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Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +05301/*
2 * SPI flash probing
3 *
4 * Copyright (C) 2008 Atmel Corporation
5 * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
6 * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
7 *
Jagannadha Sutradharudu Tekid1452702013-10-10 22:32:55 +05308 * SPDX-License-Identifier: GPL-2.0+
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +05309 */
10
11#include <common.h>
Simon Glass6f7d2592014-10-13 23:42:07 -060012#include <dm.h>
Simon Glassc10c3d42014-10-13 23:42:05 -060013#include <errno.h>
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053014#include <malloc.h>
15#include <spi.h>
16#include <spi_flash.h>
17
Jagannadha Sutradharudu Tekiac8242d2013-09-26 16:00:15 +053018#include "sf_internal.h"
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053019
Simon Glassc10c3d42014-10-13 23:42:05 -060020/**
21 * spi_flash_probe_slave() - Probe for a SPI flash device on a bus
22 *
Simon Glassc10c3d42014-10-13 23:42:05 -060023 * @flashp: Pointer to place to put flash info, which may be NULL if the
24 * space should be allocated
25 */
Jagan Tekic772eaa2015-12-06 21:44:12 +053026static int spi_flash_probe_slave(struct spi_flash *flash)
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053027{
Jagan Teki4abfb982015-12-06 21:33:32 +053028 struct spi_slave *spi = flash->spi;
Jagannadha Sutradharudu Tekibb302202013-09-24 16:01:23 +053029 int ret;
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053030
Jagannadha Sutradharudu Tekibb302202013-09-24 16:01:23 +053031 /* Setup spi_slave */
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053032 if (!spi) {
33 printf("SF: Failed to set up slave\n");
Simon Glassc10c3d42014-10-13 23:42:05 -060034 return -ENODEV;
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053035 }
36
Jagannadha Sutradharudu Tekibb302202013-09-24 16:01:23 +053037 /* Claim spi bus */
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053038 ret = spi_claim_bus(spi);
39 if (ret) {
40 debug("SF: Failed to claim SPI bus: %d\n", ret);
Simon Glassc10c3d42014-10-13 23:42:05 -060041 return ret;
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053042 }
43
Jagan Teki4abfb982015-12-06 21:33:32 +053044 ret = spi_flash_scan(flash);
Simon Glass07f66712016-02-24 09:14:56 -070045 if (ret)
Jagannadha Sutradharudu Tekibb302202013-09-24 16:01:23 +053046 goto err_read_id;
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053047
Daniel Schwierzeck06cfc032015-04-27 07:42:04 +020048#ifdef CONFIG_SPI_FLASH_MTD
49 ret = spi_flash_mtd_register(flash);
50#endif
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053051
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053052err_read_id:
53 spi_release_bus(spi);
Simon Glassc10c3d42014-10-13 23:42:05 -060054 return ret;
55}
56
Simon Glass6f7d2592014-10-13 23:42:07 -060057#ifndef CONFIG_DM_SPI_FLASH
Jagan Tekic772eaa2015-12-06 21:44:12 +053058static struct spi_flash *spi_flash_probe_tail(struct spi_slave *bus)
Simon Glassc10c3d42014-10-13 23:42:05 -060059{
60 struct spi_flash *flash;
61
62 /* Allocate space if needed (not used by sf-uclass */
63 flash = calloc(1, sizeof(*flash));
64 if (!flash) {
65 debug("SF: Failed to allocate spi_flash\n");
66 return NULL;
67 }
68
Jagan Teki4abfb982015-12-06 21:33:32 +053069 flash->spi = bus;
70 if (spi_flash_probe_slave(flash)) {
Simon Glassc10c3d42014-10-13 23:42:05 -060071 spi_free_slave(bus);
72 free(flash);
73 return NULL;
74 }
75
76 return flash;
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +053077}
78
Simon Glassc10c3d42014-10-13 23:42:05 -060079struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs,
Simon Glass49e9d2c2013-12-03 16:43:24 -070080 unsigned int max_hz, unsigned int spi_mode)
81{
Simon Glassc10c3d42014-10-13 23:42:05 -060082 struct spi_slave *bus;
Simon Glass49e9d2c2013-12-03 16:43:24 -070083
Simon Glassc10c3d42014-10-13 23:42:05 -060084 bus = spi_setup_slave(busnum, cs, max_hz, spi_mode);
Peng Fan54473a42015-03-20 13:19:16 +080085 if (!bus)
86 return NULL;
Simon Glassc10c3d42014-10-13 23:42:05 -060087 return spi_flash_probe_tail(bus);
Simon Glass49e9d2c2013-12-03 16:43:24 -070088}
89
90#ifdef CONFIG_OF_SPI_FLASH
91struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
92 int spi_node)
93{
Simon Glassc10c3d42014-10-13 23:42:05 -060094 struct spi_slave *bus;
Simon Glass49e9d2c2013-12-03 16:43:24 -070095
Simon Glassc10c3d42014-10-13 23:42:05 -060096 bus = spi_setup_slave_fdt(blob, slave_node, spi_node);
Peng Fan54473a42015-03-20 13:19:16 +080097 if (!bus)
98 return NULL;
Simon Glassc10c3d42014-10-13 23:42:05 -060099 return spi_flash_probe_tail(bus);
Simon Glass49e9d2c2013-12-03 16:43:24 -0700100}
101#endif
102
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +0530103void spi_flash_free(struct spi_flash *flash)
104{
Daniel Schwierzeck06cfc032015-04-27 07:42:04 +0200105#ifdef CONFIG_SPI_FLASH_MTD
106 spi_flash_mtd_unregister();
107#endif
Jagannadha Sutradharudu Tekie9a8b822013-08-29 19:01:56 +0530108 spi_free_slave(flash->spi);
109 free(flash);
110}
Simon Glass6f7d2592014-10-13 23:42:07 -0600111
112#else /* defined CONFIG_DM_SPI_FLASH */
113
114static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len,
115 void *buf)
116{
Simon Glassde0977b2015-03-05 12:25:20 -0700117 struct spi_flash *flash = dev_get_uclass_priv(dev);
Simon Glass6f7d2592014-10-13 23:42:07 -0600118
119 return spi_flash_cmd_read_ops(flash, offset, len, buf);
120}
121
Jagan Tekic772eaa2015-12-06 21:44:12 +0530122static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len,
Simon Glass6f7d2592014-10-13 23:42:07 -0600123 const void *buf)
124{
Simon Glassde0977b2015-03-05 12:25:20 -0700125 struct spi_flash *flash = dev_get_uclass_priv(dev);
Simon Glass6f7d2592014-10-13 23:42:07 -0600126
Bin Mengfe0d0802015-04-24 19:51:10 +0800127#if defined(CONFIG_SPI_FLASH_SST)
Jagan Teki4537cec2015-09-29 11:17:02 +0530128 if (flash->flags & SNOR_F_SST_WR) {
Jagan Teki71331b32015-12-13 20:12:45 +0530129 if (flash->spi->mode & SPI_TX_BYTE)
Bin Mengfe0d0802015-04-24 19:51:10 +0800130 return sst_write_bp(flash, offset, len, buf);
131 else
132 return sst_write_wp(flash, offset, len, buf);
133 }
134#endif
135
Simon Glass6f7d2592014-10-13 23:42:07 -0600136 return spi_flash_cmd_write_ops(flash, offset, len, buf);
137}
138
Jagan Tekic772eaa2015-12-06 21:44:12 +0530139static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len)
Simon Glass6f7d2592014-10-13 23:42:07 -0600140{
Simon Glassde0977b2015-03-05 12:25:20 -0700141 struct spi_flash *flash = dev_get_uclass_priv(dev);
Simon Glass6f7d2592014-10-13 23:42:07 -0600142
143 return spi_flash_cmd_erase_ops(flash, offset, len);
144}
145
Jagan Tekic772eaa2015-12-06 21:44:12 +0530146static int spi_flash_std_probe(struct udevice *dev)
Simon Glass6f7d2592014-10-13 23:42:07 -0600147{
Simon Glassde44acf2015-09-28 23:32:01 -0600148 struct spi_slave *slave = dev_get_parent_priv(dev);
Simon Glass5d2ee052015-01-25 08:27:12 -0700149 struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
Simon Glass6f7d2592014-10-13 23:42:07 -0600150 struct spi_flash *flash;
151
Simon Glassde0977b2015-03-05 12:25:20 -0700152 flash = dev_get_uclass_priv(dev);
Simon Glass6f7d2592014-10-13 23:42:07 -0600153 flash->dev = dev;
Jagan Teki4abfb982015-12-06 21:33:32 +0530154 flash->spi = slave;
Simon Glass5d2ee052015-01-25 08:27:12 -0700155 debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs);
Jagan Teki4abfb982015-12-06 21:33:32 +0530156 return spi_flash_probe_slave(flash);
Simon Glass6f7d2592014-10-13 23:42:07 -0600157}
158
159static const struct dm_spi_flash_ops spi_flash_std_ops = {
160 .read = spi_flash_std_read,
161 .write = spi_flash_std_write,
162 .erase = spi_flash_std_erase,
163};
164
165static const struct udevice_id spi_flash_std_ids[] = {
166 { .compatible = "spi-flash" },
167 { }
168};
169
170U_BOOT_DRIVER(spi_flash_std) = {
171 .name = "spi_flash_std",
172 .id = UCLASS_SPI_FLASH,
173 .of_match = spi_flash_std_ids,
174 .probe = spi_flash_std_probe,
175 .priv_auto_alloc_size = sizeof(struct spi_flash),
176 .ops = &spi_flash_std_ops,
177};
178
179#endif /* CONFIG_DM_SPI_FLASH */