drivers/mtd/spi/sf-uclass.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2014 Google, Inc
   4  */
   5
   6 #define LOG_CATEGORY UCLASS_SPI_FLASH
   7
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <log.h>
  11 #include <malloc.h>
  12 #include <spi.h>
  13 #include <spi_flash.h>
  14 #include <asm/global_data.h>
  15 #include <dm/device-internal.h>
  16 #include "sf_internal.h"
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf)
  21 {
  22         return log_ret(sf_get_ops(dev)->read(dev, offset, len, buf));
  23 }
  24
  25 int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
  26                        const void *buf)
  27 {
  28         return log_ret(sf_get_ops(dev)->write(dev, offset, len, buf));
  29 }
  30
  31 int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len)
  32 {
  33         return log_ret(sf_get_ops(dev)->erase(dev, offset, len));
  34 }
  35
  36 int spl_flash_get_sw_write_prot(struct udevice *dev)
  37 {
  38         struct dm_spi_flash_ops *ops = sf_get_ops(dev);
  39
  40         if (!ops->get_sw_write_prot)
  41                 return -ENOSYS;
  42         return log_ret(ops->get_sw_write_prot(dev));
  43 }
  44
  45 /*
  46  * TODO(sjg@chromium.org): This is an old-style function. We should remove
  47  * it when all SPI flash drivers use dm
  48  */
  49 struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs,
  50                                   unsigned int max_hz, unsigned int spi_mode)
  51 {
  52         struct spi_slave *slave;
  53         struct udevice *bus;
  54         char *str;
  55
  56 #if defined(CONFIG_SPL_BUILD) && CONFIG_IS_ENABLED(USE_TINY_PRINTF)
  57         str = "spi_flash";
  58 #else
  59         char name[30];
  60
  61         snprintf(name, sizeof(name), "spi_flash@%d:%d", busnum, cs);
  62         str = strdup(name);
  63 #endif
  64
  65         if (_spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
  66                                 "jedec_spi_nor", str, &bus, &slave))
  67                 return NULL;
  68
  69         return dev_get_uclass_priv(slave->dev);
  70 }
  71
  72 int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
  73                            struct udevice **devp)
  74 {
  75         struct spi_slave *slave;
  76         struct udevice *bus;
  77         int ret;
  78
  79         ret = spi_get_bus_and_cs(busnum, cs, &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        = sizeof(struct spi_nor),
 112 };