1157001Sgshapiro/* 2168515Sgshapiro * Sonics Silicon Backplane 3157001Sgshapiro * ChipCommon serial flash interface 4157001Sgshapiro * 5157001Sgshapiro * Licensed under the GNU/GPL. See COPYING for details. 6157001Sgshapiro */ 7157001Sgshapiro 8157001Sgshapiro#include "ssb_private.h" 9157001Sgshapiro 10157001Sgshapiro#include <linux/ssb/ssb.h> 11168515Sgshapiro 12157001Sgshapirostatic struct resource ssb_sflash_resource = { 13157001Sgshapiro .name = "ssb_sflash", 14168515Sgshapiro .start = SSB_FLASH2, 15157001Sgshapiro .end = 0, 16157001Sgshapiro .flags = IORESOURCE_MEM | IORESOURCE_READONLY, 17157001Sgshapiro}; 18157001Sgshapiro 19157001Sgshapirostruct platform_device ssb_sflash_dev = { 20157001Sgshapiro .name = "ssb_sflash", 21157001Sgshapiro .resource = &ssb_sflash_resource, 22157001Sgshapiro .num_resources = 1, 23157001Sgshapiro}; 24157001Sgshapiro 25157001Sgshapirostruct ssb_sflash_tbl_e { 26157001Sgshapiro char *name; 27157001Sgshapiro u32 id; 28157001Sgshapiro u32 blocksize; 29157001Sgshapiro u16 numblocks; 30157001Sgshapiro}; 31157001Sgshapiro 32157001Sgshapirostatic const struct ssb_sflash_tbl_e ssb_sflash_st_tbl[] = { 33157001Sgshapiro { "M25P20", 0x11, 0x10000, 4, }, 34157001Sgshapiro { "M25P40", 0x12, 0x10000, 8, }, 35157001Sgshapiro 36157001Sgshapiro { "M25P16", 0x14, 0x10000, 32, }, 37157001Sgshapiro { "M25P32", 0x15, 0x10000, 64, }, 38157001Sgshapiro { "M25P64", 0x16, 0x10000, 128, }, 39157001Sgshapiro { "M25FL128", 0x17, 0x10000, 256, }, 40157001Sgshapiro { NULL }, 41157001Sgshapiro}; 42157001Sgshapiro 43157001Sgshapirostatic const struct ssb_sflash_tbl_e ssb_sflash_sst_tbl[] = { 44157001Sgshapiro { "SST25WF512", 1, 0x1000, 16, }, 45157001Sgshapiro { "SST25VF512", 0x48, 0x1000, 16, }, 46157001Sgshapiro { "SST25WF010", 2, 0x1000, 32, }, 47157001Sgshapiro { "SST25VF010", 0x49, 0x1000, 32, }, 48157001Sgshapiro { "SST25WF020", 3, 0x1000, 64, }, 49157001Sgshapiro { "SST25VF020", 0x43, 0x1000, 64, }, 50157001Sgshapiro { "SST25WF040", 4, 0x1000, 128, }, 51157001Sgshapiro { "SST25VF040", 0x44, 0x1000, 128, }, 52157001Sgshapiro { "SST25VF040B", 0x8d, 0x1000, 128, }, 53157001Sgshapiro { "SST25WF080", 5, 0x1000, 256, }, 54157001Sgshapiro { "SST25VF080B", 0x8e, 0x1000, 256, }, 55157001Sgshapiro { "SST25VF016", 0x41, 0x1000, 512, }, 56157001Sgshapiro { "SST25VF032", 0x4a, 0x1000, 1024, }, 57157001Sgshapiro { "SST25VF064", 0x4b, 0x1000, 2048, }, 58157001Sgshapiro { NULL }, 59157001Sgshapiro}; 60157001Sgshapiro 61157001Sgshapirostatic const struct ssb_sflash_tbl_e ssb_sflash_at_tbl[] = { 62157001Sgshapiro { "AT45DB011", 0xc, 256, 512, }, 63157001Sgshapiro { "AT45DB021", 0x14, 256, 1024, }, 64157001Sgshapiro { "AT45DB041", 0x1c, 256, 2048, }, 65157001Sgshapiro { "AT45DB081", 0x24, 256, 4096, }, 66157001Sgshapiro { "AT45DB161", 0x2c, 512, 4096, }, 67157001Sgshapiro { "AT45DB321", 0x34, 512, 8192, }, 68157001Sgshapiro { "AT45DB642", 0x3c, 1024, 8192, }, 69157001Sgshapiro { NULL }, 70157001Sgshapiro}; 71157001Sgshapiro 72157001Sgshapirostatic void ssb_sflash_cmd(struct ssb_chipcommon *cc, u32 opcode) 73157001Sgshapiro{ 74157001Sgshapiro int i; 75157001Sgshapiro chipco_write32(cc, SSB_CHIPCO_FLASHCTL, 76157001Sgshapiro SSB_CHIPCO_FLASHCTL_START | opcode); 77157001Sgshapiro for (i = 0; i < 1000; i++) { 78157001Sgshapiro if (!(chipco_read32(cc, SSB_CHIPCO_FLASHCTL) & 79157001Sgshapiro SSB_CHIPCO_FLASHCTL_BUSY)) 80157001Sgshapiro return; 81157001Sgshapiro cpu_relax(); 82157001Sgshapiro } 83157001Sgshapiro dev_err(cc->dev->dev, "SFLASH control command failed (timeout)!\n"); 84157001Sgshapiro} 85157001Sgshapiro 86157001Sgshapiro/* Initialize serial flash access */ 87157001Sgshapiroint ssb_sflash_init(struct ssb_chipcommon *cc) 88157001Sgshapiro{ 89157001Sgshapiro struct ssb_sflash *sflash = &cc->dev->bus->mipscore.sflash; 90157001Sgshapiro const struct ssb_sflash_tbl_e *e; 91157001Sgshapiro u32 id, id2; 92157001Sgshapiro 93157001Sgshapiro switch (cc->capabilities & SSB_CHIPCO_CAP_FLASHT) { 94157001Sgshapiro case SSB_CHIPCO_FLASHT_STSER: 95157001Sgshapiro ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_DP); 96157001Sgshapiro 97157001Sgshapiro chipco_write32(cc, SSB_CHIPCO_FLASHADDR, 0); 98157001Sgshapiro ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_RES); 99157001Sgshapiro id = chipco_read32(cc, SSB_CHIPCO_FLASHDATA); 100157001Sgshapiro 101157001Sgshapiro chipco_write32(cc, SSB_CHIPCO_FLASHADDR, 1); 102157001Sgshapiro ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_ST_RES); 103157001Sgshapiro id2 = chipco_read32(cc, SSB_CHIPCO_FLASHDATA); 104157001Sgshapiro 105157001Sgshapiro switch (id) { 106157001Sgshapiro case 0xbf: 107157001Sgshapiro for (e = ssb_sflash_sst_tbl; e->name; e++) { 108157001Sgshapiro if (e->id == id2) 109157001Sgshapiro break; 110157001Sgshapiro } 111157001Sgshapiro break; 112157001Sgshapiro case 0x13: 113157001Sgshapiro return -ENOTSUPP; 114157001Sgshapiro default: 115157001Sgshapiro for (e = ssb_sflash_st_tbl; e->name; e++) { 116157001Sgshapiro if (e->id == id) 117157001Sgshapiro break; 118157001Sgshapiro } 119157001Sgshapiro break; 120157001Sgshapiro } 121157001Sgshapiro if (!e->name) { 122157001Sgshapiro pr_err("Unsupported ST serial flash (id: 0x%X, id2: 0x%X)\n", 123157001Sgshapiro id, id2); 124157001Sgshapiro return -ENOTSUPP; 125157001Sgshapiro } 126157001Sgshapiro 127157001Sgshapiro break; 128157001Sgshapiro case SSB_CHIPCO_FLASHT_ATSER: 129157001Sgshapiro ssb_sflash_cmd(cc, SSB_CHIPCO_FLASHCTL_AT_STATUS); 130157001Sgshapiro id = chipco_read32(cc, SSB_CHIPCO_FLASHDATA) & 0x3c; 131157001Sgshapiro 132157001Sgshapiro for (e = ssb_sflash_at_tbl; e->name; e++) { 133157001Sgshapiro if (e->id == id) 134157001Sgshapiro break; 135157001Sgshapiro } 136157001Sgshapiro if (!e->name) { 137157001Sgshapiro pr_err("Unsupported Atmel serial flash (id: 0x%X)\n", 138157001Sgshapiro id); 139157001Sgshapiro return -ENOTSUPP; 140157001Sgshapiro } 141157001Sgshapiro 142157001Sgshapiro break; 143157001Sgshapiro default: 144157001Sgshapiro pr_err("Unsupported flash type\n"); 145157001Sgshapiro return -ENOTSUPP; 146157001Sgshapiro } 147157001Sgshapiro 148157001Sgshapiro sflash->window = SSB_FLASH2; 149157001Sgshapiro sflash->blocksize = e->blocksize; 150157001Sgshapiro sflash->numblocks = e->numblocks; 151157001Sgshapiro sflash->size = sflash->blocksize * sflash->numblocks; 152157001Sgshapiro sflash->present = true; 153157001Sgshapiro 154157001Sgshapiro pr_info("Found %s serial flash (size: %dKiB, blocksize: 0x%X, blocks: %d)\n", 155157001Sgshapiro e->name, sflash->size / 1024, e->blocksize, e->numblocks); 156157001Sgshapiro 157157001Sgshapiro /* Prepare platform device, but don't register it yet. It's too early, 158157001Sgshapiro * malloc (required by device_private_init) is not available yet. */ 159157001Sgshapiro ssb_sflash_dev.resource[0].end = ssb_sflash_dev.resource[0].start + 160157001Sgshapiro sflash->size; 161157001Sgshapiro ssb_sflash_dev.dev.platform_data = sflash; 162157001Sgshapiro 163157001Sgshapiro return 0; 164157001Sgshapiro} 165157001Sgshapiro