Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 1 | /* |
| 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 Teki | d145270 | 2013-10-10 22:32:55 +0530 | [diff] [blame] | 8 | * SPDX-License-Identifier: GPL-2.0+ |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | #include <common.h> |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 12 | #include <dm.h> |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 13 | #include <errno.h> |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 14 | #include <malloc.h> |
| 15 | #include <spi.h> |
| 16 | #include <spi_flash.h> |
| 17 | |
Jagannadha Sutradharudu Teki | ac8242d | 2013-09-26 16:00:15 +0530 | [diff] [blame] | 18 | #include "sf_internal.h" |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 19 | |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 20 | /** |
| 21 | * spi_flash_probe_slave() - Probe for a SPI flash device on a bus |
| 22 | * |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 23 | * @flashp: Pointer to place to put flash info, which may be NULL if the |
| 24 | * space should be allocated |
| 25 | */ |
Jagan Teki | c772eaa | 2015-12-06 21:44:12 +0530 | [diff] [blame] | 26 | static int spi_flash_probe_slave(struct spi_flash *flash) |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 27 | { |
Jagan Teki | 4abfb98 | 2015-12-06 21:33:32 +0530 | [diff] [blame] | 28 | struct spi_slave *spi = flash->spi; |
Jagannadha Sutradharudu Teki | bb30220 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 29 | int ret; |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 30 | |
Jagannadha Sutradharudu Teki | bb30220 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 31 | /* Setup spi_slave */ |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 32 | if (!spi) { |
| 33 | printf("SF: Failed to set up slave\n"); |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 34 | return -ENODEV; |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 35 | } |
| 36 | |
Jagannadha Sutradharudu Teki | bb30220 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 37 | /* Claim spi bus */ |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 38 | ret = spi_claim_bus(spi); |
| 39 | if (ret) { |
| 40 | debug("SF: Failed to claim SPI bus: %d\n", ret); |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 41 | return ret; |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 42 | } |
| 43 | |
Jagan Teki | 4abfb98 | 2015-12-06 21:33:32 +0530 | [diff] [blame] | 44 | ret = spi_flash_scan(flash); |
Simon Glass | 07f6671 | 2016-02-24 09:14:56 -0700 | [diff] [blame] | 45 | if (ret) |
Jagannadha Sutradharudu Teki | bb30220 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 46 | goto err_read_id; |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 47 | |
Daniel Schwierzeck | 06cfc03 | 2015-04-27 07:42:04 +0200 | [diff] [blame] | 48 | #ifdef CONFIG_SPI_FLASH_MTD |
| 49 | ret = spi_flash_mtd_register(flash); |
| 50 | #endif |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 51 | |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 52 | err_read_id: |
| 53 | spi_release_bus(spi); |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 54 | return ret; |
| 55 | } |
| 56 | |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 57 | #ifndef CONFIG_DM_SPI_FLASH |
Jagan Teki | c772eaa | 2015-12-06 21:44:12 +0530 | [diff] [blame] | 58 | static struct spi_flash *spi_flash_probe_tail(struct spi_slave *bus) |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 59 | { |
| 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 Teki | 4abfb98 | 2015-12-06 21:33:32 +0530 | [diff] [blame] | 69 | flash->spi = bus; |
| 70 | if (spi_flash_probe_slave(flash)) { |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 71 | spi_free_slave(bus); |
| 72 | free(flash); |
| 73 | return NULL; |
| 74 | } |
| 75 | |
| 76 | return flash; |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 77 | } |
| 78 | |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 79 | struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs, |
Simon Glass | 49e9d2c | 2013-12-03 16:43:24 -0700 | [diff] [blame] | 80 | unsigned int max_hz, unsigned int spi_mode) |
| 81 | { |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 82 | struct spi_slave *bus; |
Simon Glass | 49e9d2c | 2013-12-03 16:43:24 -0700 | [diff] [blame] | 83 | |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 84 | bus = spi_setup_slave(busnum, cs, max_hz, spi_mode); |
Peng Fan | 54473a4 | 2015-03-20 13:19:16 +0800 | [diff] [blame] | 85 | if (!bus) |
| 86 | return NULL; |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 87 | return spi_flash_probe_tail(bus); |
Simon Glass | 49e9d2c | 2013-12-03 16:43:24 -0700 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | #ifdef CONFIG_OF_SPI_FLASH |
| 91 | struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node, |
| 92 | int spi_node) |
| 93 | { |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 94 | struct spi_slave *bus; |
Simon Glass | 49e9d2c | 2013-12-03 16:43:24 -0700 | [diff] [blame] | 95 | |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 96 | bus = spi_setup_slave_fdt(blob, slave_node, spi_node); |
Peng Fan | 54473a4 | 2015-03-20 13:19:16 +0800 | [diff] [blame] | 97 | if (!bus) |
| 98 | return NULL; |
Simon Glass | c10c3d4 | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 99 | return spi_flash_probe_tail(bus); |
Simon Glass | 49e9d2c | 2013-12-03 16:43:24 -0700 | [diff] [blame] | 100 | } |
| 101 | #endif |
| 102 | |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 103 | void spi_flash_free(struct spi_flash *flash) |
| 104 | { |
Daniel Schwierzeck | 06cfc03 | 2015-04-27 07:42:04 +0200 | [diff] [blame] | 105 | #ifdef CONFIG_SPI_FLASH_MTD |
| 106 | spi_flash_mtd_unregister(); |
| 107 | #endif |
Jagannadha Sutradharudu Teki | e9a8b82 | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 108 | spi_free_slave(flash->spi); |
| 109 | free(flash); |
| 110 | } |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 111 | |
| 112 | #else /* defined CONFIG_DM_SPI_FLASH */ |
| 113 | |
| 114 | static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len, |
| 115 | void *buf) |
| 116 | { |
Simon Glass | de0977b | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 117 | struct spi_flash *flash = dev_get_uclass_priv(dev); |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 118 | |
| 119 | return spi_flash_cmd_read_ops(flash, offset, len, buf); |
| 120 | } |
| 121 | |
Jagan Teki | c772eaa | 2015-12-06 21:44:12 +0530 | [diff] [blame] | 122 | static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len, |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 123 | const void *buf) |
| 124 | { |
Simon Glass | de0977b | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 125 | struct spi_flash *flash = dev_get_uclass_priv(dev); |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 126 | |
Bin Meng | fe0d080 | 2015-04-24 19:51:10 +0800 | [diff] [blame] | 127 | #if defined(CONFIG_SPI_FLASH_SST) |
Jagan Teki | 4537cec | 2015-09-29 11:17:02 +0530 | [diff] [blame] | 128 | if (flash->flags & SNOR_F_SST_WR) { |
Jagan Teki | 71331b3 | 2015-12-13 20:12:45 +0530 | [diff] [blame] | 129 | if (flash->spi->mode & SPI_TX_BYTE) |
Bin Meng | fe0d080 | 2015-04-24 19:51:10 +0800 | [diff] [blame] | 130 | return sst_write_bp(flash, offset, len, buf); |
| 131 | else |
| 132 | return sst_write_wp(flash, offset, len, buf); |
| 133 | } |
| 134 | #endif |
| 135 | |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 136 | return spi_flash_cmd_write_ops(flash, offset, len, buf); |
| 137 | } |
| 138 | |
Jagan Teki | c772eaa | 2015-12-06 21:44:12 +0530 | [diff] [blame] | 139 | static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len) |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 140 | { |
Simon Glass | de0977b | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 141 | struct spi_flash *flash = dev_get_uclass_priv(dev); |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 142 | |
| 143 | return spi_flash_cmd_erase_ops(flash, offset, len); |
| 144 | } |
| 145 | |
Jagan Teki | c772eaa | 2015-12-06 21:44:12 +0530 | [diff] [blame] | 146 | static int spi_flash_std_probe(struct udevice *dev) |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 147 | { |
Simon Glass | de44acf | 2015-09-28 23:32:01 -0600 | [diff] [blame] | 148 | struct spi_slave *slave = dev_get_parent_priv(dev); |
Simon Glass | 5d2ee05 | 2015-01-25 08:27:12 -0700 | [diff] [blame] | 149 | struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev); |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 150 | struct spi_flash *flash; |
| 151 | |
Simon Glass | de0977b | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 152 | flash = dev_get_uclass_priv(dev); |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 153 | flash->dev = dev; |
Jagan Teki | 4abfb98 | 2015-12-06 21:33:32 +0530 | [diff] [blame] | 154 | flash->spi = slave; |
Simon Glass | 5d2ee05 | 2015-01-25 08:27:12 -0700 | [diff] [blame] | 155 | debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs); |
Jagan Teki | 4abfb98 | 2015-12-06 21:33:32 +0530 | [diff] [blame] | 156 | return spi_flash_probe_slave(flash); |
Simon Glass | 6f7d259 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 157 | } |
| 158 | |
| 159 | static 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 | |
| 165 | static const struct udevice_id spi_flash_std_ids[] = { |
| 166 | { .compatible = "spi-flash" }, |
| 167 | { } |
| 168 | }; |
| 169 | |
| 170 | U_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 */ |