Author: stepan
Date: 2008-06-27 18:28:34 +0200 (Fri, 27 Jun 2008)
New Revision: 3393
Modified:
trunk/util/flashrom/chipset_enable.c
trunk/util/flashrom/flash.h
trunk/util/flashrom/flashrom.c
trunk/util/flashrom/ichspi.c
trunk/util/flashrom/spi.c
Log:
* ICH7 SPI support
* fix some variable names in ichspi.c (Offset -> offset)
* Dump ICH7 SPI bar with -V
* Improve error message in case IOPL goes wrong. (It might not even be an IOPL)
Signed-off-by: Stefan Reinauer <stepan(a)coresystems.de>
Acked-by: Peter Stuge <peter(a)stuge.se>
Modified: trunk/util/flashrom/chipset_enable.c
===================================================================
--- trunk/util/flashrom/chipset_enable.c 2008-06-27 15:18:20 UTC (rev 3392)
+++ trunk/util/flashrom/chipset_enable.c 2008-06-27 16:28:34 UTC (rev 3393)
@@ -189,15 +189,16 @@
static int enable_flash_ich_dc_spi(struct pci_dev *dev, const char *name, unsigned long spibar)
{
- uint8_t old, new, bbs;
+ uint8_t old, new, bbs, buc;
uint32_t tmp, gcs;
void *rcrb;
/* Read the Root Complex Base Address Register (RCBA) */
tmp = pci_read_long(dev, 0xf0);
+
/* Calculate the Root Complex Register Block address */
tmp &= 0xffffc000;
- printf_debug("Root Complex Register Block address = 0x%x\n", tmp);
+ printf_debug("\nRoot Complex Register Block address = 0x%x\n", tmp);
rcrb = mmap(0, 0x4000, PROT_READ | PROT_WRITE, MAP_SHARED, fd_mem, (off_t)tmp);
if (rcrb == MAP_FAILED) {
perror("Can't mmap memory using " MEM_DEV);
@@ -212,11 +213,42 @@
printf_debug("BOOT BIOS Straps: 0x%x (%s)\n", bbs,
(bbs == 0x3) ? "LPC" : ((bbs == 0x2) ? "PCI" : "SPI"));
+ buc = *(volatile uint8_t *)(rcrb + 0x3414);
+ printf_debug("Top Swap : %s\n", (buc & 1)?"enabled (A16 inverted)":"not enabled");
+
/* SPIBAR is at RCRB+0x3020 for ICH[78] and RCRB+0x3800 for ICH9. */
- printf_debug("SPIBAR = 0x%lx\n", tmp + spibar);
- /* TODO: Dump the SPI config regs */
+ printf_debug("SPIBAR = 0x%x + 0x%04x\n", tmp, (uint16_t)spibar);
+
+ // Assign Virtual Address
ich_spibar = rcrb + spibar;
+ if (ich7_detected) {
+ int i;
+ printf_debug("0x00: 0x%04x (SPIS)\n", *(uint16_t *)(ich_spibar + 0));
+ printf_debug("0x02: 0x%04x (SPIC)\n", *(uint16_t *)(ich_spibar + 2));
+ printf_debug("0x04: 0x%08x (SPIA)\n", *(uint32_t *)(ich_spibar + 4));
+ for (i=0; i < 8; i++) {
+ int offs;
+ offs = 8 + (i * 8);
+ printf_debug("0x%02x: 0x%08x (SPID%d)\n", offs, *(uint32_t *)(ich_spibar + offs), i);
+ printf_debug("0x%02x: 0x%08x (SPID%d+4)\n", offs+4, *(uint32_t *)(ich_spibar + offs +4), i);
+ }
+ printf_debug("0x50: 0x%08x (BBAR)\n", *(uint32_t *)(ich_spibar + 0x50));
+ printf_debug("0x54: 0x%04x (PREOP)\n", *(uint16_t *)(ich_spibar + 0x54));
+ printf_debug("0x56: 0x%04x (OPTYPE)\n", *(uint16_t *)(ich_spibar + 0x56));
+ printf_debug("0x58: 0x%08x (OPMENU)\n", *(uint32_t *)(ich_spibar + 0x58));
+ printf_debug("0x5c: 0x%08x (OPMENU+4)\n", *(uint32_t *)(ich_spibar + 0x5c));
+ for (i=0; i < 4; i++) {
+ int offs;
+ offs = 0x60 + (i * 4);
+ printf_debug("0x%02x: 0x%08x (PBR%d)\n", offs, *(uint32_t *)(ich_spibar + offs), i);
+ }
+ printf_debug("\n");
+ if ( (*(uint16_t *)ich_spibar) & (1 << 15)) {
+ printf("WARNING: SPI Configuration Lockdown activated.\n");
+ }
+ }
+
old = pci_read_byte(dev, 0xdc);
printf_debug("SPI Read Configuration: ");
new = (old >> 2) & 0x3;
@@ -234,11 +266,16 @@
return enable_flash_ich_dc(dev, name);
}
+/* Flag for ICH7 SPI register block */
+int ich7_detected = 0;
+
static int enable_flash_ich7(struct pci_dev *dev, const char *name)
{
+ ich7_detected = 1;
return enable_flash_ich_dc_spi(dev, name, 0x3020);
}
+/* Flag for ICH8/ICH9 SPI register block */
int ich9_detected = 0;
static int enable_flash_ich8(struct pci_dev *dev, const char *name)
Modified: trunk/util/flashrom/flash.h
===================================================================
--- trunk/util/flashrom/flash.h 2008-06-27 15:18:20 UTC (rev 3392)
+++ trunk/util/flashrom/flash.h 2008-06-27 16:28:34 UTC (rev 3393)
@@ -370,6 +370,7 @@
/* chipset_enable.c */
int chipset_flash_enable(void);
void print_supported_chipsets(void);
+extern int ich7_detected;
extern int ich9_detected;
extern void *ich_spibar;
Modified: trunk/util/flashrom/flashrom.c
===================================================================
--- trunk/util/flashrom/flashrom.c 2008-06-27 15:18:20 UTC (rev 3392)
+++ trunk/util/flashrom/flashrom.c 2008-06-27 16:28:34 UTC (rev 3393)
@@ -378,7 +378,7 @@
#else
if (iopl(3) != 0) {
#endif
- fprintf(stderr, "ERROR: iopl failed: \"%s\"\n",
+ fprintf(stderr, "ERROR: Could not get IO privileges (%s).\nYou need to be root.\n",
strerror(errno));
exit(1);
}
Modified: trunk/util/flashrom/ichspi.c
===================================================================
--- trunk/util/flashrom/ichspi.c 2008-06-27 15:18:20 UTC (rev 3392)
+++ trunk/util/flashrom/ichspi.c 2008-06-27 16:28:34 UTC (rev 3393)
@@ -4,6 +4,7 @@
* Copyright (C) 2008 Stefan Wildemann <stefan.wildemann(a)kontron.com>
* Copyright (C) 2008 Claus Gindhart <claus.gindhart(a)kontron.com>
* Copyright (C) 2008 Dominik Geyer <dominik.geyer(a)kontron.com>
+ * Copyright (C) 2008 coresystems GmbH <info(a)coresystems.de>
*
* 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
@@ -42,15 +43,17 @@
#define MAXDATABYTES 0x40
-/*ICH9 controller register definition*/
-#define REG_FADDR 0x08 /* 32 Bits */
-#define REG_FDATA0 0x10 /* 64 Bytes */
-#define REG_SSFS 0x90 /* 08 Bits */
+/* ICH9 controller register definition */
+#define ICH9_REG_FADDR 0x08 /* 32 Bits */
+#define ICH9_REG_FDATA0 0x10 /* 64 Bytes */
+
+#define ICH9_REG_SSFS 0x90 /* 08 Bits */
#define SSFS_SCIP 0x00000001
#define SSFS_CDS 0x00000004
#define SSFS_FCERR 0x00000008
#define SSFS_AEL 0x00000010
-#define REG_SSFC 0x91 /* 24 Bits */
+
+#define ICH9_REG_SSFC 0x91 /* 24 Bits */
#define SSFC_SCGO 0x00000200
#define SSFC_ACS 0x00000400
#define SSFC_SPOP 0x00000800
@@ -61,16 +64,35 @@
#define SSFC_SCF 0x01000000
#define SSFC_SCF_20MHZ 0x00000000
#define SSFC_SCF_33MHZ 0x01000000
-#define REG_PREOP 0x94 /* 16 Bits */
-#define REG_OPTYPE 0x96 /* 16 Bits */
-#define REG_OPMENU 0x98 /* 64 BITS */
+#define ICH9_REG_PREOP 0x94 /* 16 Bits */
+#define ICH9_REG_OPTYPE 0x96 /* 16 Bits */
+#define ICH9_REG_OPMENU 0x98 /* 64 Bits */
+
// 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 0x00000001
+#define SPIS_CDS 0x00000004
+#define SPIS_FCERR 0x00000008
+
+#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 */
+
typedef struct _OPCODE {
uint8_t opcode; //This commands spi opcode
uint8_t spi_type; //This commands spi type
@@ -101,10 +123,17 @@
static inline uint32_t REGREAD32(int X)
{
volatile uint32_t regval;
- regval = *(volatile uint32_t *)((uint8_t *) ich_spibar + X);
+ regval = *(volatile uint32_t *) ((uint8_t *) ich_spibar + X);
return regval;
}
+static inline uint16_t REGREAD16(int X)
+{
+ volatile uint16_t regval;
+ regval = *(volatile uint16_t *) ((uint8_t *) ich_spibar + X);
+ return regval;
+}
+
#define REGWRITE32(X,Y) (*(uint32_t *)((uint8_t *)ich_spibar+X)=Y)
#define REGWRITE16(X,Y) (*(uint16_t *)((uint8_t *)ich_spibar+X)=Y)
#define REGWRITE8(X,Y) (*(uint8_t *)((uint8_t *)ich_spibar+X)=Y)
@@ -114,9 +143,9 @@
static int run_opcode(uint8_t nr, OPCODE op, uint32_t offset,
uint8_t datalength, uint8_t * data);
static int ich_spi_read_page(struct flashchip *flash, uint8_t * buf,
- int Offset);
+ int offset);
static int ich_spi_write_page(struct flashchip *flash, uint8_t * bytes,
- int Offset);
+ int offset);
static int ich_spi_erase_block(struct flashchip *flash, int offset);
OPCODES O_ST_M25P = {
@@ -147,37 +176,61 @@
temp16 = (op->preop[0]);
/* 8:16 Prefix Opcode 2 */
temp16 |= ((uint16_t) op->preop[1]) << 8;
- REGWRITE16(REG_PREOP, temp16);
+ if (ich7_detected) {
+ REGWRITE16(ICH7_REG_PREOP, temp16);
+ } else if (ich9_detected) {
+ REGWRITE16(ICH9_REG_PREOP, temp16);
+ }
- /*Program Opcode Types 0 - 7 */
+ /* Program Opcode Types 0 - 7 */
temp16 = 0;
for (a = 0; a < 8; a++) {
temp16 |= ((uint16_t) op->opcode[a].spi_type) << (a * 2);
}
- REGWRITE16(REG_OPTYPE, temp16);
- /*Program Allowable Opcodes 0 - 3 */
+ if (ich7_detected) {
+ REGWRITE16(ICH7_REG_OPTYPE, temp16);
+ } else if (ich9_detected) {
+ REGWRITE16(ICH9_REG_OPTYPE, temp16);
+ }
+
+
+ /* Program Allowable Opcodes 0 - 3 */
temp32 = 0;
for (a = 0; a < 4; a++) {
temp32 |= ((uint32_t) op->opcode[a].opcode) << (a * 8);
}
- REGWRITE32(REG_OPMENU, temp32);
+ if (ich7_detected) {
+ REGWRITE32(ICH7_REG_OPMENU, temp32);
+ } else if (ich9_detected) {
+ REGWRITE32(ICH9_REG_OPMENU, temp32);
+ }
+
+
/*Program Allowable Opcodes 4 - 7 */
temp32 = 0;
for (a = 4; a < 8; a++) {
- temp32 |= ((uint32_t) op->opcode[a].opcode) << ((a - 4) * 8);
+ temp32 |=
+ ((uint32_t) op->opcode[a].opcode) << ((a - 4) * 8);
}
- REGWRITE32(REG_OPMENU + 4, temp32);
+ if (ich7_detected) {
+ REGWRITE32(ICH7_REG_OPMENU + 4, temp32);
+ } else if (ich9_detected) {
+ REGWRITE32(ICH9_REG_OPMENU + 4, temp32);
+ }
+
return 0;
}
-int run_opcode(uint8_t nr, OPCODE op, uint32_t offset, uint8_t datalength,
- uint8_t * data)
+static int ich7_run_opcode(uint8_t nr, OPCODE op, uint32_t offset,
+ uint8_t datalength, uint8_t * data)
{
int write_cmd = 0;
+ int timeout;
uint32_t temp32;
+ uint16_t temp16;
uint32_t a;
/* Is it a write command? */
@@ -187,7 +240,7 @@
}
/* Programm Offset in Flash into FADDR */
- REGWRITE32(REG_FADDR, (offset & 0x00FFFFFF)); /*SPI addresses are 24 BIT only */
+ REGWRITE32(ICH7_REG_SPIA, (offset & 0x00FFFFFF)); /* SPI addresses are 24 BIT only */
/* Program data into FDATA0 to N */
if (write_cmd && (datalength != 0)) {
@@ -200,16 +253,119 @@
temp32 |= ((uint32_t) data[a]) << ((a % 4) * 8);
if ((a % 4) == 3) {
- REGWRITE32(REG_FDATA0 + (a - (a % 4)), temp32);
+ REGWRITE32(ICH7_REG_SPID0 + (a - (a % 4)),
+ temp32);
}
}
if (((a - 1) % 4) != 3) {
- REGWRITE32(REG_FDATA0 + ((a - 1) - ((a - 1) % 4)),
- temp32);
+ REGWRITE32(ICH7_REG_SPID0 +
+ ((a - 1) - ((a - 1) % 4)), temp32);
}
}
+ /* Assemble SPIS */
+ temp16 = 0;
+ /* 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 |= ((uint16_t) ((datalength - 1) & 0x3f)) << 8;
+ }
+
+ /* Select opcode */
+ temp16 |= ((uint16_t) (nr & 0x07)) << 4;
+
+ /* Handle Atomic */
+ if (op.atomic != 0) {
+ /* Select atomic command */
+ temp16 |= SPIC_ACS;
+ /* Selct prefix opcode */
+ if ((op.atomic - 1) == 1) {
+ /*Select prefix opcode 2 */
+ temp16 |= SPIC_SPOP;
+ }
+ }
+
+ /* Start */
+ temp16 |= SPIC_SCGO;
+
+ /* write it */
+ REGWRITE16(ICH7_REG_SPIC, temp16);
+
+ /* wait for cycle complete */
+ timeout = 1000 * 60; // 60s is a looong timeout.
+ while (((REGREAD16(ICH7_REG_SPIS) & SPIS_CDS) == 0) && --timeout) {
+ myusec_delay(1000);
+ }
+ if (!timeout) {
+ printf_debug("timeout\n");
+ }
+
+ if ((REGREAD16(ICH7_REG_SPIS) & SPIS_FCERR) != 0) {
+ printf_debug("Transaction error!\n");
+ return 1;
+ }
+
+ if ((!write_cmd) && (datalength != 0)) {
+ for (a = 0; a < datalength; a++) {
+ if ((a % 4) == 0) {
+ temp32 = REGREAD32(ICH7_REG_SPID0 + (a));
+ }
+
+ data[a] =
+ (temp32 & (((uint32_t) 0xff) << ((a % 4) * 8)))
+ >> ((a % 4) * 8);
+ }
+ }
+
+ return 0;
+}
+
+
+static int ich9_run_opcode(uint8_t nr, OPCODE op, uint32_t offset,
+ uint8_t datalength, uint8_t * data)
+{
+ int write_cmd = 0;
+ uint32_t temp32;
+ uint32_t a;
+
+ /* 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;
+ }
+
+ /* Programm Offset in Flash into FADDR */
+ REGWRITE32(ICH9_REG_FADDR, (offset & 0x00FFFFFF)); /* SPI addresses are 24 BIT only */
+
+ /* Program data into FDATA0 to N */
+ if (write_cmd && (datalength != 0)) {
+ temp32 = 0;
+ for (a = 0; a < datalength; a++) {
+ if ((a % 4) == 0) {
+ temp32 = 0;
+ }
+
+ temp32 |= ((uint32_t) data[a]) << ((a % 4) * 8);
+
+ if ((a % 4) == 3) {
+ REGWRITE32(ICH9_REG_FDATA0 + (a - (a % 4)),
+ temp32);
+ }
+ }
+ if (((a - 1) % 4) != 3) {
+ REGWRITE32(ICH9_REG_FDATA0 +
+ ((a - 1) - ((a - 1) % 4)), temp32);
+ }
+
+ }
+
/* Assemble SSFS + SSFC */
temp32 = 0;
@@ -243,15 +399,15 @@
temp32 |= SSFC_SCGO;
/* write it */
- REGWRITE32(REG_SSFS, temp32);
+ REGWRITE32(ICH9_REG_SSFS, temp32);
/*wait for cycle complete */
- while ((REGREAD32(REG_SSFS) & SSFS_CDS) == 0) {
+ while ((REGREAD32(ICH9_REG_SSFS) & SSFS_CDS) == 0) {
/*TODO; Do something that this can't lead into an endless loop. but some
* commands may cause this to be last more than 30 seconds */
}
- if ((REGREAD32(REG_SSFS) & SSFS_FCERR) != 0) {
+ if ((REGREAD32(ICH9_REG_SSFS) & SSFS_FCERR) != 0) {
printf_debug("Transaction error!\n");
return 1;
}
@@ -259,21 +415,35 @@
if ((!write_cmd) && (datalength != 0)) {
for (a = 0; a < datalength; a++) {
if ((a % 4) == 0) {
- temp32 = REGREAD32(REG_FDATA0 + (a));
+ temp32 = REGREAD32(ICH9_REG_FDATA0 + (a));
}
data[a] =
- (temp32 & (((uint32_t) 0xff) << ((a % 4) * 8))) >>
- ((a % 4) * 8);
+ (temp32 & (((uint32_t) 0xff) << ((a % 4) * 8)))
+ >> ((a % 4) * 8);
}
}
return 0;
}
+static int run_opcode(uint8_t nr, OPCODE op, uint32_t offset,
+ uint8_t datalength, uint8_t * data)
+{
+ if (ich7_detected)
+ return ich7_run_opcode(nr, op, offset, datalength, data);
+ else if (ich9_detected) {
+ return ich9_run_opcode(nr, op, offset, datalength, data);
+ }
+
+ /* If we ever get here, something really weird happened */
+ return -1;
+}
+
static int ich_spi_erase_block(struct flashchip *flash, int offset)
{
- printf_debug("Spi_Erase,Offset=%d,sectors=%d\n", offset, 1);
+ printf_debug("ich_spi_erase_block: offset=%d, sectors=%d\n",
+ offset, 1);
if (run_opcode(2, curopcodes->opcode[2], offset, 0, NULL) != 0) {
printf_debug("Error erasing sector at 0x%x", offset);
@@ -285,21 +455,21 @@
return 0;
}
-static int ich_spi_read_page(struct flashchip *flash, uint8_t * buf, int Offset)
+static int ich_spi_read_page(struct flashchip *flash, uint8_t * buf, int offset)
{
int page_size = flash->page_size;
uint32_t remaining = flash->page_size;
int a;
- printf_debug("Spi_Read,Offset=%d,number=%d,buf=%p\n", Offset, page_size,
- buf);
+ printf_debug("ich_spi_read_page: offset=%d, number=%d, buf=%p\n",
+ offset, page_size, buf);
for (a = 0; a < page_size; a += MAXDATABYTES) {
if (remaining < MAXDATABYTES) {
if (run_opcode
(1, curopcodes->opcode[1],
- Offset + (page_size - remaining), remaining,
+ offset + (page_size - remaining), remaining,
&buf[page_size - remaining]) != 0) {
printf_debug("Error reading");
return 1;
@@ -308,7 +478,7 @@
} else {
if (run_opcode
(1, curopcodes->opcode[1],
- Offset + (page_size - remaining), MAXDATABYTES,
+ offset + (page_size - remaining), MAXDATABYTES,
&buf[page_size - remaining]) != 0) {
printf_debug("Error reading");
return 1;
@@ -321,20 +491,20 @@
}
static int ich_spi_write_page(struct flashchip *flash, uint8_t * bytes,
- int Offset)
+ int offset)
{
int page_size = flash->page_size;
uint32_t remaining = page_size;
int a;
- printf_debug("write_page_ichspi,Offset=%d,number=%d,buf=%p\n", Offset,
- page_size, bytes);
+ printf_debug("ich_spi_write_page: offset=%d, number=%d, buf=%p\n",
+ offset, page_size, bytes);
for (a = 0; a < page_size; a += MAXDATABYTES) {
if (remaining < MAXDATABYTES) {
if (run_opcode
(0, curopcodes->opcode[0],
- Offset + (page_size - remaining), remaining,
+ offset + (page_size - remaining), remaining,
&bytes[page_size - remaining]) != 0) {
printf_debug("Error writing");
return 1;
@@ -343,7 +513,7 @@
} else {
if (run_opcode
(0, curopcodes->opcode[0],
- Offset + (page_size - remaining), MAXDATABYTES,
+ offset + (page_size - remaining), MAXDATABYTES,
&bytes[page_size - remaining]) != 0) {
printf_debug("Error writing");
return 1;
Modified: trunk/util/flashrom/spi.c
===================================================================
--- trunk/util/flashrom/spi.c 2008-06-27 15:18:20 UTC (rev 3392)
+++ trunk/util/flashrom/spi.c 2008-06-27 16:28:34 UTC (rev 3393)
@@ -2,6 +2,7 @@
* This file is part of the flashrom project.
*
* Copyright (C) 2007, 2008 Carl-Daniel Hailfinger
+ * Copyright (C) 2008 coresystems GmbH
*
* 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
@@ -35,6 +36,8 @@
{
if (it8716f_flashport)
return it8716f_spi_command(writecnt, readcnt, writearr, readarr);
+ else if (ich7_detected)
+ return ich_spi_command(writecnt, readcnt, writearr, readarr);
else if (ich9_detected)
return ich_spi_command(writecnt, readcnt, writearr, readarr);
printf_debug("%s called, but no SPI chipset detected\n", __FUNCTION__);
@@ -357,6 +360,8 @@
{
if (it8716f_flashport)
return it8716f_spi_chip_read(flash, buf);
+ else if (ich7_detected)
+ return ich_spi_read(flash, buf);
else if (ich9_detected)
return ich_spi_read(flash, buf);
printf_debug("%s called, but no SPI chipset detected\n", __FUNCTION__);
@@ -367,6 +372,8 @@
{
if (it8716f_flashport)
return it8716f_spi_chip_write(flash, buf);
+ else if (ich7_detected)
+ return ich_spi_write(flash, buf);
else if (ich9_detected)
return ich_spi_write(flash, buf);
printf_debug("%s called, but no SPI chipset detected\n", __FUNCTION__);
