Various coding style fixes, constification, fixed typos
Also, s/0xFF80/0xFFC0/ in the Acorp 6A815EPD board-enable, as per
http://www.linuxbios.org/pipermail/linuxbios/2007-December/027750.html
Corresponding to flashrom svn r162 and coreboot v2 svn r2997.
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
diff --git a/chipset_enable.c b/chipset_enable.c
index 87929f5..7eecf09 100644
--- a/chipset_enable.c
+++ b/chipset_enable.c
@@ -34,12 +34,14 @@
#include <unistd.h>
#include "flash.h"
-static int enable_flash_ali_m1533(struct pci_dev *dev, char *name)
+static int enable_flash_ali_m1533(struct pci_dev *dev, const char *name)
{
uint8_t tmp;
- /* ROM Write enable, 0xFFFC0000-0xFFFDFFFF and
- 0xFFFE0000-0xFFFFFFFF ROM select enable. */
+ /*
+ * ROM Write enable, 0xFFFC0000-0xFFFDFFFF and
+ * 0xFFFE0000-0xFFFFFFFF ROM select enable.
+ */
tmp = pci_read_byte(dev, 0x47);
tmp |= 0x46;
pci_write_byte(dev, 0x47, tmp);
@@ -47,24 +49,28 @@
return 0;
}
-static int enable_flash_sis630(struct pci_dev *dev, char *name)
+static int enable_flash_sis630(struct pci_dev *dev, const char *name)
{
- char b;
+ uint8_t b;
- /* Enable 0xFFF8000~0xFFFF0000 decoding on SiS 540/630 */
+ /* Enable 0xFFF8000~0xFFFF0000 decoding on SiS 540/630. */
b = pci_read_byte(dev, 0x40);
pci_write_byte(dev, 0x40, b | 0xb);
- /* Flash write enable on SiS 540/630 */
+
+ /* Flash write enable on SiS 540/630. */
b = pci_read_byte(dev, 0x45);
pci_write_byte(dev, 0x45, b | 0x40);
- /* The same thing on SiS 950 SuperIO side */
+ /* The same thing on SiS 950 Super I/O side... */
+
+ /* First probe for Super I/O on config port 0x2e. */
outb(0x87, 0x2e);
outb(0x01, 0x2e);
outb(0x55, 0x2e);
outb(0x55, 0x2e);
if (inb(0x2f) != 0x87) {
+ /* If that failed, try config port 0x4e. */
outb(0x87, 0x4e);
outb(0x01, 0x4e);
outb(0x55, 0x4e);
@@ -99,7 +105,7 @@
* - PDF: http://www.intel.com/design/intarch/datashts/29056201.pdf
* - Order Number: 290562-001
*/
-static int enable_flash_piix4(struct pci_dev *dev, char *name)
+static int enable_flash_piix4(struct pci_dev *dev, const char *name)
{
uint16_t old, new;
uint16_t xbcs = 0x4e; /* X-Bus Chip Select register. */
@@ -132,23 +138,19 @@
return 0;
}
-static int enable_flash_ich(struct pci_dev *dev, char *name, int bios_cntl)
+/*
+ * See ie. page 375 of "Intel ICH7 External Design Specification"
+ * http://download.intel.com/design/chipsets/datashts/30701302.pdf
+ */
+static int enable_flash_ich(struct pci_dev *dev, const char *name,
+ int bios_cntl)
{
- /* register 4e.b gets or'ed with one */
uint8_t old, new;
- /* if it fails, it fails. There are so many variations of broken mobos
- * that it is hard to argue that we should quit at this point.
- */
-
- /* Note: the ICH0-ICH5 BIOS_CNTL register is actually 16 bit wide, but
+ /*
+ * Note: the ICH0-ICH5 BIOS_CNTL register is actually 16 bit wide, but
* just treating it as 8 bit wide seems to work fine in practice.
*/
-
- /* see ie. page 375 of "Intel ICH7 External Design Specification"
- * http://download.intel.com/design/chipsets/datashts/30701302.pdf
- */
-
old = pci_read_byte(dev, bios_cntl);
new = old | 1;
@@ -166,17 +168,17 @@
return 0;
}
-static int enable_flash_ich_4e(struct pci_dev *dev, char *name)
+static int enable_flash_ich_4e(struct pci_dev *dev, const char *name)
{
return enable_flash_ich(dev, name, 0x4e);
}
-static int enable_flash_ich_dc(struct pci_dev *dev, char *name)
+static int enable_flash_ich_dc(struct pci_dev *dev, const char *name)
{
return enable_flash_ich(dev, name, 0xdc);
}
-static int enable_flash_vt823x(struct pci_dev *dev, char *name)
+static int enable_flash_vt823x(struct pci_dev *dev, const char *name)
{
uint8_t val;
@@ -194,7 +196,7 @@
return 0;
}
-static int enable_flash_cs5530(struct pci_dev *dev, char *name)
+static int enable_flash_cs5530(struct pci_dev *dev, const char *name)
{
uint8_t reg8;
@@ -224,7 +226,7 @@
return 0;
}
-static int enable_flash_cs5536(struct pci_dev *dev, char *name)
+static int enable_flash_cs5536(struct pci_dev *dev, const char *name)
{
int fd_msr;
unsigned char buf[8];
@@ -233,15 +235,15 @@
/* Geode systems write protect the BIOS via RCONFs (cache
* settings similar to MTRRs). To unlock, change MSR 0x1808
* top byte to 0x22. Reading and writing to msr, however
- * requires instrucitons rdmsr/wrmsr, which are ring0 privileged
+ * requires instructions rdmsr/wrmsr, which are ring0 privileged
* instructions so only the kernel can do the read/write. This
* function, therefore, requires that the msr kernel module be
* loaded to access these instructions from user space using
* device /dev/cpu/0/msr. This hard-coded driver location
* could have potential problems on SMP machines since it
- * assumes cpu0, but it is safe on the geode which is not SMP.
+ * assumes cpu0, but it is safe on the Geode which is not SMP.
*
- * This is probably not portable beyond linux.
+ * This is probably not portable beyond Linux.
*/
fd_msr = open("/dev/cpu/0/msr", O_RDONLY);
@@ -272,7 +274,7 @@
return 0;
}
-static int enable_flash_sc1100(struct pci_dev *dev, char *name)
+static int enable_flash_sc1100(struct pci_dev *dev, const char *name)
{
uint8_t new;
@@ -288,16 +290,14 @@
return 0;
}
-static int enable_flash_sis5595(struct pci_dev *dev, char *name)
+static int enable_flash_sis5595(struct pci_dev *dev, const char *name)
{
uint8_t new, newer;
new = pci_read_byte(dev, 0x45);
- /* clear bit 5 */
- new &= (~0x20);
- /* set bit 2 */
- new |= 0x4;
+ new &= (~0x20); /* Clear bit 5. */
+ new |= 0x4; /* Set bit 2. */
pci_write_byte(dev, 0x45, new);
@@ -311,16 +311,11 @@
return 0;
}
-static int enable_flash_amd8111(struct pci_dev *dev, char *name)
+static int enable_flash_amd8111(struct pci_dev *dev, const char *name)
{
- /* register 4e.b gets or'ed with one */
uint8_t old, new;
- /* if it fails, it fails. There are so many variations of broken mobos
- * that it is hard to argue that we should quit at this point.
- */
-
- /* enable decoding at 0xffb00000 to 0xffffffff */
+ /* Enable decoding at 0xffb00000 to 0xffffffff. */
old = pci_read_byte(dev, 0x43);
new = old | 0xC0;
if (new != old) {
@@ -344,17 +339,10 @@
return 0;
}
-static int enable_flash_ck804(struct pci_dev *dev, char *name)
+static int enable_flash_ck804(struct pci_dev *dev, const char *name)
{
- /* register 4e.b gets or'ed with one */
uint8_t old, new;
- /* if it fails, it fails. There are so many variations of broken mobos
- * that it is hard to argue that we should quit at this point.
- */
-
- /* dump_pci_device(dev); */
-
old = pci_read_byte(dev, 0x88);
new = old | 0xc0;
if (new != old) {
@@ -378,14 +366,14 @@
return 0;
}
-static int enable_flash_sb400(struct pci_dev *dev, char *name)
+/* ATI Technologies Inc IXP SB400 PCI-ISA Bridge (rev 80) */
+static int enable_flash_sb400(struct pci_dev *dev, const char *name)
{
uint8_t tmp;
-
struct pci_filter f;
struct pci_dev *smbusdev;
- /* then look for the smbus device */
+ /* Look for the SMBus device. */
pci_filter_init((struct pci_access *)0, &f);
f.vendor = 0x1002;
f.device = 0x4372;
@@ -397,21 +385,21 @@
}
if (!smbusdev) {
- fprintf(stderr, "ERROR: SMBus device not found. aborting\n");
+ fprintf(stderr, "ERROR: SMBus device not found. Aborting.\n");
exit(1);
}
- /* enable some smbus stuff */
+ /* Enable some SMBus stuff. */
tmp = pci_read_byte(smbusdev, 0x79);
tmp |= 0x01;
pci_write_byte(smbusdev, 0x79, tmp);
- /* change southbridge */
+ /* Change southbridge. */
tmp = pci_read_byte(dev, 0x48);
tmp |= 0x21;
pci_write_byte(dev, 0x48, tmp);
- /* now become a bit silly. */
+ /* Now become a bit silly. */
tmp = inb(0xc6f);
outb(tmp, 0xeb);
outb(tmp, 0xeb);
@@ -423,19 +411,12 @@
return 0;
}
-static int enable_flash_mcp55(struct pci_dev *dev, char *name)
+static int enable_flash_mcp55(struct pci_dev *dev, const char *name)
{
- /* register 4e.b gets or'ed with one */
- unsigned char old, new, byte;
- unsigned short word;
+ uint8_t old, new, byte;
+ uint16_t word;
- /* if it fails, it fails. There are so many variations of broken mobos
- * that it is hard to argue that we should quit at this point.
- */
-
- /* dump_pci_device(dev); */
-
- /* Set the 0-16 MB enable bits */
+ /* Set the 0-16 MB enable bits. */
byte = pci_read_byte(dev, 0x88);
byte |= 0xff; /* 256K */
pci_write_byte(dev, 0x88, byte);
@@ -462,7 +443,7 @@
return 0;
}
-static int enable_flash_ht1000(struct pci_dev *dev, char *name)
+static int enable_flash_ht1000(struct pci_dev *dev, const char *name)
{
uint8_t byte;
@@ -479,12 +460,12 @@
}
typedef struct penable {
- unsigned short vendor, device;
- char *name;
- int (*doit) (struct pci_dev * dev, char *name);
+ uint16_t vendor, device;
+ const char *name;
+ int (*doit) (struct pci_dev *dev, const char *name);
} FLASH_ENABLE;
-static FLASH_ENABLE enables[] = {
+static const FLASH_ENABLE enables[] = {
{0x1039, 0x0630, "SIS630", enable_flash_sis630},
{0x8086, 0x7110, "PIIX4/PIIX4E/PIIX4M", enable_flash_piix4},
{0x8086, 0x7198, "Intel 440MX", enable_flash_piix4},
@@ -517,17 +498,14 @@
{0x1022, 0x2080, "AMD GEODE CS5536", enable_flash_cs5536},
{0x1022, 0x7468, "AMD8111", enable_flash_amd8111},
{0x10B9, 0x1533, "ALi M1533", enable_flash_ali_m1533},
- /* this fallthrough looks broken. */
{0x10de, 0x0050, "NVIDIA CK804", enable_flash_ck804}, /* LPC */
{0x10de, 0x0051, "NVIDIA CK804", enable_flash_ck804}, /* Pro */
{0x10de, 0x00d3, "NVIDIA CK804", enable_flash_ck804}, /* Slave, should not be here, to fix known bug for A01. */
-
{0x10de, 0x0260, "NVidia MCP51", enable_flash_ck804},
{0x10de, 0x0261, "NVidia MCP51", enable_flash_ck804},
{0x10de, 0x0262, "NVidia MCP51", enable_flash_ck804},
{0x10de, 0x0263, "NVidia MCP51", enable_flash_ck804},
-
- {0x10de, 0x0360, "NVIDIA MCP55", enable_flash_mcp55}, /* Gigabyte m57sli-s4 */
+ {0x10de, 0x0360, "NVIDIA MCP55", enable_flash_mcp55}, /* M57SLI-S4 */
{0x10de, 0x0361, "NVIDIA MCP55", enable_flash_mcp55}, /* LPC */
{0x10de, 0x0362, "NVIDIA MCP55", enable_flash_mcp55}, /* LPC */
{0x10de, 0x0363, "NVIDIA MCP55", enable_flash_mcp55}, /* LPC */
@@ -535,19 +513,18 @@
{0x10de, 0x0365, "NVIDIA MCP55", enable_flash_mcp55}, /* LPC */
{0x10de, 0x0366, "NVIDIA MCP55", enable_flash_mcp55}, /* LPC */
{0x10de, 0x0367, "NVIDIA MCP55", enable_flash_mcp55}, /* Pro */
-
- {0x1002, 0x4377, "ATI SB400", enable_flash_sb400}, /* ATI Technologies Inc IXP SB400 PCI-ISA Bridge (rev 80) */
-
+ {0x1002, 0x4377, "ATI SB400", enable_flash_sb400},
{0x1166, 0x0205, "Broadcom HT-1000", enable_flash_ht1000},
};
int chipset_flash_enable(void)
{
struct pci_dev *dev = 0;
- int ret = -2; /* nothing! */
+ int ret = -2; /* Nothing! */
int i;
- /* now let's try to find the chipset we have ... */
+ /* Now let's try to find the chipset we have... */
+ /* TODO: Use ARRAY_SIZE. */
for (i = 0; i < sizeof(enables) / sizeof(enables[0]); i++) {
dev = pci_dev_find(enables[i].vendor, enables[i].device);
if (dev)