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