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ichspi.c
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ichspi.c
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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2008 Stefan Wildemann <stefan.wildemann@kontron.com>
* Copyright (C) 2008 Claus Gindhart <claus.gindhart@kontron.com>
* Copyright (C) 2008 Dominik Geyer <dominik.geyer@kontron.com>
* Copyright (C) 2008 coresystems GmbH <info@coresystems.de>
* Copyright (C) 2009, 2010 Carl-Daniel Hailfinger
* Copyright (C) 2011 Stefan Tauner
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#if defined(__i386__) || defined(__x86_64__)
#include <string.h>
#include <stdlib.h>
#include "flash.h"
#include "programmer.h"
#include "hwaccess.h"
#include "spi.h"
#include "ich_descriptors.h"
/* ICH9 controller register definition */
#define ICH9_REG_HSFS 0x04 /* 16 Bits Hardware Sequencing Flash Status */
#define HSFS_FDONE_OFF 0 /* 0: Flash Cycle Done */
#define HSFS_FDONE (0x1 << HSFS_FDONE_OFF)
#define HSFS_FCERR_OFF 1 /* 1: Flash Cycle Error */
#define HSFS_FCERR (0x1 << HSFS_FCERR_OFF)
#define HSFS_AEL_OFF 2 /* 2: Access Error Log */
#define HSFS_AEL (0x1 << HSFS_AEL_OFF)
#define HSFS_BERASE_OFF 3 /* 3-4: Block/Sector Erase Size */
#define HSFS_BERASE (0x3 << HSFS_BERASE_OFF)
#define HSFS_SCIP_OFF 5 /* 5: SPI Cycle In Progress */
#define HSFS_SCIP (0x1 << HSFS_SCIP_OFF)
/* 6-12: reserved */
#define HSFS_FDOPSS_OFF 13 /* 13: Flash Descriptor Override Pin-Strap Status */
#define HSFS_FDOPSS (0x1 << HSFS_FDOPSS_OFF)
#define HSFS_FDV_OFF 14 /* 14: Flash Descriptor Valid */
#define HSFS_FDV (0x1 << HSFS_FDV_OFF)
#define HSFS_FLOCKDN_OFF 15 /* 15: Flash Configuration Lock-Down */
#define HSFS_FLOCKDN (0x1 << HSFS_FLOCKDN_OFF)
#define ICH9_REG_HSFC 0x06 /* 16 Bits Hardware Sequencing Flash Control */
#define HSFC_FGO_OFF 0 /* 0: Flash Cycle Go */
#define HSFC_FGO (0x1 << HSFC_FGO_OFF)
#define HSFC_FCYCLE_OFF 1 /* 1-2: FLASH Cycle */
#define HSFC_FCYCLE (0x3 << HSFC_FCYCLE_OFF)
/* 3-7: reserved */
#define HSFC_FDBC_OFF 8 /* 8-13: Flash Data Byte Count */
#define HSFC_FDBC (0x3f << HSFC_FDBC_OFF)
/* 14: reserved */
#define HSFC_SME_OFF 15 /* 15: SPI SMI# Enable */
#define HSFC_SME (0x1 << HSFC_SME_OFF)
#define ICH9_REG_FADDR 0x08 /* 32 Bits */
#define ICH9_REG_FDATA0 0x10 /* 64 Bytes */
#define ICH9_REG_FRAP 0x50 /* 32 Bytes Flash Region Access Permissions */
#define ICH9_REG_FREG0 0x54 /* 32 Bytes Flash Region 0 */
#define ICH9_REG_PR0 0x74 /* 32 Bytes Protected Range 0 */
#define PR_WP_OFF 31 /* 31: write protection enable */
#define PR_RP_OFF 15 /* 15: read protection enable */
#define ICH9_REG_SSFS 0x90 /* 08 Bits */
#define SSFS_SCIP_OFF 0 /* SPI Cycle In Progress */
#define SSFS_SCIP (0x1 << SSFS_SCIP_OFF)
#define SSFS_FDONE_OFF 2 /* Cycle Done Status */
#define SSFS_FDONE (0x1 << SSFS_FDONE_OFF)
#define SSFS_FCERR_OFF 3 /* Flash Cycle Error */
#define SSFS_FCERR (0x1 << SSFS_FCERR_OFF)
#define SSFS_AEL_OFF 4 /* Access Error Log */
#define SSFS_AEL (0x1 << SSFS_AEL_OFF)
/* The following bits are reserved in SSFS: 1,5-7. */
#define SSFS_RESERVED_MASK 0x000000e2
#define ICH9_REG_SSFC 0x91 /* 24 Bits */
/* We combine SSFS and SSFC to one 32-bit word,
* therefore SSFC bits are off by 8. */
/* 0: reserved */
#define SSFC_SCGO_OFF (1 + 8) /* 1: SPI Cycle Go */
#define SSFC_SCGO (0x1 << SSFC_SCGO_OFF)
#define SSFC_ACS_OFF (2 + 8) /* 2: Atomic Cycle Sequence */
#define SSFC_ACS (0x1 << SSFC_ACS_OFF)
#define SSFC_SPOP_OFF (3 + 8) /* 3: Sequence Prefix Opcode Pointer */
#define SSFC_SPOP (0x1 << SSFC_SPOP_OFF)
#define SSFC_COP_OFF (4 + 8) /* 4-6: Cycle Opcode Pointer */
#define SSFC_COP (0x7 << SSFC_COP_OFF)
/* 7: reserved */
#define SSFC_DBC_OFF (8 + 8) /* 8-13: Data Byte Count */
#define SSFC_DBC (0x3f << SSFC_DBC_OFF)
#define SSFC_DS_OFF (14 + 8) /* 14: Data Cycle */
#define SSFC_DS (0x1 << SSFC_DS_OFF)
#define SSFC_SME_OFF (15 + 8) /* 15: SPI SMI# Enable */
#define SSFC_SME (0x1 << SSFC_SME_OFF)
#define SSFC_SCF_OFF (16 + 8) /* 16-18: SPI Cycle Frequency */
#define SSFC_SCF (0x7 << SSFC_SCF_OFF)
#define SSFC_SCF_20MHZ 0x00000000
#define SSFC_SCF_33MHZ 0x01000000
/* 19-23: reserved */
#define SSFC_RESERVED_MASK 0xf8008100
#define ICH9_REG_PREOP 0x94 /* 16 Bits */
#define ICH9_REG_OPTYPE 0x96 /* 16 Bits */
#define ICH9_REG_OPMENU 0x98 /* 64 Bits */
#define ICH9_REG_BBAR 0xA0 /* 32 Bits BIOS Base Address Configuration */
#define BBAR_MASK 0x00ffff00 /* 8-23: Bottom of System Flash */
#define ICH8_REG_VSCC 0xC1 /* 32 Bits Vendor Specific Component Capabilities */
#define ICH9_REG_LVSCC 0xC4 /* 32 Bits Host Lower Vendor Specific Component Capabilities */
#define ICH9_REG_UVSCC 0xC8 /* 32 Bits Host Upper Vendor Specific Component Capabilities */
/* The individual fields of the VSCC registers are defined in the file
* ich_descriptors.h. The reason is that the same layout is also used in the
* flash descriptor to define the properties of the different flash chips
* supported. The BIOS (or the ME?) is responsible to populate the ICH registers
* with the information from the descriptor on startup depending on the actual
* chip(s) detected. */
#define ICH9_REG_FPB 0xD0 /* 32 Bits Flash Partition Boundary */
#define FPB_FPBA_OFF 0 /* 0-12: Block/Sector Erase Size */
#define FPB_FPBA (0x1FFF << FPB_FPBA_OFF)
// ICH9R SPI commands
#define SPI_OPCODE_TYPE_READ_NO_ADDRESS 0
#define SPI_OPCODE_TYPE_WRITE_NO_ADDRESS 1
#define SPI_OPCODE_TYPE_READ_WITH_ADDRESS 2
#define SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS 3
// ICH7 registers
#define ICH7_REG_SPIS 0x00 /* 16 Bits */
#define SPIS_SCIP 0x0001
#define SPIS_GRANT 0x0002
#define SPIS_CDS 0x0004
#define SPIS_FCERR 0x0008
#define SPIS_RESERVED_MASK 0x7ff0
/* VIA SPI is compatible with ICH7, but maxdata
to transfer is 16 bytes.
DATA byte count on ICH7 is 8:13, on VIA 8:11
bit 12 is port select CS0 CS1
bit 13 is FAST READ enable
bit 7 is used with fast read and one shot controls CS de-assert?
*/
#define ICH7_REG_SPIC 0x02 /* 16 Bits */
#define SPIC_SCGO 0x0002
#define SPIC_ACS 0x0004
#define SPIC_SPOP 0x0008
#define SPIC_DS 0x4000
#define ICH7_REG_SPIA 0x04 /* 32 Bits */
#define ICH7_REG_SPID0 0x08 /* 64 Bytes */
#define ICH7_REG_PREOP 0x54 /* 16 Bits */
#define ICH7_REG_OPTYPE 0x56 /* 16 Bits */
#define ICH7_REG_OPMENU 0x58 /* 64 Bits */
/* ICH SPI configuration lock-down. May be set during chipset enabling. */
static int ichspi_lock = 0;
static enum ich_chipset ich_generation = CHIPSET_ICH_UNKNOWN;
uint32_t ichspi_bbar = 0;
static void *ich_spibar = NULL;
typedef struct _OPCODE {
uint8_t opcode; //This commands spi opcode
uint8_t spi_type; //This commands spi type
uint8_t atomic; //Use preop: (0: none, 1: preop0, 2: preop1
} OPCODE;
/* Suggested opcode definition:
* Preop 1: Write Enable
* Preop 2: Write Status register enable
*
* OP 0: Write address
* OP 1: Read Address
* OP 2: ERASE block
* OP 3: Read Status register
* OP 4: Read ID
* OP 5: Write Status register
* OP 6: chip private (read JEDEC id)
* OP 7: Chip erase
*/
typedef struct _OPCODES {
uint8_t preop[2];
OPCODE opcode[8];
} OPCODES;
static OPCODES *curopcodes = NULL;
/* HW access functions */
static uint32_t REGREAD32(int X)
{
return mmio_readl(ich_spibar + X);
}
static uint16_t REGREAD16(int X)
{
return mmio_readw(ich_spibar + X);
}
static uint16_t REGREAD8(int X)
{
return mmio_readb(ich_spibar + X);
}
#define REGWRITE32(off, val) mmio_writel(val, ich_spibar+(off))
#define REGWRITE16(off, val) mmio_writew(val, ich_spibar+(off))
#define REGWRITE8(off, val) mmio_writeb(val, ich_spibar+(off))
/* Common SPI functions */
static int find_opcode(OPCODES *op, uint8_t opcode);
static int find_preop(OPCODES *op, uint8_t preop);
static int generate_opcodes(OPCODES * op);
static int program_opcodes(OPCODES *op, int enable_undo);
static int run_opcode(const struct flashctx *flash, OPCODE op, uint32_t offset,
uint8_t datalength, uint8_t * data);
/* for pairing opcodes with their required preop */
struct preop_opcode_pair {
uint8_t preop;
uint8_t opcode;
};
/* List of opcodes which need preopcodes and matching preopcodes. Unused. */
const struct preop_opcode_pair pops[] = {
{JEDEC_WREN, JEDEC_BYTE_PROGRAM},
{JEDEC_WREN, JEDEC_SE}, /* sector erase */
{JEDEC_WREN, JEDEC_BE_52}, /* block erase */
{JEDEC_WREN, JEDEC_BE_D8}, /* block erase */
{JEDEC_WREN, JEDEC_CE_60}, /* chip erase */
{JEDEC_WREN, JEDEC_CE_C7}, /* chip erase */
/* FIXME: WRSR requires either EWSR or WREN depending on chip type. */
{JEDEC_WREN, JEDEC_WRSR},
{JEDEC_EWSR, JEDEC_WRSR},
{0,}
};
/* Reasonable default configuration. Needs ad-hoc modifications if we
* encounter unlisted opcodes. Fun.
*/
static OPCODES O_ST_M25P = {
{
JEDEC_WREN,
JEDEC_EWSR,
},
{
{JEDEC_BYTE_PROGRAM, SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS, 0}, // Write Byte
{JEDEC_READ, SPI_OPCODE_TYPE_READ_WITH_ADDRESS, 0}, // Read Data
{JEDEC_BE_D8, SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS, 0}, // Erase Sector
{JEDEC_RDSR, SPI_OPCODE_TYPE_READ_NO_ADDRESS, 0}, // Read Device Status Reg
{JEDEC_REMS, SPI_OPCODE_TYPE_READ_WITH_ADDRESS, 0}, // Read Electronic Manufacturer Signature
{JEDEC_WRSR, SPI_OPCODE_TYPE_WRITE_NO_ADDRESS, 0}, // Write Status Register
{JEDEC_RDID, SPI_OPCODE_TYPE_READ_NO_ADDRESS, 0}, // Read JDEC ID
{JEDEC_CE_C7, SPI_OPCODE_TYPE_WRITE_NO_ADDRESS, 0}, // Bulk erase
}
};
/* List of opcodes with their corresponding spi_type
* It is used to reprogram the chipset OPCODE table on-the-fly if an opcode
* is needed which is currently not in the chipset OPCODE table
*/
static OPCODE POSSIBLE_OPCODES[] = {
{JEDEC_BYTE_PROGRAM, SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS, 0}, // Write Byte
{JEDEC_READ, SPI_OPCODE_TYPE_READ_WITH_ADDRESS, 0}, // Read Data
{JEDEC_BE_D8, SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS, 0}, // Erase Sector
{JEDEC_RDSR, SPI_OPCODE_TYPE_READ_NO_ADDRESS, 0}, // Read Device Status Reg
{JEDEC_REMS, SPI_OPCODE_TYPE_READ_WITH_ADDRESS, 0}, // Read Electronic Manufacturer Signature
{JEDEC_WRSR, SPI_OPCODE_TYPE_WRITE_NO_ADDRESS, 0}, // Write Status Register
{JEDEC_RDID, SPI_OPCODE_TYPE_READ_NO_ADDRESS, 0}, // Read JDEC ID
{JEDEC_CE_C7, SPI_OPCODE_TYPE_WRITE_NO_ADDRESS, 0}, // Bulk erase
{JEDEC_SE, SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS, 0}, // Sector erase
{JEDEC_BE_52, SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS, 0}, // Block erase
{JEDEC_AAI_WORD_PROGRAM, SPI_OPCODE_TYPE_WRITE_NO_ADDRESS, 0}, // Auto Address Increment
};
static OPCODES O_EXISTING = {};
/* pretty printing functions */
static void prettyprint_opcodes(OPCODES *ops)
{
OPCODE oc;
const char *t;
const char *a;
uint8_t i;
static const char *const spi_type[4] = {
"read w/o addr",
"write w/o addr",
"read w/ addr",
"write w/ addr"
};
static const char *const atomic_type[3] = {
"none",
" 0 ",
" 1 "
};
if (ops == NULL)
return;
msg_pdbg2(" OP Type Pre-OP\n");
for (i = 0; i < 8; i++) {
oc = ops->opcode[i];
t = (oc.spi_type > 3) ? "invalid" : spi_type[oc.spi_type];
a = (oc.atomic > 2) ? "invalid" : atomic_type[oc.atomic];
msg_pdbg2("op[%d]: 0x%02x, %s, %s\n", i, oc.opcode, t, a);
}
msg_pdbg2("Pre-OP 0: 0x%02x, Pre-OP 1: 0x%02x\n", ops->preop[0],
ops->preop[1]);
}
#define pprint_reg(reg, bit, val, sep) msg_pdbg("%s=%d" sep, #bit, (val & reg##_##bit)>>reg##_##bit##_OFF)
static void prettyprint_ich9_reg_hsfs(uint16_t reg_val)
{
msg_pdbg("HSFS: ");
pprint_reg(HSFS, FDONE, reg_val, ", ");
pprint_reg(HSFS, FCERR, reg_val, ", ");
pprint_reg(HSFS, AEL, reg_val, ", ");
pprint_reg(HSFS, BERASE, reg_val, ", ");
pprint_reg(HSFS, SCIP, reg_val, ", ");
pprint_reg(HSFS, FDOPSS, reg_val, ", ");
pprint_reg(HSFS, FDV, reg_val, ", ");
pprint_reg(HSFS, FLOCKDN, reg_val, "\n");
}
static void prettyprint_ich9_reg_hsfc(uint16_t reg_val)
{
msg_pdbg("HSFC: ");
pprint_reg(HSFC, FGO, reg_val, ", ");
pprint_reg(HSFC, FCYCLE, reg_val, ", ");
pprint_reg(HSFC, FDBC, reg_val, ", ");
pprint_reg(HSFC, SME, reg_val, "\n");
}
static void prettyprint_ich9_reg_ssfs(uint32_t reg_val)
{
msg_pdbg("SSFS: ");
pprint_reg(SSFS, SCIP, reg_val, ", ");
pprint_reg(SSFS, FDONE, reg_val, ", ");
pprint_reg(SSFS, FCERR, reg_val, ", ");
pprint_reg(SSFS, AEL, reg_val, "\n");
}
static void prettyprint_ich9_reg_ssfc(uint32_t reg_val)
{
msg_pdbg("SSFC: ");
pprint_reg(SSFC, SCGO, reg_val, ", ");
pprint_reg(SSFC, ACS, reg_val, ", ");
pprint_reg(SSFC, SPOP, reg_val, ", ");
pprint_reg(SSFC, COP, reg_val, ", ");
pprint_reg(SSFC, DBC, reg_val, ", ");
pprint_reg(SSFC, SME, reg_val, ", ");
pprint_reg(SSFC, SCF, reg_val, "\n");
}
static uint8_t lookup_spi_type(uint8_t opcode)
{
int a;
for (a = 0; a < ARRAY_SIZE(POSSIBLE_OPCODES); a++) {
if (POSSIBLE_OPCODES[a].opcode == opcode)
return POSSIBLE_OPCODES[a].spi_type;
}
return 0xFF;
}
static int reprogram_opcode_on_the_fly(uint8_t opcode, unsigned int writecnt, unsigned int readcnt)
{
uint8_t spi_type;
spi_type = lookup_spi_type(opcode);
if (spi_type > 3) {
/* Try to guess spi type from read/write sizes.
* The following valid writecnt/readcnt combinations exist:
* writecnt = 4, readcnt >= 0
* writecnt = 1, readcnt >= 0
* writecnt >= 4, readcnt = 0
* writecnt >= 1, readcnt = 0
* writecnt >= 1 is guaranteed for all commands.
*/
if (readcnt == 0)
/* if readcnt=0 and writecount >= 4, we don't know if it is WRITE_NO_ADDRESS
* or WRITE_WITH_ADDRESS. But if we use WRITE_NO_ADDRESS and the first 3 data
* bytes are actual the address, they go to the bus anyhow
*/
spi_type = SPI_OPCODE_TYPE_WRITE_NO_ADDRESS;
else if (writecnt == 1) // and readcnt is > 0
spi_type = SPI_OPCODE_TYPE_READ_NO_ADDRESS;
else if (writecnt == 4) // and readcnt is > 0
spi_type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS;
else // we have an invalid case
return SPI_INVALID_LENGTH;
}
int oppos = 2; // use original JEDEC_BE_D8 offset
curopcodes->opcode[oppos].opcode = opcode;
curopcodes->opcode[oppos].spi_type = spi_type;
program_opcodes(curopcodes, 0);
oppos = find_opcode(curopcodes, opcode);
msg_pdbg2("on-the-fly OPCODE (0x%02X) re-programmed, op-pos=%d\n", opcode, oppos);
return oppos;
}
static int find_opcode(OPCODES *op, uint8_t opcode)
{
int a;
if (op == NULL) {
msg_perr("\n%s: null OPCODES pointer!\n", __func__);
return -1;
}
for (a = 0; a < 8; a++) {
if (op->opcode[a].opcode == opcode)
return a;
}
return -1;
}
static int find_preop(OPCODES *op, uint8_t preop)
{
int a;
if (op == NULL) {
msg_perr("\n%s: null OPCODES pointer!\n", __func__);
return -1;
}
for (a = 0; a < 2; a++) {
if (op->preop[a] == preop)
return a;
}
return -1;
}
/* Create a struct OPCODES based on what we find in the locked down chipset. */
static int generate_opcodes(OPCODES * op)
{
int a;
uint16_t preop, optype;
uint32_t opmenu[2];
if (op == NULL) {
msg_perr("\n%s: null OPCODES pointer!\n", __func__);
return -1;
}
switch (ich_generation) {
case CHIPSET_ICH7:
case CHIPSET_TUNNEL_CREEK:
case CHIPSET_CENTERTON:
preop = REGREAD16(ICH7_REG_PREOP);
optype = REGREAD16(ICH7_REG_OPTYPE);
opmenu[0] = REGREAD32(ICH7_REG_OPMENU);
opmenu[1] = REGREAD32(ICH7_REG_OPMENU + 4);
break;
case CHIPSET_ICH8:
default: /* Future version might behave the same */
preop = REGREAD16(ICH9_REG_PREOP);
optype = REGREAD16(ICH9_REG_OPTYPE);
opmenu[0] = REGREAD32(ICH9_REG_OPMENU);
opmenu[1] = REGREAD32(ICH9_REG_OPMENU + 4);
break;
}
op->preop[0] = (uint8_t) preop;
op->preop[1] = (uint8_t) (preop >> 8);
for (a = 0; a < 8; a++) {
op->opcode[a].spi_type = (uint8_t) (optype & 0x3);
optype >>= 2;
}
for (a = 0; a < 4; a++) {
op->opcode[a].opcode = (uint8_t) (opmenu[0] & 0xff);
opmenu[0] >>= 8;
}
for (a = 4; a < 8; a++) {
op->opcode[a].opcode = (uint8_t) (opmenu[1] & 0xff);
opmenu[1] >>= 8;
}
/* No preopcodes used by default. */
for (a = 0; a < 8; a++)
op->opcode[a].atomic = 0;
return 0;
}
static int program_opcodes(OPCODES *op, int enable_undo)
{
uint8_t a;
uint16_t preop, optype;
uint32_t opmenu[2];
/* Program Prefix Opcodes */
/* 0:7 Prefix Opcode 1 */
preop = (op->preop[0]);
/* 8:16 Prefix Opcode 2 */
preop |= ((uint16_t) op->preop[1]) << 8;
/* Program Opcode Types 0 - 7 */
optype = 0;
for (a = 0; a < 8; a++) {
optype |= ((uint16_t) op->opcode[a].spi_type) << (a * 2);
}
/* Program Allowable Opcodes 0 - 3 */
opmenu[0] = 0;
for (a = 0; a < 4; a++) {
opmenu[0] |= ((uint32_t) op->opcode[a].opcode) << (a * 8);
}
/* Program Allowable Opcodes 4 - 7 */
opmenu[1] = 0;
for (a = 4; a < 8; a++) {
opmenu[1] |= ((uint32_t) op->opcode[a].opcode) << ((a - 4) * 8);
}
msg_pdbg2("\n%s: preop=%04x optype=%04x opmenu=%08x%08x\n", __func__, preop, optype, opmenu[0], opmenu[1]);
switch (ich_generation) {
case CHIPSET_ICH7:
case CHIPSET_TUNNEL_CREEK:
case CHIPSET_CENTERTON:
/* Register undo only for enable_undo=1, i.e. first call. */
if (enable_undo) {
rmmio_valw(ich_spibar + ICH7_REG_PREOP);
rmmio_valw(ich_spibar + ICH7_REG_OPTYPE);
rmmio_vall(ich_spibar + ICH7_REG_OPMENU);
rmmio_vall(ich_spibar + ICH7_REG_OPMENU + 4);
}
mmio_writew(preop, ich_spibar + ICH7_REG_PREOP);
mmio_writew(optype, ich_spibar + ICH7_REG_OPTYPE);
mmio_writel(opmenu[0], ich_spibar + ICH7_REG_OPMENU);
mmio_writel(opmenu[1], ich_spibar + ICH7_REG_OPMENU + 4);
break;
case CHIPSET_ICH8:
default: /* Future version might behave the same */
/* Register undo only for enable_undo=1, i.e. first call. */
if (enable_undo) {
rmmio_valw(ich_spibar + ICH9_REG_PREOP);
rmmio_valw(ich_spibar + ICH9_REG_OPTYPE);
rmmio_vall(ich_spibar + ICH9_REG_OPMENU);
rmmio_vall(ich_spibar + ICH9_REG_OPMENU + 4);
}
mmio_writew(preop, ich_spibar + ICH9_REG_PREOP);
mmio_writew(optype, ich_spibar + ICH9_REG_OPTYPE);
mmio_writel(opmenu[0], ich_spibar + ICH9_REG_OPMENU);
mmio_writel(opmenu[1], ich_spibar + ICH9_REG_OPMENU + 4);
break;
}
return 0;
}
/*
* Returns -1 if at least one mandatory opcode is inaccessible, 0 otherwise.
* FIXME: this should also check for
* - at least one probing opcode (RDID (incl. AT25F variants?), REMS, RES?)
* - at least one erasing opcode (lots.)
* - at least one program opcode (BYTE_PROGRAM, AAI_WORD_PROGRAM, ...?)
* - necessary preops? (EWSR, WREN, ...?)
*/
static int ich_missing_opcodes()
{
uint8_t ops[] = {
JEDEC_READ,
JEDEC_RDSR,
0
};
int i = 0;
while (ops[i] != 0) {
msg_pspew("checking for opcode 0x%02x\n", ops[i]);
if (find_opcode(curopcodes, ops[i]) == -1)
return -1;
i++;
}
return 0;
}
/*
* Try to set BBAR (BIOS Base Address Register), but read back the value in case
* it didn't stick.
*/
static void ich_set_bbar(uint32_t min_addr)
{
int bbar_off;
switch (ich_generation) {
case CHIPSET_ICH7:
case CHIPSET_TUNNEL_CREEK:
case CHIPSET_CENTERTON:
bbar_off = 0x50;
break;
case CHIPSET_ICH8:
case CHIPSET_BAYTRAIL:
msg_pdbg("BBAR offset is unknown!\n");
return;
case CHIPSET_ICH9:
default: /* Future version might behave the same */
bbar_off = ICH9_REG_BBAR;
break;
}
ichspi_bbar = mmio_readl(ich_spibar + bbar_off) & ~BBAR_MASK;
if (ichspi_bbar) {
msg_pdbg("Reserved bits in BBAR not zero: 0x%08x\n",
ichspi_bbar);
}
min_addr &= BBAR_MASK;
ichspi_bbar |= min_addr;
rmmio_writel(ichspi_bbar, ich_spibar + bbar_off);
ichspi_bbar = mmio_readl(ich_spibar + bbar_off) & BBAR_MASK;
/* We don't have any option except complaining. And if the write
* failed, the restore will fail as well, so no problem there.
*/
if (ichspi_bbar != min_addr)
msg_perr("Setting BBAR to 0x%08x failed! New value: 0x%08x.\n",
min_addr, ichspi_bbar);
}
/* Read len bytes from the fdata/spid register into the data array.
*
* Note that using len > flash->mst->spi.max_data_read will return garbage or
* may even crash.
*/
static void ich_read_data(uint8_t *data, int len, int reg0_off)
{
int i;
uint32_t temp32 = 0;
for (i = 0; i < len; i++) {
if ((i % 4) == 0)
temp32 = REGREAD32(reg0_off + i);
data[i] = (temp32 >> ((i % 4) * 8)) & 0xff;
}
}
/* Fill len bytes from the data array into the fdata/spid registers.
*
* Note that using len > flash->mst->spi.max_data_write will trash the registers
* following the data registers.
*/
static void ich_fill_data(const uint8_t *data, int len, int reg0_off)
{
uint32_t temp32 = 0;
int i;
if (len <= 0)
return;
for (i = 0; i < len; i++) {
if ((i % 4) == 0)
temp32 = 0;
temp32 |= ((uint32_t) data[i]) << ((i % 4) * 8);
if ((i % 4) == 3) /* 32 bits are full, write them to regs. */
REGWRITE32(reg0_off + (i - (i % 4)), temp32);
}
i--;
if ((i % 4) != 3) /* Write remaining data to regs. */
REGWRITE32(reg0_off + (i - (i % 4)), temp32);
}
/* This function generates OPCODES from or programs OPCODES to ICH according to
* the chipset's SPI configuration lock.
*
* It should be called before ICH sends any spi command.
*/
static int ich_init_opcodes(void)
{
int rc = 0;
OPCODES *curopcodes_done;
if (curopcodes)
return 0;
if (ichspi_lock) {
msg_pdbg("Reading OPCODES... ");
curopcodes_done = &O_EXISTING;
rc = generate_opcodes(curopcodes_done);
} else {
msg_pdbg("Programming OPCODES... ");
curopcodes_done = &O_ST_M25P;
rc = program_opcodes(curopcodes_done, 1);
}
if (rc) {
curopcodes = NULL;
msg_perr("failed\n");
return 1;
} else {
curopcodes = curopcodes_done;
msg_pdbg("done\n");
prettyprint_opcodes(curopcodes);
return 0;
}
}
static int ich7_run_opcode(OPCODE op, uint32_t offset,
uint8_t datalength, uint8_t * data, int maxdata)
{
int write_cmd = 0;
int timeout;
uint32_t temp32;
uint16_t temp16;
uint64_t opmenu;
int opcode_index;
/* Is it a write command? */
if ((op.spi_type == SPI_OPCODE_TYPE_WRITE_NO_ADDRESS)
|| (op.spi_type == SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS)) {
write_cmd = 1;
}
timeout = 100 * 60; /* 60 ms are 9.6 million cycles at 16 MHz. */
while ((REGREAD16(ICH7_REG_SPIS) & SPIS_SCIP) && --timeout) {
programmer_delay(10);
}
if (!timeout) {
msg_perr("Error: SCIP never cleared!\n");
return 1;
}
/* Program offset in flash into SPIA while preserving reserved bits. */
temp32 = REGREAD32(ICH7_REG_SPIA) & ~0x00FFFFFF;
REGWRITE32(ICH7_REG_SPIA, (offset & 0x00FFFFFF) | temp32);
/* Program data into SPID0 to N */
if (write_cmd && (datalength != 0))
ich_fill_data(data, datalength, ICH7_REG_SPID0);
/* Assemble SPIS */
temp16 = REGREAD16(ICH7_REG_SPIS);
/* keep reserved bits */
temp16 &= SPIS_RESERVED_MASK;
/* clear error status registers */
temp16 |= (SPIS_CDS | SPIS_FCERR);
REGWRITE16(ICH7_REG_SPIS, temp16);
/* Assemble SPIC */
temp16 = 0;
if (datalength != 0) {
temp16 |= SPIC_DS;
temp16 |= ((uint32_t) ((datalength - 1) & (maxdata - 1))) << 8;
}
/* Select opcode */
opmenu = REGREAD32(ICH7_REG_OPMENU);
opmenu |= ((uint64_t)REGREAD32(ICH7_REG_OPMENU + 4)) << 32;
for (opcode_index = 0; opcode_index < 8; opcode_index++) {
if ((opmenu & 0xff) == op.opcode) {
break;
}
opmenu >>= 8;
}
if (opcode_index == 8) {
msg_pdbg("Opcode %x not found.\n", op.opcode);
return 1;
}
temp16 |= ((uint16_t) (opcode_index & 0x07)) << 4;
timeout = 100 * 60; /* 60 ms are 9.6 million cycles at 16 MHz. */
/* Handle Atomic. Atomic commands include three steps:
- sending the preop (mainly EWSR or WREN)
- sending the main command
- waiting for the busy bit (WIP) to be cleared
This means the timeout must be sufficient for chip erase
of slow high-capacity chips.
*/
switch (op.atomic) {
case 2:
/* Select second preop. */
temp16 |= SPIC_SPOP;
/* And fall through. */
case 1:
/* Atomic command (preop+op) */
temp16 |= SPIC_ACS;
timeout = 100 * 1000 * 60; /* 60 seconds */
break;
}
/* Start */
temp16 |= SPIC_SCGO;
/* write it */
REGWRITE16(ICH7_REG_SPIC, temp16);
/* Wait for Cycle Done Status or Flash Cycle Error. */
while (((REGREAD16(ICH7_REG_SPIS) & (SPIS_CDS | SPIS_FCERR)) == 0) &&
--timeout) {
programmer_delay(10);
}
if (!timeout) {
msg_perr("timeout, ICH7_REG_SPIS=0x%04x\n",
REGREAD16(ICH7_REG_SPIS));
return 1;
}
/* FIXME: make sure we do not needlessly cause transaction errors. */
temp16 = REGREAD16(ICH7_REG_SPIS);
if (temp16 & SPIS_FCERR) {
msg_perr("Transaction error!\n");
/* keep reserved bits */
temp16 &= SPIS_RESERVED_MASK;
REGWRITE16(ICH7_REG_SPIS, temp16 | SPIS_FCERR);
return 1;
}
if ((!write_cmd) && (datalength != 0))
ich_read_data(data, datalength, ICH7_REG_SPID0);
return 0;
}
static int ich9_run_opcode(OPCODE op, uint32_t offset,
uint8_t datalength, uint8_t * data)
{
int write_cmd = 0;
int timeout;
uint32_t temp32;
uint64_t opmenu;
int opcode_index;
/* Is it a write command? */
if ((op.spi_type == SPI_OPCODE_TYPE_WRITE_NO_ADDRESS)
|| (op.spi_type == SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS)) {
write_cmd = 1;
}
timeout = 100 * 60; /* 60 ms are 9.6 million cycles at 16 MHz. */
while ((REGREAD8(ICH9_REG_SSFS) & SSFS_SCIP) && --timeout) {
programmer_delay(10);
}
if (!timeout) {
msg_perr("Error: SCIP never cleared!\n");
return 1;
}
/* Program offset in flash into FADDR while preserve the reserved bits
* and clearing the 25. address bit which is only useable in hwseq. */
temp32 = REGREAD32(ICH9_REG_FADDR) & ~0x01FFFFFF;
REGWRITE32(ICH9_REG_FADDR, (offset & 0x00FFFFFF) | temp32);
/* Program data into FDATA0 to N */
if (write_cmd && (datalength != 0))
ich_fill_data(data, datalength, ICH9_REG_FDATA0);
/* Assemble SSFS + SSFC */
temp32 = REGREAD32(ICH9_REG_SSFS);
/* Keep reserved bits only */
temp32 &= SSFS_RESERVED_MASK | SSFC_RESERVED_MASK;
/* Clear cycle done and cycle error status registers */
temp32 |= (SSFS_FDONE | SSFS_FCERR);
REGWRITE32(ICH9_REG_SSFS, temp32);
/* Use 20 MHz */
temp32 |= SSFC_SCF_20MHZ;
/* Set data byte count (DBC) and data cycle bit (DS) */
if (datalength != 0) {
uint32_t datatemp;
temp32 |= SSFC_DS;
datatemp = ((((uint32_t)datalength - 1) << SSFC_DBC_OFF) &
SSFC_DBC);
temp32 |= datatemp;
}
/* Select opcode */
opmenu = REGREAD32(ICH9_REG_OPMENU);
opmenu |= ((uint64_t)REGREAD32(ICH9_REG_OPMENU + 4)) << 32;
for (opcode_index = 0; opcode_index < 8; opcode_index++) {
if ((opmenu & 0xff) == op.opcode) {
break;
}
opmenu >>= 8;
}
if (opcode_index == 8) {
msg_pdbg("Opcode %x not found.\n", op.opcode);
return 1;
}
temp32 |= ((uint32_t) (opcode_index & 0x07)) << (8 + 4);
timeout = 100 * 60; /* 60 ms are 9.6 million cycles at 16 MHz. */
/* Handle Atomic. Atomic commands include three steps:
- sending the preop (mainly EWSR or WREN)
- sending the main command
- waiting for the busy bit (WIP) to be cleared
This means the timeout must be sufficient for chip erase
of slow high-capacity chips.
*/
switch (op.atomic) {
case 2:
/* Select second preop. */
temp32 |= SSFC_SPOP;
/* And fall through. */
case 1:
/* Atomic command (preop+op) */
temp32 |= SSFC_ACS;
timeout = 100 * 1000 * 60; /* 60 seconds */
break;
}
/* Start */
temp32 |= SSFC_SCGO;
/* write it */
REGWRITE32(ICH9_REG_SSFS, temp32);
/* Wait for Cycle Done Status or Flash Cycle Error. */
while (((REGREAD32(ICH9_REG_SSFS) & (SSFS_FDONE | SSFS_FCERR)) == 0) &&
--timeout) {
programmer_delay(10);
}
if (!timeout) {
msg_perr("timeout, ICH9_REG_SSFS=0x%08x\n",
REGREAD32(ICH9_REG_SSFS));
return 1;
}
/* FIXME make sure we do not needlessly cause transaction errors. */
temp32 = REGREAD32(ICH9_REG_SSFS);
if (temp32 & SSFS_FCERR) {
msg_perr("Transaction error!\n");
prettyprint_ich9_reg_ssfs(temp32);
prettyprint_ich9_reg_ssfc(temp32);
/* keep reserved bits */
temp32 &= SSFS_RESERVED_MASK | SSFC_RESERVED_MASK;
/* Clear the transaction error. */
REGWRITE32(ICH9_REG_SSFS, temp32 | SSFS_FCERR);
return 1;
}
if ((!write_cmd) && (datalength != 0))
ich_read_data(data, datalength, ICH9_REG_FDATA0);
return 0;
}
static int run_opcode(const struct flashctx *flash, OPCODE op, uint32_t offset,
uint8_t datalength, uint8_t * data)
{
/* max_data_read == max_data_write for all Intel/VIA SPI masters */
uint8_t maxlength = flash->mst->spi.max_data_read;
if (ich_generation == CHIPSET_ICH_UNKNOWN) {
msg_perr("%s: unsupported chipset\n", __func__);
return -1;
}
if (datalength > maxlength) {
msg_perr("%s: Internal command size error for "
"opcode 0x%02x, got datalength=%i, want <=%i\n",
__func__, op.opcode, datalength, maxlength);
return SPI_INVALID_LENGTH;
}
switch (ich_generation) {
case CHIPSET_ICH7:
case CHIPSET_TUNNEL_CREEK:
case CHIPSET_CENTERTON:
return ich7_run_opcode(op, offset, datalength, data, maxlength);
case CHIPSET_ICH8:
default: /* Future version might behave the same */
return ich9_run_opcode(op, offset, datalength, data);
}
}
static int ich_spi_send_command(struct flashctx *flash, unsigned int writecnt,
unsigned int readcnt,
const unsigned char *writearr,
unsigned char *readarr)
{
int result;
int opcode_index = -1;