Jagannadha Sutradharudu Teki | 4d5e29a | 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 | 0c88a84 | 2013-10-10 22:32:55 +0530 | [diff] [blame] | 8 | * SPDX-License-Identifier: GPL-2.0+ |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | #include <common.h> |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 12 | #include <dm.h> |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 13 | #include <errno.h> |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 14 | #include <fdtdec.h> |
| 15 | #include <malloc.h> |
Joe Hershberger | 0eb25b6 | 2015-03-22 17:08:59 -0500 | [diff] [blame] | 16 | #include <mapmem.h> |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 17 | #include <spi.h> |
| 18 | #include <spi_flash.h> |
Mike Frysinger | ffdb20b | 2013-12-03 16:43:27 -0700 | [diff] [blame] | 19 | #include <asm/io.h> |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 20 | |
Jagannadha Sutradharudu Teki | 898e76c | 2013-09-26 16:00:15 +0530 | [diff] [blame] | 21 | #include "sf_internal.h" |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 22 | |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 23 | /** |
| 24 | * spi_flash_probe_slave() - Probe for a SPI flash device on a bus |
| 25 | * |
| 26 | * @spi: Bus to probe |
| 27 | * @flashp: Pointer to place to put flash info, which may be NULL if the |
| 28 | * space should be allocated |
| 29 | */ |
| 30 | int spi_flash_probe_slave(struct spi_slave *spi, struct spi_flash *flash) |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 31 | { |
Jagannadha Sutradharudu Teki | 4d4ec99 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 32 | int ret; |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 33 | |
Jagannadha Sutradharudu Teki | 4d4ec99 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 34 | /* Setup spi_slave */ |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 35 | if (!spi) { |
| 36 | printf("SF: Failed to set up slave\n"); |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 37 | return -ENODEV; |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 38 | } |
| 39 | |
Jagannadha Sutradharudu Teki | 4d4ec99 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 40 | /* Claim spi bus */ |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 41 | ret = spi_claim_bus(spi); |
| 42 | if (ret) { |
| 43 | debug("SF: Failed to claim SPI bus: %d\n", ret); |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 44 | return ret; |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 45 | } |
| 46 | |
Jagan Teki | 1e90d9f | 2015-09-29 18:06:04 +0530 | [diff] [blame] | 47 | ret = spi_flash_scan(spi, flash); |
Jagan Teki | 3a1adb6 | 2015-09-29 17:28:20 +0530 | [diff] [blame] | 48 | if (ret) { |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 49 | ret = -EINVAL; |
Jagannadha Sutradharudu Teki | 4d4ec99 | 2013-09-24 16:01:23 +0530 | [diff] [blame] | 50 | goto err_read_id; |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 51 | } |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 52 | |
Daniel Schwierzeck | 9fe6d87 | 2015-04-27 07:42:04 +0200 | [diff] [blame] | 53 | #ifdef CONFIG_SPI_FLASH_MTD |
| 54 | ret = spi_flash_mtd_register(flash); |
| 55 | #endif |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 56 | |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 57 | err_read_id: |
| 58 | spi_release_bus(spi); |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 59 | return ret; |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 60 | } |
| 61 | |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 62 | #ifndef CONFIG_DM_SPI_FLASH |
| 63 | struct spi_flash *spi_flash_probe_tail(struct spi_slave *bus) |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 64 | { |
| 65 | struct spi_flash *flash; |
| 66 | |
| 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 | |
| 74 | if (spi_flash_probe_slave(bus, flash)) { |
| 75 | spi_free_slave(bus); |
| 76 | free(flash); |
| 77 | return NULL; |
| 78 | } |
| 79 | |
| 80 | return flash; |
| 81 | } |
| 82 | |
| 83 | struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs, |
Simon Glass | 0efc024 | 2013-12-03 16:43:24 -0700 | [diff] [blame] | 84 | unsigned int max_hz, unsigned int spi_mode) |
| 85 | { |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 86 | struct spi_slave *bus; |
Simon Glass | 0efc024 | 2013-12-03 16:43:24 -0700 | [diff] [blame] | 87 | |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 88 | bus = spi_setup_slave(busnum, cs, max_hz, spi_mode); |
Peng Fan | 4fbad92 | 2015-03-20 13:19:16 +0800 | [diff] [blame] | 89 | if (!bus) |
| 90 | return NULL; |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 91 | return spi_flash_probe_tail(bus); |
Simon Glass | 0efc024 | 2013-12-03 16:43:24 -0700 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | #ifdef CONFIG_OF_SPI_FLASH |
| 95 | struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node, |
| 96 | int spi_node) |
| 97 | { |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 98 | struct spi_slave *bus; |
Simon Glass | 0efc024 | 2013-12-03 16:43:24 -0700 | [diff] [blame] | 99 | |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 100 | bus = spi_setup_slave_fdt(blob, slave_node, spi_node); |
Peng Fan | 4fbad92 | 2015-03-20 13:19:16 +0800 | [diff] [blame] | 101 | if (!bus) |
| 102 | return NULL; |
Simon Glass | ae242cb | 2014-10-13 23:42:05 -0600 | [diff] [blame] | 103 | return spi_flash_probe_tail(bus); |
Simon Glass | 0efc024 | 2013-12-03 16:43:24 -0700 | [diff] [blame] | 104 | } |
| 105 | #endif |
| 106 | |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 107 | void spi_flash_free(struct spi_flash *flash) |
| 108 | { |
Daniel Schwierzeck | 9fe6d87 | 2015-04-27 07:42:04 +0200 | [diff] [blame] | 109 | #ifdef CONFIG_SPI_FLASH_MTD |
| 110 | spi_flash_mtd_unregister(); |
| 111 | #endif |
Jagannadha Sutradharudu Teki | 4d5e29a | 2013-08-29 19:01:56 +0530 | [diff] [blame] | 112 | spi_free_slave(flash->spi); |
| 113 | free(flash); |
| 114 | } |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 115 | |
| 116 | #else /* defined CONFIG_DM_SPI_FLASH */ |
| 117 | |
| 118 | static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len, |
| 119 | void *buf) |
| 120 | { |
Simon Glass | e564f05 | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 121 | struct spi_flash *flash = dev_get_uclass_priv(dev); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 122 | |
| 123 | return spi_flash_cmd_read_ops(flash, offset, len, buf); |
| 124 | } |
| 125 | |
| 126 | int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len, |
| 127 | const void *buf) |
| 128 | { |
Simon Glass | e564f05 | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 129 | struct spi_flash *flash = dev_get_uclass_priv(dev); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 130 | |
Bin Meng | 074eed5 | 2015-04-24 19:51:10 +0800 | [diff] [blame] | 131 | #if defined(CONFIG_SPI_FLASH_SST) |
Jagan Teki | 1fabefd | 2015-09-29 11:17:02 +0530 | [diff] [blame] | 132 | if (flash->flags & SNOR_F_SST_WR) { |
Bin Meng | 074eed5 | 2015-04-24 19:51:10 +0800 | [diff] [blame] | 133 | if (flash->spi->op_mode_tx & SPI_OPM_TX_BP) |
| 134 | return sst_write_bp(flash, offset, len, buf); |
| 135 | else |
| 136 | return sst_write_wp(flash, offset, len, buf); |
| 137 | } |
| 138 | #endif |
| 139 | |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 140 | return spi_flash_cmd_write_ops(flash, offset, len, buf); |
| 141 | } |
| 142 | |
| 143 | int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len) |
| 144 | { |
Simon Glass | e564f05 | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 145 | struct spi_flash *flash = dev_get_uclass_priv(dev); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 146 | |
| 147 | return spi_flash_cmd_erase_ops(flash, offset, len); |
| 148 | } |
| 149 | |
| 150 | int spi_flash_std_probe(struct udevice *dev) |
| 151 | { |
Simon Glass | bcbe3d1 | 2015-09-28 23:32:01 -0600 | [diff] [blame] | 152 | struct spi_slave *slave = dev_get_parent_priv(dev); |
Simon Glass | d0cff03 | 2015-01-25 08:27:12 -0700 | [diff] [blame] | 153 | struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 154 | struct spi_flash *flash; |
| 155 | |
Simon Glass | e564f05 | 2015-03-05 12:25:20 -0700 | [diff] [blame] | 156 | flash = dev_get_uclass_priv(dev); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 157 | flash->dev = dev; |
Simon Glass | d0cff03 | 2015-01-25 08:27:12 -0700 | [diff] [blame] | 158 | debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs); |
Simon Glass | fbb0991 | 2014-10-13 23:42:07 -0600 | [diff] [blame] | 159 | return spi_flash_probe_slave(slave, flash); |
| 160 | } |
| 161 | |
| 162 | static const struct dm_spi_flash_ops spi_flash_std_ops = { |
| 163 | .read = spi_flash_std_read, |
| 164 | .write = spi_flash_std_write, |
| 165 | .erase = spi_flash_std_erase, |
| 166 | }; |
| 167 | |
| 168 | static const struct udevice_id spi_flash_std_ids[] = { |
| 169 | { .compatible = "spi-flash" }, |
| 170 | { } |
| 171 | }; |
| 172 | |
| 173 | U_BOOT_DRIVER(spi_flash_std) = { |
| 174 | .name = "spi_flash_std", |
| 175 | .id = UCLASS_SPI_FLASH, |
| 176 | .of_match = spi_flash_std_ids, |
| 177 | .probe = spi_flash_std_probe, |
| 178 | .priv_auto_alloc_size = sizeof(struct spi_flash), |
| 179 | .ops = &spi_flash_std_ops, |
| 180 | }; |
| 181 | |
| 182 | #endif /* CONFIG_DM_SPI_FLASH */ |