 228 +
 229 +static unsigned int magicbox_cf_data_xfer(struct ata_device *dev,
 230 +                                         unsigned char *buf,
 231 +                                         unsigned int buflen, int rw)
 232 +{
 233 +       struct ata_port *ap = dev->link->ap;
 234 +       unsigned int words = buflen >> 1;
 235 +       unsigned int i;
 236 +       u16 *buf16 = (u16 *) buf;
 237 +       void __iomem *mmio = ap->ioaddr.data_addr;
 238 +
 239 +       /* Transfer multiple of 2 bytes */
 240 +       if (rw == READ)
 241 +               for (i = 0; i < words; i++)
 242 +                       buf16[i] = readw(mmio);
 243 +       else
 244 +               for (i = 0; i < words; i++)
 245 +                       writew(buf16[i], mmio);
 246 +
 247 +       /* Transfer trailing 1 byte, if any. */
 248 +       if (unlikely(buflen & 0x01)) {
 249 +               u16 align_buf[1] = { 0 };
 250 +               unsigned char *trailing_buf = buf + buflen - 1;
 251 +
 252 +               if (rw == READ) {
 253 +                       align_buf[0] = readw(mmio);
 254 +                       memcpy(trailing_buf, align_buf, 1);
 255 +               } else {
 256 +                       memcpy(align_buf, trailing_buf, 1);
 257 +                       writew(align_buf[0], mmio);
 258 +               }
 259 +               words++;
 260 +       }
 261 +
 262 +       return words << 1;
 263 +}
 264 +
 265 +static void magicbox_cf_irq_on(struct ata_port *ap)
 266 +{
 267 +       /* Nothing to do. */
 268 +}
 269 +
 270 +static void magicbox_cf_irq_clear(struct ata_port *ap)
 271 +{
 272 +       /* Nothing to do. */
 273 +}
 274 +
 275 +static struct ata_port_operations magicbox_cf_port_ops = {
 276 +       .inherits               = &ata_sff_port_ops,
 277 +
 278 +       .cable_detect           = ata_cable_40wire,
 279 +       .set_mode               = magicbox_cf_set_mode,
 280 +
 281 +       .sff_exec_command       = magicbox_cf_exec_command,
 282 +       .sff_check_status       = magicbox_cf_check_status,
 283 +       .sff_check_altstatus    = magicbox_cf_check_altstatus,
 284 +       .sff_dev_select         = magicbox_cf_dev_select,
 285 +       .sff_tf_load            = magicbox_cf_tf_load,
 286 +       .sff_tf_read            = magicbox_cf_tf_read,
 287 +       .sff_data_xfer          = magicbox_cf_data_xfer,
 288 +
 289 +       .sff_irq_on             = magicbox_cf_irq_on,
 290 +       .sff_irq_clear          = magicbox_cf_irq_clear,
 291 +
 292 +       .port_start             = ATA_OP_NULL,
 293 +};
 294 +
 295 +static struct scsi_host_template magicbox_cf_sht = {
 296 +       ATA_PIO_SHT(DRV_NAME),
 297 +};
 298 +
 299 +static inline void magicbox_cf_setup_port(struct ata_host *host)
 300 +{
 301 +       struct magicbox_cf_info *info = host->private_data;
 302 +       struct ata_port *ap;
 303 +
 304 +       ap = host->ports[0];
 305 +
 306 +       ap->ops = &magicbox_cf_port_ops;
 307 +       ap->pio_mask = ATA_PIO4;
 308 +       ap->flags |= ATA_FLAG_NO_ATAPI;
 309 +
 310 +       ap->ioaddr.cmd_addr = info->base + MAGICBOX_CF_REG_CMD;
 311 +       ap->ioaddr.data_addr = info->base + MAGICBOX_CF_REG_DATA;
 312 +       ap->ioaddr.error_addr = info->base + MAGICBOX_CF_REG_ERR;
 313 +       ap->ioaddr.feature_addr = info->base + MAGICBOX_CF_REG_FEATURE;
 314 +       ap->ioaddr.nsect_addr = info->base + MAGICBOX_CF_REG_NSECT;
 315 +       ap->ioaddr.lbal_addr = info->base + MAGICBOX_CF_REG_LBAL;
 316 +       ap->ioaddr.lbam_addr = info->base + MAGICBOX_CF_REG_LBAM;
 317 +       ap->ioaddr.lbah_addr = info->base + MAGICBOX_CF_REG_LBAH;
 318 +       ap->ioaddr.device_addr = info->base + MAGICBOX_CF_REG_DEVICE;
 319 +       ap->ioaddr.status_addr = info->base + MAGICBOX_CF_REG_STATUS;
 320 +       ap->ioaddr.command_addr = info->base + MAGICBOX_CF_REG_CMD;
 321 +
 322 +       ap->ioaddr.altstatus_addr = info->ctrl + MAGICBOX_CF_REG_ALTSTATUS;
 323 +       ap->ioaddr.ctl_addr = info->ctrl + MAGICBOX_CF_REG_CTL;
 324 +
 325 +       ata_port_desc(ap, "cmd 0x%p ctl 0x%p", ap->ioaddr.cmd_addr,
 326 +                     ap->ioaddr.ctl_addr);
 327 +}
 328 +
 329 +static int __devinit magicbox_cf_of_probe(struct platform_device *op)
 330 +{
 331 +       struct magicbox_cf_info *info;
 332 +       struct ata_host *host;
 333 +       int irq;
 334 +       int ret = 0;
 335 +
 336 +       info = kzalloc(sizeof(struct magicbox_cf_info), GFP_KERNEL);
 337 +       if (info == NULL) {
 338 +               ret = -ENOMEM;
 339 +               goto err_exit;
 340 +       }
 341 +
 342 +       irq = irq_of_parse_and_map(op->dev.of_node, 0);
 343 +       if (irq < 0) {
 344 +               dev_err(&op->dev, "invalid irq\n");
 345 +               ret = -EINVAL;
 346 +               goto err_free_info;
 347 +       }
 348 +
 349 +       info->base = of_iomap(op->dev.of_node, 0);
 350 +       if (info->base == NULL) {
 351 +               ret = -ENOMEM;
 352 +               goto err_free_info;
 353 +       }
 354 +
 355 +       info->ctrl = of_iomap(op->dev.of_node, 1);
 356 +       if (info->ctrl == NULL) {
 357 +               ret = -ENOMEM;
 358 +               goto err_unmap_base;
 359 +       }
 360 +
 361 +       host = ata_host_alloc(&op->dev, MAGICBOX_CF_MAXPORTS);
 362 +       if (host == NULL) {
 363 +               ret = -ENOMEM;
 364 +               goto err_unmap_ctrl;
 365 +       }
 366 +
 367 +       host->private_data = info;
 368 +       magicbox_cf_setup_port(host);
 369 +
 370 +       ret = ata_host_activate(host, irq, ata_sff_interrupt,
 371 +                               IRQF_TRIGGER_RISING, &magicbox_cf_sht);
 372 +       if (ret)
 373 +               goto err_unmap_ctrl;
 374 +
 375 +       dev_set_drvdata(&op->dev, host);
 376 +       return 0;
 377 +
 378 + err_unmap_ctrl:
 379 +       iounmap(info->ctrl);
 380 + err_unmap_base:
 381 +       iounmap(info->base);
 382 + err_free_info:
 383 +       kfree(info);
 384 + err_exit:
 385 +       return ret;
 386 +}
 387 +
 388 +static __devexit int magicbox_cf_of_remove(struct platform_device *op)
 389 +{
 390 +       struct ata_host *host = dev_get_drvdata(&op->dev);
 391 +       struct magicbox_cf_info *info = host->private_data;
 392 +
 393 +       ata_host_detach(host);
 394 +       iounmap(info->ctrl);
 395 +       iounmap(info->base);
 396 +       kfree(info);
 397 +
 398 +       return 0;
 399 +}
 400 +
 401 +static struct of_device_id magicbox_cf_of_match[] = {
 402 +       { .compatible = "pata-magicbox-cf", },
 403 +       {},
 404 +};
 405 +
 406 +static struct platform_driver magicbox_cf_of_platform_driver = {
 407 +       .probe          = magicbox_cf_of_probe,
 408 +       .remove         = __devexit_p(magicbox_cf_of_remove),
 409 +       .driver         = {
 410 +               .name = DRV_NAME,
 411 +               .owner = THIS_MODULE,
 412 +               .of_match_table = magicbox_cf_of_match,
 413 +       },
 414 +};
 415 +
 416 +static int __init magicbox_cf_init(void)
 417 +{
 418 +       return platform_driver_register(&magicbox_cf_of_platform_driver);
 419 +}
 420 +
 421 +static void __exit magicbox_cf_exit(void)
 422 +{
 423 +       platform_driver_unregister(&magicbox_cf_of_platform_driver);
 424 +}
 425 +
 426 +module_init(magicbox_cf_init);
 427 +module_exit(magicbox_cf_exit);
 428 +
 429 +MODULE_DESCRIPTION(DRV_DESC);
 430 +MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
 431 +MODULE_LICENSE("GPL v2");
 432 +MODULE_VERSION(DRV_VERSION);
 433 +MODULE_DEVICE_TABLE(of, magicbox_cf_of_match);