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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +05302/*
3 * SPI flash probing
4 *
5 * Copyright (C) 2008 Atmel Corporation
6 * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
7 * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +05308 */
9
10#include <common.h>
Simon Glassfbb09912014-10-13 23:42:07 -060011#include <dm.h>
Simon Glassae242cb2014-10-13 23:42:05 -060012#include <errno.h>
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053013#include <malloc.h>
14#include <spi.h>
15#include <spi_flash.h>
16
Jagannadha Sutradharudu Teki898e76c2013-09-26 16:00:15 +053017#include "sf_internal.h"
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053018
Simon Glassae242cb2014-10-13 23:42:05 -060019/**
20 * spi_flash_probe_slave() - Probe for a SPI flash device on a bus
21 *
Simon Glassae242cb2014-10-13 23:42:05 -060022 * @flashp: Pointer to place to put flash info, which may be NULL if the
23 * space should be allocated
24 */
Jagan Teki339fd6d2015-12-06 21:44:12 +053025static int spi_flash_probe_slave(struct spi_flash *flash)
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053026{
Jagan Tekibfdb07e2015-12-06 21:33:32 +053027 struct spi_slave *spi = flash->spi;
Jagannadha Sutradharudu Teki4d4ec992013-09-24 16:01:23 +053028 int ret;
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053029
Jagannadha Sutradharudu Teki4d4ec992013-09-24 16:01:23 +053030 /* Setup spi_slave */
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053031 if (!spi) {
32 printf("SF: Failed to set up slave\n");
Simon Glassae242cb2014-10-13 23:42:05 -060033 return -ENODEV;
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053034 }
35
Jagannadha Sutradharudu Teki4d4ec992013-09-24 16:01:23 +053036 /* Claim spi bus */
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053037 ret = spi_claim_bus(spi);
38 if (ret) {
39 debug("SF: Failed to claim SPI bus: %d\n", ret);
Simon Glassae242cb2014-10-13 23:42:05 -060040 return ret;
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053041 }
42
Jagan Tekibfdb07e2015-12-06 21:33:32 +053043 ret = spi_flash_scan(flash);
Simon Glass0badb23d2016-02-24 09:14:56 -070044 if (ret)
Jagannadha Sutradharudu Teki4d4ec992013-09-24 16:01:23 +053045 goto err_read_id;
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053046
Daniel Schwierzeck9fe6d872015-04-27 07:42:04 +020047#ifdef CONFIG_SPI_FLASH_MTD
48 ret = spi_flash_mtd_register(flash);
49#endif
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053050
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053051err_read_id:
52 spi_release_bus(spi);
Simon Glassae242cb2014-10-13 23:42:05 -060053 return ret;
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053054}
55
Simon Glassfbb09912014-10-13 23:42:07 -060056#ifndef CONFIG_DM_SPI_FLASH
Mario Six36890ff2018-01-15 11:08:42 +010057struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs,
58 unsigned int max_hz, unsigned int spi_mode)
Simon Glassae242cb2014-10-13 23:42:05 -060059{
Mario Six36890ff2018-01-15 11:08:42 +010060 struct spi_slave *bus;
Simon Glassae242cb2014-10-13 23:42:05 -060061 struct spi_flash *flash;
62
Mario Six36890ff2018-01-15 11:08:42 +010063 bus = spi_setup_slave(busnum, cs, max_hz, spi_mode);
64 if (!bus)
65 return NULL;
66
Simon Glassae242cb2014-10-13 23:42:05 -060067 /* Allocate space if needed (not used by sf-uclass */
68 flash = calloc(1, sizeof(*flash));
69 if (!flash) {
70 debug("SF: Failed to allocate spi_flash\n");
71 return NULL;
72 }
73
Jagan Tekibfdb07e2015-12-06 21:33:32 +053074 flash->spi = bus;
75 if (spi_flash_probe_slave(flash)) {
Simon Glassae242cb2014-10-13 23:42:05 -060076 spi_free_slave(bus);
77 free(flash);
78 return NULL;
79 }
80
81 return flash;
82}
83
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053084void spi_flash_free(struct spi_flash *flash)
85{
Daniel Schwierzeck9fe6d872015-04-27 07:42:04 +020086#ifdef CONFIG_SPI_FLASH_MTD
87 spi_flash_mtd_unregister();
88#endif
Jagannadha Sutradharudu Teki4d5e29a2013-08-29 19:01:56 +053089 spi_free_slave(flash->spi);
90 free(flash);
91}
Simon Glassfbb09912014-10-13 23:42:07 -060092
93#else /* defined CONFIG_DM_SPI_FLASH */
94
95static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len,
96 void *buf)
97{
Simon Glasse564f052015-03-05 12:25:20 -070098 struct spi_flash *flash = dev_get_uclass_priv(dev);
Simon Glassfbb09912014-10-13 23:42:07 -060099
Simon Glass5e24a2e2018-10-01 12:22:24 -0600100 return log_ret(spi_flash_cmd_read_ops(flash, offset, len, buf));
Simon Glassfbb09912014-10-13 23:42:07 -0600101}
102
Jagan Teki339fd6d2015-12-06 21:44:12 +0530103static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len,
Mario Sixa3e32c52018-01-15 11:08:40 +0100104 const void *buf)
Simon Glassfbb09912014-10-13 23:42:07 -0600105{
Simon Glasse564f052015-03-05 12:25:20 -0700106 struct spi_flash *flash = dev_get_uclass_priv(dev);
Simon Glassfbb09912014-10-13 23:42:07 -0600107
Bin Meng074eed52015-04-24 19:51:10 +0800108#if defined(CONFIG_SPI_FLASH_SST)
Jagan Teki1fabefd2015-09-29 11:17:02 +0530109 if (flash->flags & SNOR_F_SST_WR) {
Jagan Tekicdf33932015-12-13 20:12:45 +0530110 if (flash->spi->mode & SPI_TX_BYTE)
Bin Meng074eed52015-04-24 19:51:10 +0800111 return sst_write_bp(flash, offset, len, buf);
112 else
113 return sst_write_wp(flash, offset, len, buf);
114 }
115#endif
116
Simon Glassfbb09912014-10-13 23:42:07 -0600117 return spi_flash_cmd_write_ops(flash, offset, len, buf);
118}
119
Jagan Teki339fd6d2015-12-06 21:44:12 +0530120static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len)
Simon Glassfbb09912014-10-13 23:42:07 -0600121{
Simon Glasse564f052015-03-05 12:25:20 -0700122 struct spi_flash *flash = dev_get_uclass_priv(dev);
Simon Glassfbb09912014-10-13 23:42:07 -0600123
124 return spi_flash_cmd_erase_ops(flash, offset, len);
125}
126
Jagan Teki339fd6d2015-12-06 21:44:12 +0530127static int spi_flash_std_probe(struct udevice *dev)
Simon Glassfbb09912014-10-13 23:42:07 -0600128{
Simon Glassbcbe3d12015-09-28 23:32:01 -0600129 struct spi_slave *slave = dev_get_parent_priv(dev);
Simon Glassd0cff032015-01-25 08:27:12 -0700130 struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
Simon Glassfbb09912014-10-13 23:42:07 -0600131 struct spi_flash *flash;
132
Simon Glasse564f052015-03-05 12:25:20 -0700133 flash = dev_get_uclass_priv(dev);
Simon Glassfbb09912014-10-13 23:42:07 -0600134 flash->dev = dev;
Jagan Tekibfdb07e2015-12-06 21:33:32 +0530135 flash->spi = slave;
Simon Glassd0cff032015-01-25 08:27:12 -0700136 debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs);
Jagan Tekibfdb07e2015-12-06 21:33:32 +0530137 return spi_flash_probe_slave(flash);
Simon Glassfbb09912014-10-13 23:42:07 -0600138}
139
140static const struct dm_spi_flash_ops spi_flash_std_ops = {
141 .read = spi_flash_std_read,
142 .write = spi_flash_std_write,
143 .erase = spi_flash_std_erase,
144};
145
146static const struct udevice_id spi_flash_std_ids[] = {
147 { .compatible = "spi-flash" },
148 { }
149};
150
151U_BOOT_DRIVER(spi_flash_std) = {
152 .name = "spi_flash_std",
153 .id = UCLASS_SPI_FLASH,
154 .of_match = spi_flash_std_ids,
155 .probe = spi_flash_std_probe,
156 .priv_auto_alloc_size = sizeof(struct spi_flash),
157 .ops = &spi_flash_std_ops,
158};
159
160#endif /* CONFIG_DM_SPI_FLASH */