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 <malloc.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 log_ret(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 log_ret(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 log_ret(sf_get_ops(dev)->erase(dev, offset, len));
  30 }
  31
  32 int spl_flash_get_sw_write_prot(struct udevice *dev)
  33 {
  34         struct dm_spi_flash_ops *ops = sf_get_ops(dev);
  35
  36         if (!ops->get_sw_write_prot)
  37                 return -ENOSYS;
  38         return log_ret(ops->get_sw_write_prot(dev));
  39 }
  40
  41 /*
  42  * TODO(sjg@chromium.org): This is an old-style function. We should remove
  43  * it when all SPI flash drivers use dm
  44  */
  45 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
  46                                   unsigned int max_hz, unsigned int spi_mode)
  47 {
  48         struct udevice *dev;
  49
  50         if (spi_flash_probe_bus_cs(bus, cs, max_hz, spi_mode, &dev))
  51                 return NULL;
  52
  53         return dev_get_uclass_priv(dev);
  54 }
  55
  56 void spi_flash_free(struct spi_flash *flash)
  57 {
  58         device_remove(flash->spi->dev, DM_REMOVE_NORMAL);
  59 }
  60
  61 int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
  62                            unsigned int max_hz, unsigned int spi_mode,
  63                            struct udevice **devp)
  64 {
  65         struct spi_slave *slave;
  66         struct udevice *bus;
  67         char *str;
  68         int ret;
  69
  70 #if defined(CONFIG_SPL_BUILD) && CONFIG_IS_ENABLED(USE_TINY_PRINTF)
  71         str = "spi_flash";
  72 #else
  73         char name[30];
  74
  75         snprintf(name, sizeof(name), "spi_flash@%d:%d", busnum, cs);
  76         str = strdup(name);
  77 #endif
  78         ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
  79                                   "spi_flash_std", str, &bus, &slave);
  80         if (ret)
  81                 return ret;
  82
  83         *devp = slave->dev;
  84         return 0;
  85 }
  86
  87 static int spi_flash_post_bind(struct udevice *dev)
  88 {
  89 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
  90         struct dm_spi_flash_ops *ops = sf_get_ops(dev);
  91         static int reloc_done;
  92
  93         if (!reloc_done) {
  94                 if (ops->read)
  95                         ops->read += gd->reloc_off;
  96                 if (ops->write)
  97                         ops->write += gd->reloc_off;
  98                 if (ops->erase)
  99                         ops->erase += gd->reloc_off;
 100
 101                 reloc_done++;
 102         }
 103 #endif
 104         return 0;
 105 }
 106
 107 UCLASS_DRIVER(spi_flash) = {
 108         .id             = UCLASS_SPI_FLASH,
 109         .name           = "spi_flash",
 110         .post_bind      = spi_flash_post_bind,
 111         .per_device_auto_alloc_size = sizeof(struct spi_flash),
 112 };