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>

3 files changed, 122 insertions, 140 deletions

diff --git a/board_enable.c b/board_enable.c
index 13c4f1f5..2610a535 100644
--- a/board_enable.c
+++ b/board_enable.c
@@ -50,13 +50,13 @@ static void w836xx_ext_leave(uint16_t port)
 static unsigned char wbsio_read(uint16_t index, uint8_t reg)
 {
 	outb(reg, index);
-	return inb(index+1);
+	return inb(index + 1);
 }
 
 static void wbsio_write(uint16_t index, uint8_t reg, uint8_t data)
 {
 	outb(reg, index);
-	outb(data, index+1);
+	outb(data, index + 1);
 }
 
 static void wbsio_mask(uint16_t index, uint8_t reg, uint8_t data, uint8_t mask)
@@ -64,8 +64,8 @@ static void wbsio_mask(uint16_t index, uint8_t reg, uint8_t data, uint8_t mask)
 	uint8_t tmp;
 
 	outb(reg, index);
-	tmp = inb(index+1) & ~mask;
-	outb(tmp | (data & mask), index+1);
+	tmp = inb(index + 1) & ~mask;
+	outb(tmp | (data & mask), index + 1);
 }
 
 /**
@@ -79,8 +79,8 @@ static int w83627hf_gpio24_raise(uint16_t index, const char *name)
 {
 	w836xx_ext_enter(index);
 
-	/* Is this the w83627hf? */
-	if (wbsio_read(index, 0x20) != 0x52) {	/* Super I/O device ID register */
+	/* Is this the W83627HF? */
+	if (wbsio_read(index, 0x20) != 0x52) {	/* Super I/O device ID reg. */
 		fprintf(stderr, "\nERROR: %s: W83627HF: Wrong ID: 0x%02X.\n",
 			name, wbsio_read(index, 0x20));
 		w836xx_ext_leave(index);
@@ -90,14 +90,12 @@ static int w83627hf_gpio24_raise(uint16_t index, const char *name)
 	/* PIN89S: WDTO/GP24 multiplex -> GPIO24 */
 	wbsio_mask(index, 0x2B, 0x10, 0x10);
 
-	wbsio_write(index, 0x07, 0x08);	/* Select logical device 8: GPIO port 2 */
+	/* Select logical device 8: GPIO port 2 */
+	wbsio_write(index, 0x07, 0x08);
 
 	wbsio_mask(index, 0x30, 0x01, 0x01);	/* Activate logical device. */
-
 	wbsio_mask(index, 0xF0, 0x00, 0x10);	/* GPIO24 -> output */
-
 	wbsio_mask(index, 0xF2, 0x00, 0x10);	/* Clear GPIO24 inversion */
-
 	wbsio_mask(index, 0xF1, 0x10, 0x10);	/* Raise GPIO24 */
 
 	w836xx_ext_leave(index);
@@ -107,6 +105,7 @@ static int w83627hf_gpio24_raise(uint16_t index, const char *name)
 
 static int w83627hf_gpio24_raise_2e(const char *name)
 {
+	/* TODO: Typo? Shouldn't this be 0x2e? */
 	return w83627hf_gpio24_raise(0x2d, name);
 }
 
@@ -119,8 +118,9 @@ static int w83627hf_gpio24_raise_2e(const char *name)
 static int w83627thf_gpio4_4_raise(uint16_t index, const char *name)
 {
 	w836xx_ext_enter(index);
-	/* Is this the w83627thf? */
-	if (wbsio_read(index, 0x20) != 0x82) {	/* Super I/O device ID register */
+
+	/* Is this the W83627THF? */
+	if (wbsio_read(index, 0x20) != 0x82) {	/* Super I/O device ID reg. */
 		fprintf(stderr, "\nERROR: %s: W83627THF: Wrong ID: 0x%02X.\n",
 			name, wbsio_read(index, 0x20));
 		w836xx_ext_leave(index);
@@ -129,15 +129,11 @@ static int w83627thf_gpio4_4_raise(uint16_t index, const char *name)
 
 	/* PINxxxxS: GPIO4/bit 4 multiplex -> GPIOXXX */
 
-	wbsio_write(index, 0x07, 0x09);	/* Select logical device 9: GPIO port 4 */
-
-	wbsio_mask(index, 0x30, 0x02, 0x02);	/* Activate logical device. */
-
-	wbsio_mask(index, 0xF4, 0x00, 0x10);	/* GPIO4 bit 4 -> output */
-
-	wbsio_mask(index, 0xF6, 0x00, 0x10);	/* Clear GPIO4 bit 4 inversion */
-
-	wbsio_mask(index, 0xF5, 0x10, 0x10);	/* Raise GPIO4 bit 4 */
+	wbsio_write(index, 0x07, 0x09);      /* Select LDN 9: GPIO port 4 */
+	wbsio_mask(index, 0x30, 0x02, 0x02); /* Activate logical device. */
+	wbsio_mask(index, 0xF4, 0x00, 0x10); /* GPIO4 bit 4 -> output */
+	wbsio_mask(index, 0xF6, 0x00, 0x10); /* Clear GPIO4 bit 4 inversion */
+	wbsio_mask(index, 0xF5, 0x10, 0x10); /* Raise GPIO4 bit 4 */
 
 	w836xx_ext_leave(index);
 
@@ -146,8 +142,9 @@ static int w83627thf_gpio4_4_raise(uint16_t index, const char *name)
 
 static int w83627thf_gpio4_4_raise_4e(const char *name)
 {
-	return w83627thf_gpio4_4_raise(0x4E, name);
+	return w83627thf_gpio4_4_raise(0x4e, name);
 }
+
 /**
  * Suited for VIAs EPIA M and MII, and maybe other CLE266 based EPIAs.
  *
@@ -156,7 +153,7 @@ static int w83627thf_gpio4_4_raise_4e(const char *name)
 static int board_via_epia_m(const char *name)
 {
 	struct pci_dev *dev;
-	unsigned int base;
+	uint16_t base;
 	uint8_t val;
 
 	dev = pci_dev_find(0x1106, 0x3177);	/* VT8235 ISA bridge */
@@ -173,7 +170,7 @@ static int board_via_epia_m(const char *name)
 	/* Get Power Management IO address. */
 	base = pci_read_word(dev, 0x88) & 0xFF80;
 
-	/* enable GPIO15 which is connected to write protect. */
+	/* Enable GPIO15 which is connected to write protect. */
 	val = inb(base + 0x4D);
 	val |= 0x80;
 	outb(val, base + 0x4D);
@@ -199,16 +196,16 @@ static int board_asus_a7v8x_mx(const char *name)
 		return -1;
 	}
 
-	/* This bit is marked reserved actually */
+	/* This bit is marked reserved actually. */
 	val = pci_read_byte(dev, 0x59);
 	val &= 0x7F;
 	pci_write_byte(dev, 0x59, val);
 
-	/* Raise ROM MEMW# line on Winbond w83697 SuperIO */
+	/* Raise ROM MEMW# line on Winbond W83697 Super I/O. */
 	w836xx_ext_enter(0x2E);
 
-	if (!(wbsio_read(0x2E, 0x24) & 0x02))	/* flash rom enabled? */
-		wbsio_mask(0x2E, 0x24, 0x08, 0x08);	/* enable MEMW# */
+	if (!(wbsio_read(0x2E, 0x24) & 0x02))	/* Flash ROM enabled? */
+		wbsio_mask(0x2E, 0x24, 0x08, 0x08);	/* Enable MEMW#. */
 
 	w836xx_ext_leave(0x2E);
 
@@ -323,7 +320,7 @@ static int board_epox_ep_bx3(const char *name)
 }
 
 /**
- * Suited for Acorp 6A815EPD
+ * Suited for Acorp 6A815EPD.
  */
 static int board_acorp_6a815epd(const char *name)
 {
@@ -338,7 +335,7 @@ static int board_acorp_6a815epd(const char *name)
 	}
 
 	/* Use GPIOBASE register to find where the GPIO is mapped. */
-	port = (pci_read_word(dev, 0x58) & 0xFF80) + 0xE;
+	port = (pci_read_word(dev, 0x58) & 0xFFC0) + 0xE;
 
 	val = inb(port);
 	val |= 0x80; /* Top Block Lock -- pin 8 of PLCC32 */
@@ -357,25 +354,25 @@ static int board_acorp_6a815epd(const char *name)
  * Keep the second set NULLed if it should be ignored.
  */
 struct board_pciid_enable {
-	/* Any device, but make it sensible, like the isa bridge. */
+	/* Any device, but make it sensible, like the ISA bridge. */
 	uint16_t first_vendor;
 	uint16_t first_device;
 	uint16_t first_card_vendor;
 	uint16_t first_card_device;
 
 	/* Any device, but make it sensible, like 
-	 * the host bridge. May be NULL
+	 * the host bridge. May be NULL.
 	 */
 	uint16_t second_vendor;
 	uint16_t second_device;
 	uint16_t second_card_vendor;
 	uint16_t second_card_device;
 
-	/* From linuxbios table */
-	char *lb_vendor;
-	char *lb_part;
+	/* The vendor / part name from the LinuxBIOS table. */
+	const char *lb_vendor;
+	const char *lb_part;
 
-	char *name;
+	const char *name;
 	int (*enable) (const char *name);
 };
 
@@ -411,8 +408,7 @@ struct board_pciid_enable board_pciid_enables[] = {
  * Match boards on LinuxBIOS table gathered vendor and part name.
  * Require main PCI IDs to match too as extra safety.
  */
-static struct board_pciid_enable *board_match_linuxbios_name(char *vendor, 
-								char *part)
+static struct board_pciid_enable *board_match_linuxbios_name(const char *vendor, const char *part)
 {
 	struct board_pciid_enable *board = board_pciid_enables;
 
@@ -431,7 +427,9 @@ static struct board_pciid_enable *board_match_linuxbios_name(char *vendor,
 			continue;
 		return board;
 	}
+
 	printf("NOT FOUND %s:%s\n", vendor, part);
+
 	return NULL;
 }
 
@@ -472,7 +470,7 @@ static struct board_pciid_enable *board_match_pci_card_ids(void)
 	return NULL;
 }
 
-int board_flash_enable(char *vendor, char *part)
+int board_flash_enable(const char *vendor, const char *part)
 {
 	struct board_pciid_enable *board = NULL;
 	int ret = 0;
diff --git a/chipset_enable.c b/chipset_enable.c
index 87929f58..7eecf098 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 @@ static int enable_flash_ali_m1533(struct pci_dev *dev, char *name)
 	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 @@ static int enable_flash_sis630(struct pci_dev *dev, char *name)
  *   - 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 @@ static int enable_flash_piix4(struct pci_dev *dev, char *name)
 	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 @@ static int enable_flash_ich(struct pci_dev *dev, char *name, int bios_cntl)
 	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 @@ static int enable_flash_vt823x(struct pci_dev *dev, char *name)
 	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 @@ static int enable_flash_cs5530(struct pci_dev *dev, char *name)
 	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 @@ static int enable_flash_cs5536(struct pci_dev *dev, char *name)
 	/* 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 @@ static int enable_flash_cs5536(struct pci_dev *dev, char *name)
 	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 @@ static int enable_flash_sc1100(struct pci_dev *dev, char *name)
 	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 @@ static int enable_flash_sis5595(struct pci_dev *dev, char *name)
 	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 @@ static int enable_flash_amd8111(struct pci_dev *dev, char *name)
 	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 @@ static int enable_flash_ck804(struct pci_dev *dev, char *name)
 	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 @@ static int enable_flash_sb400(struct pci_dev *dev, char *name)
 	}
 
 	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 @@ static int enable_flash_sb400(struct pci_dev *dev, char *name)
 	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;
-
-	/* 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.
-	 */
+	uint8_t old, new, byte;
+	uint16_t word;
 
-	/* 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 @@ static int enable_flash_mcp55(struct pci_dev *dev, char *name)
 	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 @@ static int enable_flash_ht1000(struct pci_dev *dev, char *name)
 }
 
 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 @@ static FLASH_ENABLE enables[] = {
 	{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 @@ static FLASH_ENABLE enables[] = {
 	{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)
diff --git a/flash.h b/flash.h
index 898977f0..db3e0d6e 100644
--- a/flash.h
+++ b/flash.h
@@ -31,7 +31,7 @@
 #include <stdio.h>
 
 struct flashchip {
-	char *name;
+	const char *name;
 	int manufacture_id;
 	int model_id;
 
@@ -43,18 +43,18 @@ struct flashchip {
 	int (*write) (struct flashchip *flash, uint8_t *buf);
 	int (*read) (struct flashchip *flash, uint8_t *buf);
 
-	/* some flash devices have an additional
-	 * register space
-	 */
+	/* Some flash devices have an additional register space. */
 	volatile uint8_t *virtual_memory;
 	volatile uint8_t *virtual_registers;
 };
 
 extern struct flashchip flashchips[];
 
-/* Please keep this list sorted alphabetically by manufacturer. The first
+/*
+ * Please keep this list sorted alphabetically by manufacturer. The first
  * entry of each section should be the manufacturer ID, followed by the
  * list of devices from that manufacturer (sorted by device IDs).
+ *
  * All LPC/FWH parts (parallel flash) have 8-bit device IDs.
  * All SPI parts have 16-bit device IDs.
  */
@@ -80,9 +80,11 @@ extern struct flashchip flashchips[];
 #define EMST_ID			0x8C	/* EMST / EFST */
 #define EMST_F49B002UA		0x00
 
+/*
+ * EN25 chips are SPI, first byte of device ID is memory type,
+ * second byte of device ID is log(bitsize)-9.
+ */
 #define EON_ID			0x1C	/* EON */
-/* EN25 chips are SPI, first byte of device id is memory type,
- * second byte of device id is log(bitsize)-9. */
 #define EN_25B05		0x2010	/* 2^19 kbit or 2^16 kByte */
 #define EN_25B10		0x2011
 #define EN_25B20		0x2012
@@ -103,13 +105,15 @@ extern struct flashchip flashchips[];
 #define ISSI_ID			0xD5	/* ISSI */
 
 #define MSYSTEMS_ID		0x156F	/* M-Systems */
-#define MSYSTEMS_MD2200		0xDB	/* ? */
+#define MSYSTEMS_MD2200		0xDB
 #define MSYSTEMS_MD2800		0x30	/* hmm -- both 0x30 */
 #define MSYSTEMS_MD2802		0x30	/* hmm -- both 0x30 */
 
+/*
+ * MX25 chips are SPI, first byte of device ID is memory type,
+ * second byte of device ID is log(bitsize)-9.
+ */
 #define MX_ID			0xC2	/* Macronix (MX) */
-/* MX25 chips are SPI, first byte of device id is memory type,
- * second byte of device id is log(bitsize)-9. */
 #define MX_25L512		0x2010	/* 2^19 kbit or 2^16 kByte */
 #define MX_25L1005		0x2011
 #define MX_25L2005		0x2012
@@ -129,9 +133,11 @@ extern struct flashchip flashchips[];
 #define SHARP_ID		0xB0	/* Sharp */
 #define SHARP_LHF00L04		0xCF
 
+/*
+ * SST25 chips are SPI, first byte of device ID is memory type, second
+ * byte of device ID is related to log(bitsize) at least for some chips.
+ */
 #define SST_ID			0xBF	/* SST */
-/* SST25 chips are SPI, first byte of device id is memory type, second
- * byte of device id is related to log(bitsize) at least for some chips. */
 #define SST_25WF512		0x2501
 #define SST_25WF010		0x2502
 #define SST_25WF020		0x2503
@@ -196,22 +202,23 @@ extern struct flashchip flashchips[];
 #define W_49V002A		0xB0
 #define W_49V002FA		0x32
 
-/* function prototypes from udelay.h */
-
+/* udelay.c */
 void myusec_delay(int time);
 void myusec_calibrate_delay();
 
-/* pci handling for board/chipset_enable */
-struct pci_access *pacc;	/* For board and chipset_enable */
+/* PCI handling for board/chipset_enable */
+struct pci_access *pacc;
 struct pci_dev *pci_dev_find(uint16_t vendor, uint16_t device);
 struct pci_dev *pci_card_find(uint16_t vendor, uint16_t device,
 			      uint16_t card_vendor, uint16_t card_device);
 
-int board_flash_enable(char *vendor, char *part);	/* board_enable.c */
-int chipset_flash_enable(void);	/* chipset_enable.c */
+/* board_enable.c */
+int board_flash_enable(const char *vendor, const char *part);
 
-/* physical memory mapping device */
+/* chipset_enable.c */
+int chipset_flash_enable(void);
 
+/* Physical memory mapping device */
 #if defined (__sun) && (defined(__i386) || defined(__amd64))
 #  define MEM_DEV "/dev/xsvc"
 #else