Tom Rini | 83d290c | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 2 | /* |
| 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 Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <common.h> |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 11 | #include <dm.h> |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 12 | #include <errno.h> |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 13 | #include <malloc.h> |
| 14 | #include <spi.h> |
| 15 | #include <spi_flash.h> |
| 16 | |
Jagannadha Sutradharudu Teki | 898e76c | 2013-09-26 16:00:15 +0530 | [diff] [blame] | 17 | #include "sf_internal.h" |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 18 | |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 19 | /** |
| 20 | * spi_flash_probe_slave() - Probe for a SPI flash device on a bus |
| 21 | * |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 22 | * @flashp: Pointer to place to put flash info, which may be NULL if the |
| 23 | * space should be allocated |
| 24 | */ |
Jagan Teki | 339fd6d | 2015-12-06 21:44:12 +0530 | [diff] [blame] | 25 | static int spi_flash_probe_slave(struct spi_flash *flash) |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 26 | { |
Jagan Teki | bfdb07e | 2015-12-06 21:33:32 +0530 | [diff] [blame] | 27 | struct spi_slave *spi = flash->spi; |
Jagannadha Sutradharudu Teki | 4d4ec99 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 28 | int ret; |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 29 | |
Jagannadha Sutradharudu Teki | 4d4ec99 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 30 | /* Setup spi_slave */ |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 31 | if (!spi) { |
| 32 | printf("SF: Failed to set up slave\n"); |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 33 | return -ENODEV; |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 34 | } |
| 35 | |
Jagannadha Sutradharudu Teki | 4d4ec99 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 36 | /* Claim spi bus */ |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 37 | ret = spi_claim_bus(spi); |
| 38 | if (ret) { |
| 39 | debug("SF: Failed to claim SPI bus: %d\n", ret); |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 40 | return ret; |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 41 | } |
| 42 | |
Jagan Teki | bfdb07e | 2015-12-06 21:33:32 +0530 | [diff] [blame] | 43 | ret = spi_flash_scan(flash); |
Simon Glass | 0badb23d | 2016-02-24 09:14:56 -0700 | [diff] [blame] | 44 | if (ret) |
Jagannadha Sutradharudu Teki | 4d4ec99 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 45 | goto err_read_id; |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 46 | |
Daniel Schwierzeck | 9fe6d87 | 2015-04-27 07:42:04 +0200 | [diff] [blame] | 47 | #ifdef CONFIG_SPI_FLASH_MTD |
| 48 | ret = spi_flash_mtd_register(flash); |
| 49 | #endif |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 50 | |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 51 | err_read_id: |
| 52 | spi_release_bus(spi); |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 53 | return ret; |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 54 | } |
| 55 | |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 56 | #ifndef CONFIG_DM_SPI_FLASH |
Mario Six | 36890ff | 2018-01-15 11:08:42 +0100 | [diff] [blame] | 57 | struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs, |
| 58 | unsigned int max_hz, unsigned int spi_mode) |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 59 | { |
Mario Six | 36890ff | 2018-01-15 11:08:42 +0100 | [diff] [blame] | 60 | struct spi_slave *bus; |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 61 | struct spi_flash *flash; |
| 62 | |
Mario Six | 36890ff | 2018-01-15 11:08:42 +0100 | [diff] [blame] | 63 | bus = spi_setup_slave(busnum, cs, max_hz, spi_mode); |
| 64 | if (!bus) |
| 65 | return NULL; |
| 66 | |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 67 | /* 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 Teki | bfdb07e | 2015-12-06 21:33:32 +0530 | [diff] [blame] | 74 | flash->spi = bus; |
| 75 | if (spi_flash_probe_slave(flash)) { |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 76 | spi_free_slave(bus); |
| 77 | free(flash); |
| 78 | return NULL; |
| 79 | } |
| 80 | |
| 81 | return flash; |
| 82 | } |
| 83 | |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 84 | void spi_flash_free(struct spi_flash *flash) |
| 85 | { |
Daniel Schwierzeck | 9fe6d87 | 2015-04-27 07:42:04 +0200 | [diff] [blame] | 86 | #ifdef CONFIG_SPI_FLASH_MTD |
| 87 | spi_flash_mtd_unregister(); |
| 88 | #endif |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 89 | spi_free_slave(flash->spi); |
| 90 | free(flash); |
| 91 | } |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 92 | |
| 93 | #else /* defined CONFIG_DM_SPI_FLASH */ |
| 94 | |
| 95 | static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len, |
| 96 | void *buf) |
| 97 | { |
Simon Glass | e564f05 | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 98 | struct spi_flash *flash = dev_get_uclass_priv(dev); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 99 | |
Simon Glass | 5e24a2e | 2018-10-01 12:22:24 -0600 | [diff] [blame] | 100 | return log_ret(spi_flash_cmd_read_ops(flash, offset, len, buf)); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 101 | } |
| 102 | |
Jagan Teki | 339fd6d | 2015-12-06 21:44:12 +0530 | [diff] [blame] | 103 | static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len, |
Mario Six | a3e32c5 | 2018-01-15 11:08:40 +0100 | [diff] [blame] | 104 | const void *buf) |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 105 | { |
Simon Glass | e564f05 | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 106 | struct spi_flash *flash = dev_get_uclass_priv(dev); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 107 | |
Bin Meng | 074eed5 | 2015-04-24 19:51:10 +0800 | [diff] [blame] | 108 | #if defined(CONFIG_SPI_FLASH_SST) |
Jagan Teki | 1fabefd | 2015-09-29 11:17:02 +0530 | [diff] [blame] | 109 | if (flash->flags & SNOR_F_SST_WR) { |
Jagan Teki | cdf3393 | 2015-12-13 20:12:45 +0530 | [diff] [blame] | 110 | if (flash->spi->mode & SPI_TX_BYTE) |
Bin Meng | 074eed5 | 2015-04-24 19:51:10 +0800 | [diff] [blame] | 111 | return sst_write_bp(flash, offset, len, buf); |
| 112 | else |
| 113 | return sst_write_wp(flash, offset, len, buf); |
| 114 | } |
| 115 | #endif |
| 116 | |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 117 | return spi_flash_cmd_write_ops(flash, offset, len, buf); |
| 118 | } |
| 119 | |
Jagan Teki | 339fd6d | 2015-12-06 21:44:12 +0530 | [diff] [blame] | 120 | static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len) |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 121 | { |
Simon Glass | e564f05 | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 122 | struct spi_flash *flash = dev_get_uclass_priv(dev); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 123 | |
| 124 | return spi_flash_cmd_erase_ops(flash, offset, len); |
| 125 | } |
| 126 | |
Jagan Teki | 339fd6d | 2015-12-06 21:44:12 +0530 | [diff] [blame] | 127 | static int spi_flash_std_probe(struct udevice *dev) |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 128 | { |
Simon Glass | bcbe3d1 | 2015-09-28 23:32:01 -0600 | [diff] [blame] | 129 | struct spi_slave *slave = dev_get_parent_priv(dev); |
Simon Glass | d0cff03 | 2015-01-25 08:27:12 -0700 | [diff] [blame] | 130 | struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 131 | struct spi_flash *flash; |
| 132 | |
Simon Glass | e564f05 | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 133 | flash = dev_get_uclass_priv(dev); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 134 | flash->dev = dev; |
Jagan Teki | bfdb07e | 2015-12-06 21:33:32 +0530 | [diff] [blame] | 135 | flash->spi = slave; |
Simon Glass | d0cff03 | 2015-01-25 08:27:12 -0700 | [diff] [blame] | 136 | debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs); |
Jagan Teki | bfdb07e | 2015-12-06 21:33:32 +0530 | [diff] [blame] | 137 | return spi_flash_probe_slave(flash); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | static 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 | |
| 146 | static const struct udevice_id spi_flash_std_ids[] = { |
| 147 | { .compatible = "spi-flash" }, |
| 148 | { } |
| 149 | }; |
| 150 | |
| 151 | U_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 */ |