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 log_ret(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 log_ret(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 log_ret(sf_get_ops(dev)->erase(dev, offset, len));
  29 }
  30
  31 int spl_flash_get_sw_write_prot(struct udevice *dev)
  32 {
  33         struct dm_spi_flash_ops *ops = sf_get_ops(dev);
  34
  35         if (!ops->get_sw_write_prot)
  36                 return -ENOSYS;
  37         return log_ret(ops->get_sw_write_prot(dev));
  38 }
  39
  40 /*
  41  * TODO(sjg@chromium.org): This is an old-style function. We should remove
  42  * it when all SPI flash drivers use dm
  43  */
  44 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
  45                                   unsigned int max_hz, unsigned int spi_mode)
  46 {
  47         struct udevice *dev;
  48
  49         if (spi_flash_probe_bus_cs(bus, cs, max_hz, spi_mode, &dev))
  50                 return NULL;
  51
  52         return dev_get_uclass_priv(dev);
  53 }
  54
  55 void spi_flash_free(struct spi_flash *flash)
  56 {
  57         device_remove(flash->spi->dev, DM_REMOVE_NORMAL);
  58 }
  59
  60 int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
  61                            unsigned int max_hz, unsigned int spi_mode,
  62                            struct udevice **devp)
  63 {
  64         struct spi_slave *slave;
  65         struct udevice *bus;
  66         char *str;
  67         int ret;
  68
  69 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_USE_TINY_PRINTF)
  70         str = "spi_flash";
  71 #else
  72         char name[30];
  73
  74         snprintf(name, sizeof(name), "spi_flash@%d:%d", busnum, cs);
  75         str = strdup(name);
  76 #endif
  77         ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
  78                                   "spi_flash_std", str, &bus, &slave);
  79         if (ret)
  80                 return ret;
  81
  82         *devp = slave->dev;
  83         return 0;
  84 }
  85
  86 static int spi_flash_post_bind(struct udevice *dev)
  87 {
  88 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
  89         struct dm_spi_flash_ops *ops = sf_get_ops(dev);
  90         static int reloc_done;
  91
  92         if (!reloc_done) {
  93                 if (ops->read)
  94                         ops->read += gd->reloc_off;
  95                 if (ops->write)
  96                         ops->write += gd->reloc_off;
  97                 if (ops->erase)
  98                         ops->erase += gd->reloc_off;
  99
 100                 reloc_done++;
 101         }
 102 #endif
 103         return 0;
 104 }
 105
 106 UCLASS_DRIVER(spi_flash) = {
 107         .id             = UCLASS_SPI_FLASH,
 108         .name           = "spi_flash",
 109         .post_bind      = spi_flash_post_bind,
 110         .per_device_auto_alloc_size = sizeof(struct spi_flash),
 111 };