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
  14 DECLARE_GLOBAL_DATA_PTR;
  15
  16 int 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
  21 int 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
  27 int 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  */
  36 struct 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
  47 void spi_flash_free(struct spi_flash *flash)
  48 {
  49         spi_flash_remove(flash->spi->dev);
  50 }
  51
  52 int 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 name[30], *str;
  59         int ret;
  60
  61         snprintf(name, sizeof(name), "spi_flash@%d:%d", busnum, cs);
  62         str = strdup(name);
  63         ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
  64                                   "spi_flash_std", str, &bus, &slave);
  65         if (ret)
  66                 return ret;
  67
  68         *devp = slave->dev;
  69         return 0;
  70 }
  71
  72 int spi_flash_remove(struct udevice *dev)
  73 {
  74         return device_remove(dev);
  75 }
  76
  77 static int spi_flash_post_bind(struct udevice *dev)
  78 {
  79 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
  80         struct dm_spi_flash_ops *ops = sf_get_ops(dev);
  81         static int reloc_done;
  82
  83         if (!reloc_done) {
  84                 if (ops->read)
  85                         ops->read += gd->reloc_off;
  86                 if (ops->write)
  87                         ops->write += gd->reloc_off;
  88                 if (ops->erase)
  89                         ops->erase += gd->reloc_off;
  90
  91                 reloc_done++;
  92         }
  93 #endif
  94         return 0;
  95 }
  96
  97 UCLASS_DRIVER(spi_flash) = {
  98         .id             = UCLASS_SPI_FLASH,
  99         .name           = "spi_flash",
 100         .post_bind      = spi_flash_post_bind,
 101         .per_device_auto_alloc_size = sizeof(struct spi_flash),
 102 };