contrib/octeon-sdk/cvmx-flash.c

49  * This file provides bootbus flash operations
60 #include "cvmx-flash.h"
62 #define MAX_NUM_FLASH_CHIPS 8   /* Maximum number of flash chips */
77     void *              base_ptr;       /**< Memory pointer to start of flash */
93  * Read a byte from flash
107  * Read a byte from flash (for commands)
123  * Read 16bits from flash (for commands)
139  * Write a byte to flash
154  * Write a byte to flash (for commands)
169  * Query a address and see if a CFI flash chip is there.
178     cvmx_flash_t *flash = flash_info + chip_id;
181     flash->base_ptr = base_ptr;
182     flash->is_16bit = 1;   /* FIXME: Currently assumes the chip is 16bits */
184     /* Put flash in CFI query mode */
185     __cvmx_flash_write_cmd(chip_id, 0x00, 0xf0); /* Reset the flash chip */
193         flash->base_ptr = NULL;
198     flash->vendor = __cvmx_flash_read_cmd16(chip_id, 0x13);
202     flash->write_timeout = 1ull << (__cvmx_flash_read_cmd(chip_id, 0x1f) +
207     flash->erase_timeout = 1ull << (__cvmx_flash_read_cmd(chip_id, 0x21) +
210     /* Get the flash size. This is 2^0x27 */
211     flash->size = 1<<__cvmx_flash_read_cmd(chip_id, 0x27);
214     flash->num_regions = __cvmx_flash_read_cmd(chip_id, 0x2c);
218     for (region=0; region<flash->num_regions; region++)
220         cvmx_flash_region_t *rgn_ptr = flash->region + region;
252     flash->write_timeout *= cvmx_clock_get_rate(CVMX_CLOCK_CORE) / 1000000;
253     flash->erase_timeout *= cvmx_clock_get_rate(CVMX_CLOCK_CORE) / 1000;
257     cvmx_dprintf("cvmx-flash: Base pointer:  %p\n"
263            flash->base_ptr,
264            (unsigned int)flash->vendor,
265            flash->size,
266            flash->num_regions,
267            (unsigned long long)flash->erase_timeout,
268            (unsigned long long)flash->write_timeout);
270     for (region=0; region<flash->num_regions; region++)
274                flash->region[region].start_offset,
275                flash->region[region].num_blocks,
276                flash->region[region].block_size);
285  * Initialize the flash access library
300             bootloader already setup the flash */
308                 /* Valid CFI flash chip found */
315         cvmx_dprintf("cvmx-flash: No CFI chips found\n");
320  * Return a pointer to the flash chip
344  * Return information about a flash chips region
357  * Erase a block on the flash chip
368     cvmx_dprintf("cvmx-flash: Erasing chip %d, region %d, block %d\n",
380             __cvmx_flash_write_cmd(chip_id, 0x00, 0xf0); /* Reset the flash chip */
413                             cvmx_dprintf("cvmx-flash: Hardware timeout erasing block\n");
426                     cvmx_dprintf("cvmx-flash: Timeout erasing block\n");
432             __cvmx_flash_write_cmd(chip_id, 0x00, 0xf0); /* Reset the flash chip */
440             __cvmx_flash_write_cmd(chip_id, 0x00, 0xff); /* Reset the flash chip */
451                     cvmx_dprintf("cvmx-flash: Timeout erasing block\n");
461                 cvmx_dprintf("cvmx-flash: Hardware failure erasing block\n");
466             __cvmx_flash_write_cmd(chip_id, 0x00, 0xff); /* Reset the flash chip */
472     cvmx_dprintf("cvmx-flash: Unsupported flash vendor\n");
479  * Write a block on the flash chip
491     cvmx_dprintf("cvmx-flash: Writing chip %d, region %d, block %d\n",
507                 __cvmx_flash_write_cmd(chip_id, 0x00, 0xf0); /* Reset the flash chip */
528                             cvmx_dprintf("cvmx-flash: Hardware write timeout\n");
536                         cvmx_dprintf("cvmx-flash: Timeout writing block\n");
547             __cvmx_flash_write_cmd(chip_id, 0x00, 0xf0); /* Reset the flash chip */
559                 __cvmx_flash_write_cmd(chip_id, 0x00, 0xff); /* Reset the flash chip */
570                         cvmx_dprintf("cvmx-flash: Timeout writing block\n");
580                     cvmx_dprintf("cvmx-flash: Hardware failure erasing block\n");
591             __cvmx_flash_write_cmd(chip_id, 0x00, 0xff); /* Reset the flash chip */
597     cvmx_dprintf("cvmx-flash: Unsupported flash vendor\n");
604  * Erase and write data to a flash
626         cvmx_dprintf("cvmx-flash: Unable to find chip that contains address %p\n", address);
630     cvmx_flash_t *flash = flash_info + chip_id;
633     void *region_base = flash->base_ptr;
635     while (region_base + flash->region[region].num_blocks * flash->region[region].block_size <= address)
638         region_base = flash->base_ptr + flash->region[region].start_offset;
642     int block = (address - region_base) / flash->region[region].block_size;
645     if (address != region_base + block*flash->region[region].block_size)
647         cvmx_dprintf("cvmx-flash: Write address not aligned on a block boundry\n");
662         data += flash->region[region].block_size;
663         len -= flash->region[region].block_size;
665         if (block >= flash->region[region].num_blocks)