LXR uboot/drivers/mtd/spi/sf-uclass.c

   1/*
   2 * Copyright (c) 2014 Google, Inc
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6
   7#include <common.h>
   8#include <dm.h>
   9#include <spi.h>
  10#include <spi_flash.h>
  11#include <dm/device-internal.h>
  12#include "sf_internal.h"
  13
  14DECLARE_GLOBAL_DATA_PTR;
  15
  16int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf)
  17{
  18        return sf_get_ops(dev)->read(dev, offset, len, buf);
  19}
  20
  21int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
  22                       const void *buf)
  23{
  24        return sf_get_ops(dev)->write(dev, offset, len, buf);
  25}
  26
  27int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len)
  28{
  29        return sf_get_ops(dev)->erase(dev, offset, len);
  30}
  31
  32/*
  33 * TODO(sjg@chromium.org): This is an old-style function. We should remove
  34 * it when all SPI flash drivers use dm
  35 */
  36struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
  37                                  unsigned int max_hz, unsigned int spi_mode)
  38{
  39        struct udevice *dev;
  40
  41        if (spi_flash_probe_bus_cs(bus, cs, max_hz, spi_mode, &dev))
  42                return NULL;
  43
  44        return dev_get_uclass_priv(dev);
  45}
  46
  47void spi_flash_free(struct spi_flash *flash)
  48{
  49        device_remove(flash->spi->dev, DM_REMOVE_NORMAL);
  50}
  51
  52int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
  53                           unsigned int max_hz, unsigned int spi_mode,
  54                           struct udevice **devp)
  55{
  56        struct spi_slave *slave;
  57        struct udevice *bus;
  58        char *str;
  59        int ret;
  60
  61#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_USE_TINY_PRINTF)
  62        str = "spi_flash";
  63#else
  64        char name[30];
  65
  66        snprintf(name, sizeof(name), "spi_flash@%d:%d", busnum, cs);
  67        str = strdup(name);
  68#endif
  69        ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
  70                                  "spi_flash_std", str, &bus, &slave);
  71        if (ret)
  72                return ret;
  73
  74        *devp = slave->dev;
  75        return 0;
  76}
  77
  78static int spi_flash_post_bind(struct udevice *dev)
  79{
  80#if defined(CONFIG_NEEDS_MANUAL_RELOC)
  81        struct dm_spi_flash_ops *ops = sf_get_ops(dev);
  82        static int reloc_done;
  83
  84        if (!reloc_done) {
  85                if (ops->read)
  86                        ops->read += gd->reloc_off;
  87                if (ops->write)
  88                        ops->write += gd->reloc_off;
  89                if (ops->erase)
  90                        ops->erase += gd->reloc_off;
  91
  92                reloc_done++;
  93        }
  94#endif
  95        return 0;
  96}
  97
  98UCLASS_DRIVER(spi_flash) = {
  99        .id             = UCLASS_SPI_FLASH,
 100        .name           = "spi_flash",
 101        .post_bind      = spi_flash_post_bind,
 102        .per_device_auto_alloc_size = sizeof(struct spi_flash),
 103};
 104