target/linux/brcm63xx/patches-3.3/240-spi.patch

   1 --- /dev/null
   2 +++ b/arch/mips/bcm63xx/dev-spi.c
   3 @@ -0,0 +1,99 @@
   4 +/*
   5 + * This file is subject to the terms and conditions of the GNU General Public
   6 + * License.  See the file "COPYING" in the main directory of this archive
   7 + * for more details.
   8 + *
   9 + * Copyright (C) 2009-2011 Florian Fainelli <florian@openwrt.org>
  10 + * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
  11 + */
  12 +
  13 +#include <linux/init.h>
  14 +#include <linux/kernel.h>
  15 +#include <linux/platform_device.h>
  16 +#include <linux/export.h>
  17 +
  18 +#include <bcm63xx_cpu.h>
  19 +#include <bcm63xx_dev_spi.h>
  20 +#include <bcm63xx_regs.h>
  21 +
  22 +#ifdef BCMCPU_RUNTIME_DETECT
  23 +/*
  24 + * register offsets
  25 + */
  26 +static const unsigned long bcm96338_regs_spi[] = {
  27 +       __GEN_SPI_REGS_TABLE(6338)
  28 +};
  29 +
  30 +static const unsigned long bcm96348_regs_spi[] = {
  31 +       __GEN_SPI_REGS_TABLE(6348)
  32 +};
  33 +
  34 +static const unsigned long bcm96358_regs_spi[] = {
  35 +       __GEN_SPI_REGS_TABLE(6358)
  36 +};
  37 +
  38 +const unsigned long *bcm63xx_regs_spi;
  39 +EXPORT_SYMBOL(bcm63xx_regs_spi);
  40 +
  41 +static __init void bcm63xx_spi_regs_init(void)
  42 +{
  43 +       if (BCMCPU_IS_6338())
  44 +               bcm63xx_regs_spi = bcm96338_regs_spi;
  45 +       if (BCMCPU_IS_6348())
  46 +               bcm63xx_regs_spi = bcm96348_regs_spi;
  47 +       if (BCMCPU_IS_6358())
  48 +               bcm63xx_regs_spi = bcm96358_regs_spi;
  49 +}
  50 +#else
  51 +static __init void bcm63xx_spi_regs_init(void) { }
  52 +#endif
  53 +
  54 +static struct resource spi_resources[] = {
  55 +       {
  56 +               .start          = -1, /* filled at runtime */
  57 +               .end            = -1, /* filled at runtime */
  58 +               .flags          = IORESOURCE_MEM,
  59 +       },
  60 +       {
  61 +               .start          = -1, /* filled at runtime */
  62 +               .flags          = IORESOURCE_IRQ,
  63 +       },
  64 +};
  65 +
  66 +static struct bcm63xx_spi_pdata spi_pdata = {
  67 +       .bus_num                = 0,
  68 +       .num_chipselect         = 8,
  69 +       .speed_hz               = 50000000,     /* Fclk */
  70 +};
  71 +
  72 +static struct platform_device bcm63xx_spi_device = {
  73 +       .name           = "bcm63xx-spi",
  74 +       .id             = 0,
  75 +       .num_resources  = ARRAY_SIZE(spi_resources),
  76 +       .resource       = spi_resources,
  77 +       .dev            = {
  78 +               .platform_data = &spi_pdata,
  79 +       },
  80 +};
  81 +
  82 +int __init bcm63xx_spi_register(void)
  83 +{
  84 +       spi_resources[0].start = bcm63xx_regset_address(RSET_SPI);
  85 +       spi_resources[0].end = spi_resources[0].start;
  86 +       spi_resources[0].end += RSET_SPI_SIZE - 1;
  87 +       spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
  88 +
  89 +       if (BCMCPU_IS_6345())
  90 +               return -ENODEV;
  91 +
  92 +       /* Fill in platform data */
  93 +       if (BCMCPU_IS_6338() || BCMCPU_IS_6348())
  94 +               spi_pdata.fifo_size = SPI_BCM_6338_SPI_MSG_DATA_SIZE;
  95 +
  96 +       if (BCMCPU_IS_6358())
  97 +               spi_pdata.fifo_size = SPI_BCM_6358_SPI_MSG_DATA_SIZE;
  98 +
  99 +       bcm63xx_spi_regs_init();
 100 +
 101 +       return platform_device_register(&bcm63xx_spi_device);
 102 +}
 103 --- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
 104 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
 105 @@ -138,6 +138,7 @@ enum bcm63xx_regs_set {
 106  #define RSET_ENET_SIZE                 2048
 107  #define RSET_ENETDMA_SIZE              2048
 108  #define RSET_ENETSW_SIZE               65536
 109 +#define RSET_SPI_SIZE                  256
 110  #define RSET_UART_SIZE                 24
 111  #define RSET_UDC_SIZE                  256
 112  #define RSET_OHCI_SIZE                 256
 113 @@ -289,7 +290,7 @@ enum bcm63xx_regs_set {
 114  #define BCM_6358_UART0_BASE            (0xfffe0100)
 115  #define BCM_6358_UART1_BASE            (0xfffe0120)
 116  #define BCM_6358_GPIO_BASE             (0xfffe0080)
 117 -#define BCM_6358_SPI_BASE              (0xdeadbeef)
 118 +#define BCM_6358_SPI_BASE              (0xfffe0800)
 119  #define BCM_6358_SPI2_BASE             (0xfffe0800)
 120  #define BCM_6358_UDC0_BASE             (0xfffe0400)
 121  #define BCM_6358_OHCI0_BASE            (0xfffe1400)
 122 @@ -478,6 +479,7 @@ static inline unsigned long bcm63xx_regs
 123   */
 124  enum bcm63xx_irq {
 125         IRQ_TIMER = 0,
 126 +       IRQ_SPI,
 127         IRQ_UART0,
 128         IRQ_UART1,
 129         IRQ_DSL,
 130 @@ -571,6 +573,7 @@ enum bcm63xx_irq {
 131   * 6348 irqs
 132   */
 133  #define BCM_6348_TIMER_IRQ             (IRQ_INTERNAL_BASE + 0)
 134 +#define BCM_6348_SPI_IRQ               (IRQ_INTERNAL_BASE + 1)
 135  #define BCM_6348_UART0_IRQ             (IRQ_INTERNAL_BASE + 2)
 136  #define BCM_6348_UART1_IRQ             0
 137  #define BCM_6348_DSL_IRQ               (IRQ_INTERNAL_BASE + 4)
 138 @@ -608,6 +611,7 @@ enum bcm63xx_irq {
 139   * 6358 irqs
 140   */
 141  #define BCM_6358_TIMER_IRQ             (IRQ_INTERNAL_BASE + 0)
 142 +#define BCM_6358_SPI_IRQ               (IRQ_INTERNAL_BASE + 1)
 143  #define BCM_6358_UART0_IRQ             (IRQ_INTERNAL_BASE + 2)
 144  #define BCM_6358_UART1_IRQ             (IRQ_INTERNAL_BASE + 3)
 145  #define BCM_6358_DSL_IRQ               (IRQ_INTERNAL_BASE + 29)
 146 --- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
 147 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
 148 @@ -1007,4 +1007,116 @@
 149  #define M2M_SRCID_REG(x)               ((x) * 0x40 + 0x14)
 150  #define M2M_DSTID_REG(x)               ((x) * 0x40 + 0x18)
 151
 152 +/*************************************************************************
 153 + * _REG relative to RSET_SPI
 154 + *************************************************************************/
 155 +
 156 +/* BCM 6338 SPI core */
 157 +#define SPI_BCM_6338_SPI_CMD           0x00    /* 16-bits register */
 158 +#define SPI_BCM_6338_SPI_INT_STATUS    0x02
 159 +#define SPI_BCM_6338_SPI_INT_MASK_ST   0x03
 160 +#define SPI_BCM_6338_SPI_INT_MASK      0x04
 161 +#define SPI_BCM_6338_SPI_ST            0x05
 162 +#define SPI_BCM_6338_SPI_CLK_CFG       0x06
 163 +#define SPI_BCM_6338_SPI_FILL_BYTE     0x07
 164 +#define SPI_BCM_6338_SPI_MSG_TAIL      0x09
 165 +#define SPI_BCM_6338_SPI_RX_TAIL       0x0b
 166 +#define SPI_BCM_6338_SPI_MSG_CTL       0x40
 167 +#define SPI_BCM_6338_SPI_MSG_DATA      0x41
 168 +#define SPI_BCM_6338_SPI_MSG_DATA_SIZE 0x3f
 169 +#define SPI_BCM_6338_SPI_RX_DATA       0x80
 170 +#define SPI_BCM_6338_SPI_RX_DATA_SIZE  0x3f
 171 +
 172 +/* BCM 6348 SPI core */
 173 +#define SPI_BCM_6348_SPI_CMD           0x00    /* 16-bits register */
 174 +#define SPI_BCM_6348_SPI_INT_STATUS    0x02
 175 +#define SPI_BCM_6348_SPI_INT_MASK_ST   0x03
 176 +#define SPI_BCM_6348_SPI_INT_MASK      0x04
 177 +#define SPI_BCM_6348_SPI_ST            0x05
 178 +#define SPI_BCM_6348_SPI_CLK_CFG       0x06
 179 +#define SPI_BCM_6348_SPI_FILL_BYTE     0x07
 180 +#define SPI_BCM_6348_SPI_MSG_TAIL      0x09
 181 +#define SPI_BCM_6348_SPI_RX_TAIL       0x0b
 182 +#define SPI_BCM_6348_SPI_MSG_CTL       0x40
 183 +#define SPI_BCM_6348_SPI_MSG_DATA      0x41
 184 +#define SPI_BCM_6348_SPI_MSG_DATA_SIZE 0x3f
 185 +#define SPI_BCM_6348_SPI_RX_DATA       0x80
 186 +#define SPI_BCM_6348_SPI_RX_DATA_SIZE  0x3f
 187 +
 188 +/* BCM 6358 SPI core */
 189 +#define SPI_BCM_6358_SPI_MSG_CTL       0x00    /* 16-bits register */
 190 +
 191 +#define SPI_BCM_6358_SPI_MSG_DATA      0x02
 192 +#define SPI_BCM_6358_SPI_MSG_DATA_SIZE 0x21e
 193 +
 194 +#define SPI_BCM_6358_SPI_RX_DATA       0x400
 195 +#define SPI_BCM_6358_SPI_RX_DATA_SIZE  0x220
 196 +
 197 +#define SPI_BCM_6358_SPI_CMD           0x700   /* 16-bits register */
 198 +
 199 +#define SPI_BCM_6358_SPI_INT_STATUS    0x702
 200 +#define SPI_BCM_6358_SPI_INT_MASK_ST   0x703
 201 +
 202 +#define SPI_BCM_6358_SPI_INT_MASK      0x704
 203 +
 204 +#define SPI_BCM_6358_SPI_ST            0x705
 205 +
 206 +#define SPI_BCM_6358_SPI_CLK_CFG       0x706
 207 +
 208 +#define SPI_BCM_6358_SPI_FILL_BYTE     0x707
 209 +#define SPI_BCM_6358_SPI_MSG_TAIL      0x709
 210 +#define SPI_BCM_6358_SPI_RX_TAIL       0x70B
 211 +
 212 +/* Shared SPI definitions */
 213 +
 214 +/* Message configuration */
 215 +#define SPI_FD_RW                      0x00
 216 +#define SPI_HD_W                       0x01
 217 +#define SPI_HD_R                       0x02
 218 +#define SPI_BYTE_CNT_SHIFT             0
 219 +#define SPI_MSG_TYPE_SHIFT             14
 220 +
 221 +/* Command */
 222 +#define SPI_CMD_NOOP                   0x00
 223 +#define SPI_CMD_SOFT_RESET             0x01
 224 +#define SPI_CMD_HARD_RESET             0x02
 225 +#define SPI_CMD_START_IMMEDIATE                0x03
 226 +#define SPI_CMD_COMMAND_SHIFT          0
 227 +#define SPI_CMD_COMMAND_MASK           0x000f
 228 +#define SPI_CMD_DEVICE_ID_SHIFT                4
 229 +#define SPI_CMD_PREPEND_BYTE_CNT_SHIFT 8
 230 +#define SPI_CMD_ONE_BYTE_SHIFT         11
 231 +#define SPI_CMD_ONE_WIRE_SHIFT         12
 232 +#define SPI_DEV_ID_0                   0
 233 +#define SPI_DEV_ID_1                   1
 234 +#define SPI_DEV_ID_2                   2
 235 +#define SPI_DEV_ID_3                   3
 236 +
 237 +/* Interrupt mask */
 238 +#define SPI_INTR_CMD_DONE              0x01
 239 +#define SPI_INTR_RX_OVERFLOW           0x02
 240 +#define SPI_INTR_TX_UNDERFLOW          0x04
 241 +#define SPI_INTR_TX_OVERFLOW           0x08
 242 +#define SPI_INTR_RX_UNDERFLOW          0x10
 243 +#define SPI_INTR_CLEAR_ALL             0x1f
 244 +
 245 +/* Status */
 246 +#define SPI_RX_EMPTY                   0x02
 247 +#define SPI_CMD_BUSY                   0x04
 248 +#define SPI_SERIAL_BUSY                        0x08
 249 +
 250 +/* Clock configuration */
 251 +#define SPI_CLK_20MHZ                  0x00
 252 +#define SPI_CLK_0_391MHZ               0x01
 253 +#define SPI_CLK_0_781MHZ               0x02 /* default */
 254 +#define SPI_CLK_1_563MHZ               0x03
 255 +#define SPI_CLK_3_125MHZ               0x04
 256 +#define SPI_CLK_6_250MHZ               0x05
 257 +#define SPI_CLK_12_50MHZ               0x06
 258 +#define SPI_CLK_25MHZ                  0x07
 259 +#define SPI_CLK_MASK                   0x07
 260 +#define SPI_SSOFFTIME_MASK             0x38
 261 +#define SPI_SSOFFTIME_SHIFT            3
 262 +#define SPI_BYTE_SWAP                  0x80
 263 +
 264  #endif /* BCM63XX_REGS_H_ */
 265 --- /dev/null
 266 +++ b/drivers/spi/bcm63xx_spi.c
 267 @@ -0,0 +1,496 @@
 268 +/*
 269 + * Broadcom BCM63xx SPI controller support
 270 + *
 271 + * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
 272 + * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
 273 + *
 274 + * This program is free software; you can redistribute it and/or
 275 + * modify it under the terms of the GNU General Public License
 276 + * as published by the Free Software Foundation; either version 2
 277 + * of the License, or (at your option) any later version.
 278 + *
 279 + * This program is distributed in the hope that it will be useful,
 280 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
 281 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 282 + * GNU General Public License for more details.
 283 + *
 284 + * You should have received a copy of the GNU General Public License
 285 + * along with this program; if not, write to the
 286 + * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 287 + */
 288 +
 289 +#include <linux/kernel.h>
 290 +#include <linux/init.h>
 291 +#include <linux/clk.h>
 292 +#include <linux/module.h>
 293 +#include <linux/platform_device.h>
 294 +#include <linux/delay.h>
 295 +#include <linux/interrupt.h>
 296 +#include <linux/spi/spi.h>
 297 +#include <linux/completion.h>
 298 +#include <linux/err.h>
 299 +
 300 +#include <bcm63xx_dev_spi.h>
 301 +
 302 +#define PFX            KBUILD_MODNAME
 303 +#define DRV_VER                "0.1.2"
 304 +
 305 +struct bcm63xx_spi {
 306 +       spinlock_t              lock;
 307 +       int                     stopping;
 308 +        struct completion      done;
 309 +
 310 +       void __iomem            *regs;
 311 +       int                     irq;
 312 +
 313 +       /* Platform data */
 314 +        u32                    speed_hz;
 315 +       unsigned                fifo_size;
 316 +
 317 +       /* Data buffers */
 318 +       const unsigned char     *tx_ptr;
 319 +       unsigned char           *rx_ptr;
 320 +
 321 +       /* data iomem */
 322 +       u8 __iomem              *tx_io;
 323 +       const u8 __iomem        *rx_io;
 324 +
 325 +       int                     remaining_bytes;
 326 +
 327 +       struct clk              *clk;
 328 +       struct platform_device  *pdev;
 329 +};
 330 +
 331 +static inline u8 bcm_spi_readb(struct bcm63xx_spi *bs,
 332 +                               unsigned int offset)
 333 +{
 334 +       return bcm_readw(bs->regs + bcm63xx_spireg(offset));
 335 +}
 336 +
 337 +static inline u16 bcm_spi_readw(struct bcm63xx_spi *bs,
 338 +                               unsigned int offset)
 339 +{
 340 +       return bcm_readw(bs->regs + bcm63xx_spireg(offset));
 341 +}
 342 +
 343 +static inline void bcm_spi_writeb(struct bcm63xx_spi *bs,
 344 +                                 u8 value, unsigned int offset)
 345 +{
 346 +       bcm_writeb(value, bs->regs + bcm63xx_spireg(offset));
 347 +}
 348 +
 349 +static inline void bcm_spi_writew(struct bcm63xx_spi *bs,
 350 +                                 u16 value, unsigned int offset)
 351 +{
 352 +       bcm_writew(value, bs->regs + bcm63xx_spireg(offset));
 353 +}
 354 +
 355 +static int bcm63xx_spi_setup_transfer(struct spi_device *spi,
 356 +                                     struct spi_transfer *t)
 357 +{
 358 +       u8 bits_per_word;
 359 +       u8 clk_cfg;
 360 +       u32 hz;
 361 +       unsigned int div;
 362 +
 363 +       struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
 364 +
 365 +       bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word;
 366 +       hz = (t) ? t->speed_hz : spi->max_speed_hz;
 367 +       if (bits_per_word != 8) {
 368 +               dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
 369 +                       __func__, bits_per_word);
 370 +               return -EINVAL;
 371 +        }
 372 +
 373 +       if (spi->chip_select > spi->master->num_chipselect) {
 374 +               dev_err(&spi->dev, "%s, unsupported slave %d\n",
 375 +                       __func__, spi->chip_select);
 376 +               return -EINVAL;
 377 +       }
 378 +
 379 +       /* Check clock setting */
 380 +       div = (bs->speed_hz / hz);
 381 +       switch (div) {
 382 +       case 2:
 383 +               clk_cfg = SPI_CLK_25MHZ;
 384 +               break;
 385 +       case 4:
 386 +               clk_cfg = SPI_CLK_12_50MHZ;
 387 +               break;
 388 +       case 8:
 389 +               clk_cfg = SPI_CLK_6_250MHZ;
 390 +               break;
 391 +       case 16:
 392 +               clk_cfg = SPI_CLK_3_125MHZ;
 393 +               break;
 394 +       case 32:
 395 +               clk_cfg = SPI_CLK_1_563MHZ;
 396 +               break;
 397 +       case 64:
 398 +               clk_cfg = SPI_CLK_0_781MHZ;
 399 +               break;
 400 +       case 128:
 401 +       default:
 402 +               /* Set to slowest mode for compatibility */
 403 +               clk_cfg = SPI_CLK_0_391MHZ;
 404 +               break;
 405 +       }
 406 +
 407 +       bcm_spi_writeb(bs, clk_cfg, SPI_CLK_CFG);
 408 +       dev_dbg(&spi->dev, "Setting clock register to %d (hz %d, cmd %02x)\n",
 409 +               div, hz, clk_cfg);
 410 +
 411 +       return 0;
 412 +}
 413 +
 414 +/* the spi->mode bits understood by this driver: */
 415 +#define MODEBITS (SPI_CPOL | SPI_CPHA)
 416 +
 417 +static int bcm63xx_spi_setup(struct spi_device *spi)
 418 +{
 419 +       struct bcm63xx_spi *bs;
 420 +       int ret;
 421 +
 422 +       bs = spi_master_get_devdata(spi->master);
 423 +
 424 +       if (bs->stopping)
 425 +               return -ESHUTDOWN;
 426 +
 427 +       if (!spi->bits_per_word)
 428 +               spi->bits_per_word = 8;
 429 +
 430 +       if (spi->mode & ~MODEBITS) {
 431 +               dev_err(&spi->dev, "%s, unsupported mode bits %x\n",
 432 +                       __func__, spi->mode & ~MODEBITS);
 433 +               return -EINVAL;
 434 +       }
 435 +
 436 +       ret = bcm63xx_spi_setup_transfer(spi, NULL);
 437 +       if (ret < 0) {
 438 +               dev_err(&spi->dev, "setup: unsupported mode bits %x\n",
 439 +                       spi->mode & ~MODEBITS);
 440 +               return ret;
 441 +       }
 442 +
 443 +       dev_dbg(&spi->dev, "%s, mode %d, %u bits/w, %u nsec/bit\n",
 444 +               __func__, spi->mode & MODEBITS, spi->bits_per_word, 0);
 445 +
 446 +       return 0;
 447 +}
 448 +
 449 +/* Fill the TX FIFO with as many bytes as possible */
 450 +static void bcm63xx_spi_fill_tx_fifo(struct bcm63xx_spi *bs)
 451 +{
 452 +       u8 size;
 453 +
 454 +        /* Fill the Tx FIFO with as many bytes as possible */
 455 +       size = bs->remaining_bytes < bs->fifo_size ? bs->remaining_bytes :
 456 +               bs->fifo_size;
 457 +       memcpy_toio(bs->tx_io, bs->tx_ptr, size);
 458 +       bs->remaining_bytes -= size;
 459 +}
 460 +
 461 +static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
 462 +{
 463 +       struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
 464 +       u16 msg_ctl;
 465 +       u16 cmd;
 466 +
 467 +       dev_dbg(&spi->dev, "txrx: tx %p, rx %p, len %d\n",
 468 +               t->tx_buf, t->rx_buf, t->len);
 469 +
 470 +       /* Transmitter is inhibited */
 471 +       bs->tx_ptr = t->tx_buf;
 472 +       bs->rx_ptr = t->rx_buf;
 473 +       init_completion(&bs->done);
 474 +
 475 +       if (t->tx_buf) {
 476 +               bs->remaining_bytes = t->len;
 477 +               bcm63xx_spi_fill_tx_fifo(bs);
 478 +       }
 479 +
 480 +       /* Enable the command done interrupt which
 481 +        * we use to determine completion of a command */
 482 +       bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
 483 +
 484 +       /* Fill in the Message control register */
 485 +       msg_ctl = (t->len << SPI_BYTE_CNT_SHIFT);
 486 +
 487 +       if (t->rx_buf && t->tx_buf)
 488 +               msg_ctl |= (SPI_FD_RW << SPI_MSG_TYPE_SHIFT);
 489 +       else if (t->rx_buf)
 490 +               msg_ctl |= (SPI_HD_R << SPI_MSG_TYPE_SHIFT);
 491 +       else if (t->tx_buf)
 492 +               msg_ctl |= (SPI_HD_W << SPI_MSG_TYPE_SHIFT);
 493 +
 494 +       bcm_spi_writew(bs, msg_ctl, SPI_MSG_CTL);
 495 +
 496 +       /* Issue the transfer */
 497 +       cmd = SPI_CMD_START_IMMEDIATE;
 498 +       cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
 499 +       cmd |= (spi->chip_select << SPI_CMD_DEVICE_ID_SHIFT);
 500 +       bcm_spi_writew(bs, cmd, SPI_CMD);
 501 +       wait_for_completion(&bs->done);
 502 +
 503 +       /* Disable the CMD_DONE interrupt */
 504 +       bcm_spi_writeb(bs, 0, SPI_INT_MASK);
 505 +
 506 +       return t->len - bs->remaining_bytes;
 507 +}
 508 +
 509 +static int bcm63xx_transfer(struct spi_device *spi, struct spi_message *m)
 510 +{
 511 +       struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
 512 +       struct spi_transfer *t;
 513 +       int ret = 0;
 514 +
 515 +       if (unlikely(list_empty(&m->transfers)))
 516 +               return -EINVAL;
 517 +
 518 +       if (bs->stopping)
 519 +               return -ESHUTDOWN;
 520 +
 521 +       list_for_each_entry(t, &m->transfers, transfer_list) {
 522 +               ret += bcm63xx_txrx_bufs(spi, t);
 523 +       }
 524 +
 525 +       m->complete(m->context);
 526 +
 527 +       return ret;
 528 +}
 529 +
 530 +/* This driver supports single master mode only. Hence
 531 + * CMD_DONE is the only interrupt we care about
 532 + */
 533 +static irqreturn_t bcm63xx_spi_interrupt(int irq, void *dev_id)
 534 +{
 535 +       struct spi_master *master = (struct spi_master *)dev_id;
 536 +       struct bcm63xx_spi *bs = spi_master_get_devdata(master);
 537 +       u8 intr;
 538 +       u16 cmd;
 539 +
 540 +       /* Read interupts and clear them immediately */
 541 +       intr = bcm_spi_readb(bs, SPI_INT_STATUS);
 542 +       bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS);
 543 +       bcm_spi_writeb(bs, 0, SPI_INT_MASK);
 544 +
 545 +       /* A tansfer completed */
 546 +       if (intr & SPI_INTR_CMD_DONE) {
 547 +               u8 rx_tail;
 548 +
 549 +               rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL);
 550 +
 551 +               /* Read out all the data */
 552 +               if (rx_tail)
 553 +                       memcpy_fromio(bs->rx_ptr, bs->rx_io, rx_tail);
 554 +
 555 +               /* See if there is more data to send */
 556 +               if (bs->remaining_bytes > 0) {
 557 +                       bcm63xx_spi_fill_tx_fifo(bs);
 558 +
 559 +                       /* Start the transfer */
 560 +                       bcm_spi_writew(bs, SPI_HD_W << SPI_MSG_TYPE_SHIFT,
 561 +                                      SPI_MSG_CTL);
 562 +                       cmd = bcm_spi_readw(bs, SPI_CMD);
 563 +                       cmd |= SPI_CMD_START_IMMEDIATE;
 564 +                       cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
 565 +                       bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
 566 +                       bcm_spi_writew(bs, cmd, SPI_CMD);
 567 +               } else {
 568 +                       complete(&bs->done);
 569 +               }
 570 +       }
 571 +
 572 +       return IRQ_HANDLED;
 573 +}
 574 +
 575 +
 576 +static int __init bcm63xx_spi_probe(struct platform_device *pdev)
 577 +{
 578 +       struct resource *r;
 579 +       struct device *dev = &pdev->dev;
 580 +       struct bcm63xx_spi_pdata *pdata = pdev->dev.platform_data;
 581 +       int irq;
 582 +       struct spi_master *master;
 583 +       struct clk *clk;
 584 +       struct bcm63xx_spi *bs;
 585 +       int ret;
 586 +
 587 +       r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 588 +       if (!r) {
 589 +               dev_err(dev, "no iomem\n");
 590 +               ret = -ENXIO;
 591 +               goto out;
 592 +       }
 593 +
 594 +       irq = platform_get_irq(pdev, 0);
 595 +       if (irq < 0) {
 596 +               dev_err(dev, "no irq\n");
 597 +               ret = -ENXIO;
 598 +               goto out;
 599 +       }
 600 +
 601 +       clk = clk_get(dev, "spi");
 602 +       if (IS_ERR(clk)) {
 603 +               dev_err(dev, "no clock for device\n");
 604 +               ret = -ENODEV;
 605 +               goto out;
 606 +       }
 607 +
 608 +       master = spi_alloc_master(dev, sizeof(*bs));
 609 +       if (!master) {
 610 +               dev_err(dev, "out of memory\n");
 611 +               ret = -ENOMEM;
 612 +               goto out_free;
 613 +       }
 614 +
 615 +       bs = spi_master_get_devdata(master);
 616 +       init_completion(&bs->done);
 617 +
 618 +       platform_set_drvdata(pdev, master);
 619 +       bs->pdev = pdev;
 620 +
 621 +       if (!request_mem_region(r->start, r->end - r->start, PFX)) {
 622 +               dev_err(dev, "iomem request failed\n");
 623 +               ret = -ENXIO;
 624 +               goto out_put_master;
 625 +       }
 626 +
 627 +       bs->regs = ioremap_nocache(r->start, r->end - r->start);
 628 +       if (!bs->regs) {
 629 +               dev_err(dev, "unable to ioremap regs\n");
 630 +               ret = -ENOMEM;
 631 +               goto out_put_master;
 632 +       }
 633 +       bs->irq = irq;
 634 +       bs->clk = clk;
 635 +       bs->fifo_size = pdata->fifo_size;
 636 +
 637 +       ret = request_irq(irq, bcm63xx_spi_interrupt, 0, pdev->name, master);
 638 +       if (ret) {
 639 +               dev_err(dev, "unable to request irq\n");
 640 +               goto out_unmap;
 641 +       }
 642 +
 643 +       master->bus_num = pdata->bus_num;
 644 +       master->num_chipselect = pdata->num_chipselect;
 645 +       master->setup = bcm63xx_spi_setup;
 646 +       master->transfer = bcm63xx_transfer;
 647 +       bs->speed_hz = pdata->speed_hz;
 648 +       bs->stopping = 0;
 649 +       bs->tx_io = (u8*)(bs->regs + bcm63xx_spireg(SPI_MSG_DATA));
 650 +       bs->rx_io = (const u8*)(bs->regs + bcm63xx_spireg(SPI_RX_DATA));
 651 +       spin_lock_init(&bs->lock);
 652 +
 653 +       /* Initialize hardware */
 654 +       clk_enable(bs->clk);
 655 +       bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS);
 656 +
 657 +       /* register and we are done */
 658 +       ret = spi_register_master(master);
 659 +       if (ret) {
 660 +               dev_err(dev, "spi register failed\n");
 661 +               goto out_reset_hw;
 662 +       }
 663 +
 664 +       dev_info(dev, "at 0x%08x (irq %d, FIFOs size %d) v%s\n",
 665 +                r->start, irq, bs->fifo_size, DRV_VER);
 666 +
 667 +       return 0;
 668 +
 669 +out_reset_hw:
 670 +       clk_disable(clk);
 671 +       free_irq(irq, master);
 672 +out_unmap:
 673 +       iounmap(bs->regs);
 674 +out_put_master:
 675 +       spi_master_put(master);
 676 +out_free:
 677 +       clk_put(clk);
 678 +out:
 679 +       return ret;
 680 +}
 681 +
 682 +static int __exit bcm63xx_spi_remove(struct platform_device *pdev)
 683 +{
 684 +       struct spi_master       *master = platform_get_drvdata(pdev);
 685 +       struct bcm63xx_spi      *bs = spi_master_get_devdata(master);
 686 +       struct resource         *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 687 +
 688 +       /* reset spi block */
 689 +       bcm_spi_writeb(bs, 0, SPI_INT_MASK);
 690 +       spin_lock(&bs->lock);
 691 +       bs->stopping = 1;
 692 +
 693 +       /* HW shutdown */
 694 +       clk_disable(bs->clk);
 695 +       clk_put(bs->clk);
 696 +
 697 +       spin_unlock(&bs->lock);
 698 +
 699 +       free_irq(bs->irq, master);
 700 +       iounmap(bs->regs);
 701 +       release_mem_region(r->start, r->end - r->start);
 702 +       platform_set_drvdata(pdev, 0);
 703 +       spi_unregister_master(master);
 704 +
 705 +       return 0;
 706 +}
 707 +
 708 +#ifdef CONFIG_PM
 709 +static int bcm63xx_spi_suspend(struct platform_device *pdev, pm_message_t mesg)
 710 +{
 711 +       struct spi_master       *master = platform_get_drvdata(pdev);
 712 +       struct bcm63xx_spi      *bs = spi_master_get_devdata(master);
 713 +
 714 +        clk_disable(bs->clk);
 715 +
 716 +       return 0;
 717 +}
 718 +
 719 +static int bcm63xx_spi_resume(struct platform_device *pdev)
 720 +{
 721 +       struct spi_master       *master = platform_get_drvdata(pdev);
 722 +       struct bcm63xx_spi      *bs = spi_master_get_devdata(master);
 723 +
 724 +       clk_enable(bs->clk);
 725 +
 726 +       return 0;
 727 +}
 728 +#else
 729 +#define bcm63xx_spi_suspend    NULL
 730 +#define bcm63xx_spi_resume     NULL
 731 +#endif
 732 +
 733 +static struct platform_driver bcm63xx_spi_driver = {
 734 +       .driver = {
 735 +               .name   = "bcm63xx-spi",
 736 +               .owner  = THIS_MODULE,
 737 +       },
 738 +       .probe          = bcm63xx_spi_probe,
 739 +       .remove         = __exit_p(bcm63xx_spi_remove),
 740 +       .suspend        = bcm63xx_spi_suspend,
 741 +       .resume         = bcm63xx_spi_resume,
 742 +};
 743 +
 744 +
 745 +static int __init bcm63xx_spi_init(void)
 746 +{
 747 +       return platform_driver_register(&bcm63xx_spi_driver);
 748 +}
 749 +
 750 +static void __exit bcm63xx_spi_exit(void)
 751 +{
 752 +       platform_driver_unregister(&bcm63xx_spi_driver);
 753 +}
 754 +
 755 +module_init(bcm63xx_spi_init);
 756 +module_exit(bcm63xx_spi_exit);
 757 +
 758 +MODULE_ALIAS("platform:bcm63xx_spi");
 759 +MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
 760 +MODULE_AUTHOR("Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>");
 761 +MODULE_DESCRIPTION("Broadcom BCM63xx SPI Controller driver");
 762 +MODULE_LICENSE("GPL");
 763 +MODULE_VERSION(DRV_VER);
 764 --- a/drivers/spi/Kconfig
 765 +++ b/drivers/spi/Kconfig
 766 @@ -74,6 +74,12 @@ config SPI_ATMEL
 767           This selects a driver for the Atmel SPI Controller, present on
 768           many AT32 (AVR32) and AT91 (ARM) chips.
 769
 770 +config SPI_BCM63XX
 771 +       tristate "Broadcom BCM63xx SPI controller"
 772 +       depends on BCM63XX
 773 +       help
 774 +         This is the SPI controller master driver for Broadcom BCM63xx SoC.
 775 +
 776  config SPI_BFIN
 777         tristate "SPI controller driver for ADI Blackfin5xx"
 778         depends on BLACKFIN
 779 --- a/drivers/spi/Makefile
 780 +++ b/drivers/spi/Makefile
 781 @@ -14,6 +14,7 @@ obj-$(CONFIG_SPI_ALTERA)              += spi-altera.
 782  obj-$(CONFIG_SPI_ATMEL)                        += spi-atmel.o
 783  obj-$(CONFIG_SPI_ATH79)                        += spi-ath79.o
 784  obj-$(CONFIG_SPI_AU1550)               += spi-au1550.o
 785 +obj-$(CONFIG_SPI_BCM63XX)              += bcm63xx_spi.o
 786  obj-$(CONFIG_SPI_BFIN)                 += spi-bfin5xx.o
 787  obj-$(CONFIG_SPI_BFIN_SPORT)           += spi-bfin-sport.o
 788  obj-$(CONFIG_SPI_BITBANG)              += spi-bitbang.o
 789 --- /dev/null
 790 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
 791 @@ -0,0 +1,85 @@
 792 +#ifndef BCM63XX_DEV_SPI_H
 793 +#define BCM63XX_DEV_SPI_H
 794 +
 795 +#include <linux/types.h>
 796 +#include <bcm63xx_io.h>
 797 +#include <bcm63xx_regs.h>
 798 +
 799 +int __init bcm63xx_spi_register(void);
 800 +
 801 +struct bcm63xx_spi_pdata {
 802 +       unsigned int    fifo_size;
 803 +       int             bus_num;
 804 +       int             num_chipselect;
 805 +       u32             speed_hz;
 806 +};
 807 +
 808 +enum bcm63xx_regs_spi {
 809 +        SPI_CMD,
 810 +        SPI_INT_STATUS,
 811 +        SPI_INT_MASK_ST,
 812 +        SPI_INT_MASK,
 813 +        SPI_ST,
 814 +        SPI_CLK_CFG,
 815 +        SPI_FILL_BYTE,
 816 +        SPI_MSG_TAIL,
 817 +        SPI_RX_TAIL,
 818 +        SPI_MSG_CTL,
 819 +        SPI_MSG_DATA,
 820 +        SPI_RX_DATA,
 821 +};
 822 +
 823 +#define __GEN_SPI_RSET_BASE(__cpu, __rset)                             \
 824 +       case SPI_## __rset:                                             \
 825 +               return SPI_BCM_## __cpu ##_SPI_## __rset;
 826 +
 827 +#define __GEN_SPI_RSET(__cpu)                                          \
 828 +       switch (reg) {                                                  \
 829 +       __GEN_SPI_RSET_BASE(__cpu, CMD)                                 \
 830 +       __GEN_SPI_RSET_BASE(__cpu, INT_STATUS)                          \
 831 +       __GEN_SPI_RSET_BASE(__cpu, INT_MASK_ST)                         \
 832 +       __GEN_SPI_RSET_BASE(__cpu, INT_MASK)                            \
 833 +       __GEN_SPI_RSET_BASE(__cpu, ST)                                  \
 834 +       __GEN_SPI_RSET_BASE(__cpu, CLK_CFG)                             \
 835 +       __GEN_SPI_RSET_BASE(__cpu, FILL_BYTE)                           \
 836 +       __GEN_SPI_RSET_BASE(__cpu, MSG_TAIL)                            \
 837 +       __GEN_SPI_RSET_BASE(__cpu, RX_TAIL)                             \
 838 +       __GEN_SPI_RSET_BASE(__cpu, MSG_CTL)                             \
 839 +       __GEN_SPI_RSET_BASE(__cpu, MSG_DATA)                            \
 840 +       __GEN_SPI_RSET_BASE(__cpu, RX_DATA)                             \
 841 +       }
 842 +
 843 +#define __GEN_SPI_REGS_TABLE(__cpu)                                    \
 844 +       [SPI_CMD]               = SPI_BCM_## __cpu ##_SPI_CMD,          \
 845 +       [SPI_INT_STATUS]        = SPI_BCM_## __cpu ##_SPI_INT_STATUS,   \
 846 +       [SPI_INT_MASK_ST]       = SPI_BCM_## __cpu ##_SPI_INT_MASK_ST,  \
 847 +       [SPI_INT_MASK]          = SPI_BCM_## __cpu ##_SPI_INT_MASK,     \
 848 +       [SPI_ST]                = SPI_BCM_## __cpu ##_SPI_ST,           \
 849 +       [SPI_CLK_CFG]           = SPI_BCM_## __cpu ##_SPI_CLK_CFG,      \
 850 +       [SPI_FILL_BYTE]         = SPI_BCM_## __cpu ##_SPI_FILL_BYTE,    \
 851 +       [SPI_MSG_TAIL]          = SPI_BCM_## __cpu ##_SPI_MSG_TAIL,     \
 852 +       [SPI_RX_TAIL]           = SPI_BCM_## __cpu ##_SPI_RX_TAIL,      \
 853 +       [SPI_MSG_CTL]           = SPI_BCM_## __cpu ##_SPI_MSG_CTL,      \
 854 +       [SPI_MSG_DATA]          = SPI_BCM_## __cpu ##_SPI_MSG_DATA,     \
 855 +       [SPI_RX_DATA]           = SPI_BCM_## __cpu ##_SPI_RX_DATA,
 856 +
 857 +static inline unsigned long bcm63xx_spireg(enum bcm63xx_regs_spi reg)
 858 +{
 859 +#ifdef BCMCPU_RUNTIME_DETECT
 860 +       extern const unsigned long *bcm63xx_regs_spi;
 861 +        return bcm63xx_regs_spi[reg];
 862 +#else
 863 +#ifdef CONFIG_BCM63XX_CPU_6338
 864 +       __GEN_SPI_RSET(6338)
 865 +#endif
 866 +#ifdef CONFIG_BCM63XX_CPU_6348
 867 +       __GEN_SPI_RSET(6348)
 868 +#endif
 869 +#ifdef CONFIG_BCM63XX_CPU_6358
 870 +       __GEN_SPI_RSET(6358)
 871 +#endif
 872 +#endif
 873 +       return 0;
 874 +}
 875 +
 876 +#endif /* BCM63XX_DEV_SPI_H */
 877 --- a/arch/mips/bcm63xx/Makefile
 878 +++ b/arch/mips/bcm63xx/Makefile
 879 @@ -1,5 +1,5 @@
 880  obj-y          += clk.o cpu.o cs.o gpio.o irq.o prom.o setup.o timer.o \
 881 -                  dev-dsp.o dev-enet.o dev-pcmcia.o dev-uart.o \
 882 +                  dev-dsp.o dev-enet.o dev-pcmcia.o dev-spi.o dev-uart.o \
 883                    dev-usb-ehci.o dev-usb-ohci.o dev-usb-udc.o dev-wdt.o
 884  obj-$(CONFIG_EARLY_PRINTK)     += early_printk.o
 885
 886 --- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
 887 +++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
 888 @@ -31,6 +31,7 @@
 889  #include <bcm63xx_dev_usb_ohci.h>
 890  #include <bcm63xx_dev_usb_ehci.h>
 891  #include <bcm63xx_dev_usb_udc.h>
 892 +#include <bcm63xx_dev_spi.h>
 893  #include <board_bcm963xx.h>
 894
 895  #define PFX    "board_bcm963xx: "
 896 @@ -955,6 +956,8 @@ int __init board_register_devices(void)
 897         if (board.num_spis)
 898                 spi_register_board_info(board.spis, board.num_spis);
 899
 900 +       bcm63xx_spi_register();
 901 +
 902         /* read base address of boot chip select (0) */
 903         val = bcm_mpi_readl(MPI_CSBASE_REG(0));
 904         val &= MPI_CSBASE_BASE_MASK;