183d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
2898e76c9SJagannadha Sutradharudu Teki /*
3898e76c9SJagannadha Sutradharudu Teki * SPI flash probing
4898e76c9SJagannadha Sutradharudu Teki *
5898e76c9SJagannadha Sutradharudu Teki * Copyright (C) 2008 Atmel Corporation
6898e76c9SJagannadha Sutradharudu Teki * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
7898e76c9SJagannadha Sutradharudu Teki * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
8898e76c9SJagannadha Sutradharudu Teki */
9898e76c9SJagannadha Sutradharudu Teki
10898e76c9SJagannadha Sutradharudu Teki #include <common.h>
11fbb09918SSimon Glass #include <dm.h>
12ae242cbfSSimon Glass #include <errno.h>
13898e76c9SJagannadha Sutradharudu Teki #include <malloc.h>
14898e76c9SJagannadha Sutradharudu Teki #include <spi.h>
15898e76c9SJagannadha Sutradharudu Teki #include <spi_flash.h>
16898e76c9SJagannadha Sutradharudu Teki
17898e76c9SJagannadha Sutradharudu Teki #include "sf_internal.h"
18898e76c9SJagannadha Sutradharudu Teki
19ae242cbfSSimon Glass /**
20ae242cbfSSimon Glass * spi_flash_probe_slave() - Probe for a SPI flash device on a bus
21ae242cbfSSimon Glass *
22ae242cbfSSimon Glass * @flashp: Pointer to place to put flash info, which may be NULL if the
23ae242cbfSSimon Glass * space should be allocated
24ae242cbfSSimon Glass */
spi_flash_probe_slave(struct spi_flash * flash)25339fd6dcSJagan Teki static int spi_flash_probe_slave(struct spi_flash *flash)
26898e76c9SJagannadha Sutradharudu Teki {
27bfdb07ebSJagan Teki struct spi_slave *spi = flash->spi;
28898e76c9SJagannadha Sutradharudu Teki int ret;
29898e76c9SJagannadha Sutradharudu Teki
30898e76c9SJagannadha Sutradharudu Teki /* Setup spi_slave */
31898e76c9SJagannadha Sutradharudu Teki if (!spi) {
32898e76c9SJagannadha Sutradharudu Teki printf("SF: Failed to set up slave\n");
33ae242cbfSSimon Glass return -ENODEV;
34898e76c9SJagannadha Sutradharudu Teki }
35898e76c9SJagannadha Sutradharudu Teki
36898e76c9SJagannadha Sutradharudu Teki /* Claim spi bus */
37898e76c9SJagannadha Sutradharudu Teki ret = spi_claim_bus(spi);
38898e76c9SJagannadha Sutradharudu Teki if (ret) {
39898e76c9SJagannadha Sutradharudu Teki debug("SF: Failed to claim SPI bus: %d\n", ret);
40ae242cbfSSimon Glass return ret;
41898e76c9SJagannadha Sutradharudu Teki }
42898e76c9SJagannadha Sutradharudu Teki
43c4e88623SVignesh R ret = spi_nor_scan(flash);
440badb23dSSimon Glass if (ret)
45898e76c9SJagannadha Sutradharudu Teki goto err_read_id;
46898e76c9SJagannadha Sutradharudu Teki
479fe6d871SDaniel Schwierzeck #ifdef CONFIG_SPI_FLASH_MTD
489fe6d871SDaniel Schwierzeck ret = spi_flash_mtd_register(flash);
499fe6d871SDaniel Schwierzeck #endif
50898e76c9SJagannadha Sutradharudu Teki
51898e76c9SJagannadha Sutradharudu Teki err_read_id:
52898e76c9SJagannadha Sutradharudu Teki spi_release_bus(spi);
53ae242cbfSSimon Glass return ret;
54ae242cbfSSimon Glass }
55ae242cbfSSimon Glass
56fbb09918SSimon Glass #ifndef CONFIG_DM_SPI_FLASH
spi_flash_probe(unsigned int busnum,unsigned int cs,unsigned int max_hz,unsigned int spi_mode)5736890ff0SMario Six struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs,
5836890ff0SMario Six unsigned int max_hz, unsigned int spi_mode)
59ae242cbfSSimon Glass {
6036890ff0SMario Six struct spi_slave *bus;
61ae242cbfSSimon Glass struct spi_flash *flash;
62ae242cbfSSimon Glass
6336890ff0SMario Six bus = spi_setup_slave(busnum, cs, max_hz, spi_mode);
6436890ff0SMario Six if (!bus)
6536890ff0SMario Six return NULL;
6636890ff0SMario Six
67ae242cbfSSimon Glass /* Allocate space if needed (not used by sf-uclass */
68ae242cbfSSimon Glass flash = calloc(1, sizeof(*flash));
69ae242cbfSSimon Glass if (!flash) {
70ae242cbfSSimon Glass debug("SF: Failed to allocate spi_flash\n");
71898e76c9SJagannadha Sutradharudu Teki return NULL;
72898e76c9SJagannadha Sutradharudu Teki }
73898e76c9SJagannadha Sutradharudu Teki
74bfdb07ebSJagan Teki flash->spi = bus;
75bfdb07ebSJagan Teki if (spi_flash_probe_slave(flash)) {
76ae242cbfSSimon Glass spi_free_slave(bus);
77ae242cbfSSimon Glass free(flash);
78ae242cbfSSimon Glass return NULL;
79ae242cbfSSimon Glass }
80ae242cbfSSimon Glass
81ae242cbfSSimon Glass return flash;
82ae242cbfSSimon Glass }
83ae242cbfSSimon Glass
spi_flash_free(struct spi_flash * flash)84898e76c9SJagannadha Sutradharudu Teki void spi_flash_free(struct spi_flash *flash)
85898e76c9SJagannadha Sutradharudu Teki {
869fe6d871SDaniel Schwierzeck #ifdef CONFIG_SPI_FLASH_MTD
879fe6d871SDaniel Schwierzeck spi_flash_mtd_unregister();
889fe6d871SDaniel Schwierzeck #endif
89898e76c9SJagannadha Sutradharudu Teki spi_free_slave(flash->spi);
90898e76c9SJagannadha Sutradharudu Teki free(flash);
91898e76c9SJagannadha Sutradharudu Teki }
92fbb09918SSimon Glass
93fbb09918SSimon Glass #else /* defined CONFIG_DM_SPI_FLASH */
94fbb09918SSimon Glass
spi_flash_std_read(struct udevice * dev,u32 offset,size_t len,void * buf)95fbb09918SSimon Glass static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len,
96fbb09918SSimon Glass void *buf)
97fbb09918SSimon Glass {
98e564f054SSimon Glass struct spi_flash *flash = dev_get_uclass_priv(dev);
99c4e88623SVignesh R struct mtd_info *mtd = &flash->mtd;
100c4e88623SVignesh R size_t retlen;
101fbb09918SSimon Glass
102c4e88623SVignesh R return log_ret(mtd->_read(mtd, offset, len, &retlen, buf));
103fbb09918SSimon Glass }
104fbb09918SSimon Glass
spi_flash_std_write(struct udevice * dev,u32 offset,size_t len,const void * buf)105339fd6dcSJagan Teki static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len,
106fbb09918SSimon Glass const void *buf)
107fbb09918SSimon Glass {
108e564f054SSimon Glass struct spi_flash *flash = dev_get_uclass_priv(dev);
109c4e88623SVignesh R struct mtd_info *mtd = &flash->mtd;
110c4e88623SVignesh R size_t retlen;
111fbb09918SSimon Glass
112c4e88623SVignesh R return mtd->_write(mtd, offset, len, &retlen, buf);
113fbb09918SSimon Glass }
114fbb09918SSimon Glass
spi_flash_std_erase(struct udevice * dev,u32 offset,size_t len)115339fd6dcSJagan Teki static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len)
116fbb09918SSimon Glass {
117e564f054SSimon Glass struct spi_flash *flash = dev_get_uclass_priv(dev);
118c4e88623SVignesh R struct mtd_info *mtd = &flash->mtd;
119c4e88623SVignesh R struct erase_info instr;
120fbb09918SSimon Glass
121c4e88623SVignesh R if (offset % mtd->erasesize || len % mtd->erasesize) {
122c4e88623SVignesh R printf("SF: Erase offset/length not multiple of erase size\n");
123c4e88623SVignesh R return -EINVAL;
124c4e88623SVignesh R }
125c4e88623SVignesh R
126c4e88623SVignesh R memset(&instr, 0, sizeof(instr));
127c4e88623SVignesh R instr.addr = offset;
128c4e88623SVignesh R instr.len = len;
129c4e88623SVignesh R
130c4e88623SVignesh R return mtd->_erase(mtd, &instr);
131fbb09918SSimon Glass }
132fbb09918SSimon Glass
spi_flash_std_get_sw_write_prot(struct udevice * dev)133a58986caSSimon Glass static int spi_flash_std_get_sw_write_prot(struct udevice *dev)
134a58986caSSimon Glass {
135a58986caSSimon Glass struct spi_flash *flash = dev_get_uclass_priv(dev);
136a58986caSSimon Glass
137a58986caSSimon Glass return spi_flash_cmd_get_sw_write_prot(flash);
138a58986caSSimon Glass }
139a58986caSSimon Glass
spi_flash_std_ctrl_wlock(struct udevice * dev,u32 offset,size_t len)140*591e1cf0SChin-Ting Kuo static int spi_flash_std_ctrl_wlock(struct udevice *dev, u32 offset, size_t len)
141*591e1cf0SChin-Ting Kuo {
142*591e1cf0SChin-Ting Kuo struct spi_flash *flash = dev_get_uclass_priv(dev);
143*591e1cf0SChin-Ting Kuo
144*591e1cf0SChin-Ting Kuo return spi_flash_wlock_by_host_ctrl(flash, offset, len);
145*591e1cf0SChin-Ting Kuo }
146*591e1cf0SChin-Ting Kuo
spi_flash_std_ctrl_wunlock(struct udevice * dev,u32 offset,size_t len)147*591e1cf0SChin-Ting Kuo static int spi_flash_std_ctrl_wunlock(struct udevice *dev, u32 offset, size_t len)
148*591e1cf0SChin-Ting Kuo {
149*591e1cf0SChin-Ting Kuo struct spi_flash *flash = dev_get_uclass_priv(dev);
150*591e1cf0SChin-Ting Kuo
151*591e1cf0SChin-Ting Kuo return spi_flash_wunlock_by_host_ctrl(flash, offset, len);
152*591e1cf0SChin-Ting Kuo }
153*591e1cf0SChin-Ting Kuo
spi_flash_std_probe(struct udevice * dev)154339fd6dcSJagan Teki static int spi_flash_std_probe(struct udevice *dev)
155fbb09918SSimon Glass {
156bcbe3d15SSimon Glass struct spi_slave *slave = dev_get_parent_priv(dev);
157d0cff03eSSimon Glass struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
158fbb09918SSimon Glass struct spi_flash *flash;
159fbb09918SSimon Glass
160e564f054SSimon Glass flash = dev_get_uclass_priv(dev);
161fbb09918SSimon Glass flash->dev = dev;
162bfdb07ebSJagan Teki flash->spi = slave;
163d0cff03eSSimon Glass debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs);
164bfdb07ebSJagan Teki return spi_flash_probe_slave(flash);
165fbb09918SSimon Glass }
166fbb09918SSimon Glass
spi_flash_std_remove(struct udevice * dev)1677371944aSBoris Brezillon static int spi_flash_std_remove(struct udevice *dev)
1687371944aSBoris Brezillon {
1697371944aSBoris Brezillon #ifdef CONFIG_SPI_FLASH_MTD
1707371944aSBoris Brezillon spi_flash_mtd_unregister();
1717371944aSBoris Brezillon #endif
1727371944aSBoris Brezillon return 0;
1737371944aSBoris Brezillon }
1747371944aSBoris Brezillon
175fbb09918SSimon Glass static const struct dm_spi_flash_ops spi_flash_std_ops = {
176fbb09918SSimon Glass .read = spi_flash_std_read,
177fbb09918SSimon Glass .write = spi_flash_std_write,
178fbb09918SSimon Glass .erase = spi_flash_std_erase,
179a58986caSSimon Glass .get_sw_write_prot = spi_flash_std_get_sw_write_prot,
180*591e1cf0SChin-Ting Kuo .flash_ctrl_wlock = spi_flash_std_ctrl_wlock,
181*591e1cf0SChin-Ting Kuo .flash_ctrl_wunlock = spi_flash_std_ctrl_wunlock,
182fbb09918SSimon Glass };
183fbb09918SSimon Glass
184fbb09918SSimon Glass static const struct udevice_id spi_flash_std_ids[] = {
185fbb09918SSimon Glass { .compatible = "spi-flash" },
1862ee6705bSVignesh R { .compatible = "jedec,spi-nor" },
187fbb09918SSimon Glass { }
188fbb09918SSimon Glass };
189fbb09918SSimon Glass
190fbb09918SSimon Glass U_BOOT_DRIVER(spi_flash_std) = {
191fbb09918SSimon Glass .name = "spi_flash_std",
192fbb09918SSimon Glass .id = UCLASS_SPI_FLASH,
193fbb09918SSimon Glass .of_match = spi_flash_std_ids,
194fbb09918SSimon Glass .probe = spi_flash_std_probe,
1957371944aSBoris Brezillon .remove = spi_flash_std_remove,
196fbb09918SSimon Glass .priv_auto_alloc_size = sizeof(struct spi_flash),
197fbb09918SSimon Glass .ops = &spi_flash_std_ops,
198fbb09918SSimon Glass };
199fbb09918SSimon Glass
200fbb09918SSimon Glass #endif /* CONFIG_DM_SPI_FLASH */
201