drivers/mtd/spi/sf-uclass.c

   1 /*
   2  * Copyright (c) 2014 Google, Inc
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <spi.h>
  10 #include <spi_flash.h>
  11 #include <dm/device-internal.h>
  12 #include "sf_internal.h"
  13
  14 int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf)
  15 {
  16         return sf_get_ops(dev)->read(dev, offset, len, buf);
  17 }
  18
  19 int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
  20                        const void *buf)
  21 {
  22         return sf_get_ops(dev)->write(dev, offset, len, buf);
  23 }
  24
  25 int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len)
  26 {
  27         return sf_get_ops(dev)->erase(dev, offset, len);
  28 }
  29
  30 /*
  31  * TODO(sjg@chromium.org): This is an old-style function. We should remove
  32  * it when all SPI flash drivers use dm
  33  */
  34 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
  35                                   unsigned int max_hz, unsigned int spi_mode)
  36 {
  37         struct udevice *dev;
  38
  39         if (spi_flash_probe_bus_cs(bus, cs, max_hz, spi_mode, &dev))
  40                 return NULL;
  41
  42         return dev_get_uclass_priv(dev);
  43 }
  44
  45 void spi_flash_free(struct spi_flash *flash)
  46 {
  47         spi_flash_remove(flash->spi->dev);
  48 }
  49
  50 int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
  51                            unsigned int max_hz, unsigned int spi_mode,
  52                            struct udevice **devp)
  53 {
  54         struct spi_slave *slave;
  55         struct udevice *bus;
  56         char name[20], *str;
  57         int ret;
  58
  59         snprintf(name, sizeof(name), "%d:%d", busnum, cs);
  60         str = strdup(name);
  61         ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
  62                                   "spi_flash_std", str, &bus, &slave);
  63         if (ret)
  64                 return ret;
  65
  66         *devp = slave->dev;
  67         return 0;
  68 }
  69
  70 int spi_flash_remove(struct udevice *dev)
  71 {
  72         return device_remove(dev);
  73 }
  74
  75 UCLASS_DRIVER(spi_flash) = {
  76         .id             = UCLASS_SPI_FLASH,
  77         .name           = "spi_flash",
  78         .per_device_auto_alloc_size = sizeof(struct spi_flash),
  79 };