/* * Sonics Silicon Backplane * ChipCommon serial flash interface * * Licensed under the GNU/GPL. See COPYING for details. */ #include <linux/ssb/ssb.h> #include "ssb_private.h" struct ssb_sflash_tbl_e { char *name; u32 id; u32 blocksize; u16 numblocks; }; static struct ssb_sflash_tbl_e ssb_sflash_st_tbl[] = { { "M25P20", 0x11, 0x10000, 4, }, { "M25P40", 0x12, 0x10000, 8, }, { "M25P16", 0x14, 0x10000, 32, }, { "M25P32", 0x15, 0x10000, 64, }, { "M25P64", 0x16, 0x10000, 128, }, { "M25FL128", 0x17, 0x10000, 256, }, { 0 }, }; static struct ssb_sflash_tbl_e ssb_sflash_sst_tbl[] = { { "SST25WF512", 1, 0x1000, 16, }, { "SST25VF512", 0x48, 0x1000, 16, }, { "SST25WF010", 2, 0x1000, 32, }, { "SST25VF010", 0x49, 0x1000, 32, }, { "SST25WF020", 3, 0x1000, 64, }, { "SST25VF020", 0x43, 0x1000, 64, }, { "SST25WF040", 4, 0x1000, 128, }, { "SST25VF040", 0x44, 0x1000, 128, }, { "SST25VF040B", 0x8d, 0x1000, 128, }, { "SST25WF080", 5, 0x1000, 256, }, { "SST25VF080B", 0x8e, 0x1000, 256, }, { "SST25VF016", 0x41, 0x1000, 512, }, { "SST25VF032", 0x4a, 0x1000, 1024, }, { "SST25VF064", 0x4b, 0x1000, 2048, }, { 0 }, }; static struct ssb_sflash_tbl_e ssb_sflash_at_tbl[] = { { "AT45DB011", 0xc, 256, 512, }, { "AT45DB021", 0x14, 256, 1024, }, { "AT45DB041", 0x1c, 256, 2048, }, { "AT45DB081", 0x24, 256, 4096, }, { "AT45DB161", 0x2c, 512, 4096, }, { "AT45DB321", 0x34, 512, 8192, }, { "AT45DB642", 0x3c, 1024, 8192, }, { 0 }, }; static void ssb_sflash_cmd(struct ssb_chipcommon *cc, u32 opcode) { int i; chipco_write32(cc, SSB_CHIPCO_FLASHCTL, SSB_CHIPCO_FLASHCTL_START | opcode); for (i = 0; i < 1000; i++) { if (!(chipco_read32(cc, SSB_CHIPCO_FLASHCTL) & SSB_CHIPCO_FLASHCTL_BUSY)) return; cpu_relax(); } pr_err("SFLASH control command failed (timeout)!\n"); } /* Initialize serial flash access */ int ssb_sflash_init(struct ssb_chipcommon *cc) { struct ssb_sflash_tbl_e *e; u32 id, id2; switch (cc->capabilities & SSB_CHIPCO_CAP_FLASHT) { case SSB_CHIPCO_FLASHT_STSER: ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_DP); chipco_write32(cc, SSB_CHIPCO_FLASHADDR, 0); ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_RES); id = chipco_read32(cc, SSB_CHIPCO_FLASHDATA); chipco_write32(cc, SSB_CHIPCO_FLASHADDR, 1); ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_RES); id2 = chipco_read32(cc, SSB_CHIPCO_FLASHDATA); switch (id) { case 0xbf: for (e = ssb_sflash_sst_tbl; e->name; e++) { if (e->id == id2) break; } break; case 0x13: return -ENOTSUPP; default: for (e = ssb_sflash_st_tbl; e->name; e++) { if (e->id == id) break; } break; } if (!e->name) { pr_err("Unsupported ST serial flash (id: 0x%X, id2: 0x%X)\n", id, id2); return -ENOTSUPP; } break; case SSB_CHIPCO_FLASHT_ATSER: ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_AT_STATUS); id = chipco_read32(cc, SSB_CHIPCO_FLASHDATA) & 0x3c; for (e = ssb_sflash_at_tbl; e->name; e++) { if (e->id == id) break; } if (!e->name) { pr_err("Unsupported Atmel serial flash (id: 0x%X)\n", id); return -ENOTSUPP; } break; default: pr_err("Unsupported flash type\n"); return -ENOTSUPP; } pr_info("Found %s serial flash (blocksize: 0x%X, blocks: %d)\n", e->name, e->blocksize, e->numblocks); pr_err("Serial flash support is not implemented yet!\n"); return -ENOTSUPP; }