drivers/mtd/spi/sf-uclass.c

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