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cmd64x: procfs code fixes/cleanups (take 2)
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Fix several issues with the driver's procfs output:

- when testing if channel is enabled, the code looks at the "simplex" bits, not
  at the real enable bits -- add #define for the primary channel enable bit;

- UltraDMA modes 0, 1, 3 for slave drive reported incorrectly due to using the
  master drive's clock cycle resolution bit.

While at it, also perform the following cleanups:

- don't print extra newline before the first controller's dump;

- correct the chipset names (from CMDxxx to PCI-xxx)

- don't read from the registers which aren't used for dump;

- better align the table column sizes;

- rework UltraDMA mode dump code;

- remove PIO mode dump code that has never been finished;

- remove the duplicate interrupt status (the MRDMODE register bits mirror those
  those in the CFR and ARTTIM23 registers) and fold the dump into single line;

- correct the style of the ?: operators...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Sergei Shtylyov authored and Bartlomiej Zolnierkiewicz committed May 5, 2007
1 parent 7accbff commit 5826b31
Showing 1 changed file with 55 additions and 74 deletions.
129 changes: 55 additions & 74 deletions drivers/ide/pci/cmd64x.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* linux/drivers/ide/pci/cmd64x.c Version 1.45 Mar 14, 2007
* linux/drivers/ide/pci/cmd64x.c Version 1.46 Mar 16, 2007
*
* cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
* Due to massive hardware bugs, UltraDMA is only supported
Expand Down Expand Up @@ -38,9 +38,10 @@
#define CFR 0x50
#define CFR_INTR_CH0 0x04
#define CNTRL 0x51
#define CNTRL_DIS_RA0 0x40
#define CNTRL_DIS_RA1 0x80
#define CNTRL_ENA_2ND 0x08
#define CNTRL_ENA_1ST 0x04
#define CNTRL_ENA_2ND 0x08
#define CNTRL_DIS_RA0 0x40
#define CNTRL_DIS_RA1 0x80

#define CMDTIM 0x52
#define ARTTIM0 0x53
Expand Down Expand Up @@ -87,86 +88,67 @@ static int n_cmd_devs;
static char * print_cmd64x_get_info (char *buf, struct pci_dev *dev, int index)
{
char *p = buf;

u8 reg53 = 0, reg54 = 0, reg55 = 0, reg56 = 0; /* primary */
u8 reg57 = 0, reg58 = 0, reg5b; /* secondary */
u8 reg72 = 0, reg73 = 0; /* primary */
u8 reg7a = 0, reg7b = 0; /* secondary */
u8 reg50 = 0, reg71 = 0; /* extra */
u8 reg50 = 1, reg51 = 1, reg57 = 0, reg71 = 0; /* extra */
u8 rev = 0;

p += sprintf(p, "\nController: %d\n", index);
p += sprintf(p, "CMD%x Chipset.\n", dev->device);
p += sprintf(p, "PCI-%x Chipset.\n", dev->device);

(void) pci_read_config_byte(dev, CFR, &reg50);
(void) pci_read_config_byte(dev, ARTTIM0, &reg53);
(void) pci_read_config_byte(dev, DRWTIM0, &reg54);
(void) pci_read_config_byte(dev, ARTTIM1, &reg55);
(void) pci_read_config_byte(dev, DRWTIM1, &reg56);
(void) pci_read_config_byte(dev, ARTTIM2, &reg57);
(void) pci_read_config_byte(dev, DRWTIM2, &reg58);
(void) pci_read_config_byte(dev, DRWTIM3, &reg5b);
(void) pci_read_config_byte(dev, CNTRL, &reg51);
(void) pci_read_config_byte(dev, ARTTIM23, &reg57);
(void) pci_read_config_byte(dev, MRDMODE, &reg71);
(void) pci_read_config_byte(dev, BMIDESR0, &reg72);
(void) pci_read_config_byte(dev, UDIDETCR0, &reg73);
(void) pci_read_config_byte(dev, BMIDESR1, &reg7a);
(void) pci_read_config_byte(dev, UDIDETCR1, &reg7b);

p += sprintf(p, "--------------- Primary Channel "
"---------------- Secondary Channel "
"-------------\n");
p += sprintf(p, " %sabled "
" %sabled\n",
(reg72&0x80)?"dis":" en",
(reg7a&0x80)?"dis":" en");
p += sprintf(p, "--------------- drive0 "
"--------- drive1 -------- drive0 "
"---------- drive1 ------\n");
p += sprintf(p, "DMA enabled: %s %s"
" %s %s\n",
(reg72&0x20)?"yes":"no ", (reg72&0x40)?"yes":"no ",
(reg7a&0x20)?"yes":"no ", (reg7a&0x40)?"yes":"no ");

p += sprintf(p, "DMA Mode: %s(%s) %s(%s)",
(reg72&0x20)?((reg73&0x01)?"UDMA":" DMA"):" PIO",
(reg72&0x20)?(
((reg73&0x30)==0x30)?(((reg73&0x35)==0x35)?"3":"0"):
((reg73&0x20)==0x20)?(((reg73&0x25)==0x25)?"3":"1"):
((reg73&0x10)==0x10)?(((reg73&0x15)==0x15)?"4":"2"):
((reg73&0x00)==0x00)?(((reg73&0x05)==0x05)?"5":"2"):
"X"):"?",
(reg72&0x40)?((reg73&0x02)?"UDMA":" DMA"):" PIO",
(reg72&0x40)?(
((reg73&0xC0)==0xC0)?(((reg73&0xC5)==0xC5)?"3":"0"):
((reg73&0x80)==0x80)?(((reg73&0x85)==0x85)?"3":"1"):
((reg73&0x40)==0x40)?(((reg73&0x4A)==0x4A)?"4":"2"):
((reg73&0x00)==0x00)?(((reg73&0x0A)==0x0A)?"5":"2"):
"X"):"?");
p += sprintf(p, " %s(%s) %s(%s)\n",
(reg7a&0x20)?((reg7b&0x01)?"UDMA":" DMA"):" PIO",
(reg7a&0x20)?(
((reg7b&0x30)==0x30)?(((reg7b&0x35)==0x35)?"3":"0"):
((reg7b&0x20)==0x20)?(((reg7b&0x25)==0x25)?"3":"1"):
((reg7b&0x10)==0x10)?(((reg7b&0x15)==0x15)?"4":"2"):
((reg7b&0x00)==0x00)?(((reg7b&0x05)==0x05)?"5":"2"):
"X"):"?",
(reg7a&0x40)?((reg7b&0x02)?"UDMA":" DMA"):" PIO",
(reg7a&0x40)?(
((reg7b&0xC0)==0xC0)?(((reg7b&0xC5)==0xC5)?"3":"0"):
((reg7b&0x80)==0x80)?(((reg7b&0x85)==0x85)?"3":"1"):
((reg7b&0x40)==0x40)?(((reg7b&0x4A)==0x4A)?"4":"2"):
((reg7b&0x00)==0x00)?(((reg7b&0x0A)==0x0A)?"5":"2"):
"X"):"?" );
p += sprintf(p, "PIO Mode: %s %s"
" %s %s\n",
"?", "?", "?", "?");
p += sprintf(p, " %s %s\n",
(reg50 & CFR_INTR_CH0) ? "interrupting" : "polling ",
(reg57 & ARTTIM23_INTR_CH1) ? "interrupting" : "polling");
p += sprintf(p, " %s %s\n",
(reg71 & MRDMODE_INTR_CH0) ? "pending" : "clear ",
(reg71 & MRDMODE_INTR_CH1) ? "pending" : "clear");
p += sprintf(p, " %s %s\n",
(reg71 & MRDMODE_BLK_CH0) ? "blocked" : "enabled",
(reg71 & MRDMODE_BLK_CH1) ? "blocked" : "enabled");
/* PCI0643/6 originally didn't have the primary channel enable bit */
(void) pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
if ((dev->device == PCI_DEVICE_ID_CMD_643) ||
(dev->device == PCI_DEVICE_ID_CMD_646 && rev < 3))
reg51 |= CNTRL_ENA_1ST;

p += sprintf(p, "---------------- Primary Channel "
"---------------- Secondary Channel ------------\n");
p += sprintf(p, " %s %s\n",
(reg51 & CNTRL_ENA_1ST) ? "enabled " : "disabled",
(reg51 & CNTRL_ENA_2ND) ? "enabled " : "disabled");
p += sprintf(p, "---------------- drive0 --------- drive1 "
"-------- drive0 --------- drive1 ------\n");
p += sprintf(p, "DMA enabled: %s %s"
" %s %s\n",
(reg72 & 0x20) ? "yes" : "no ", (reg72 & 0x40) ? "yes" : "no ",
(reg7a & 0x20) ? "yes" : "no ", (reg7a & 0x40) ? "yes" : "no ");
p += sprintf(p, "UltraDMA mode: %s (%c) %s (%c)",
( reg73 & 0x01) ? " on" : "off",
((reg73 & 0x30) == 0x30) ? ((reg73 & 0x04) ? '3' : '0') :
((reg73 & 0x30) == 0x20) ? ((reg73 & 0x04) ? '3' : '1') :
((reg73 & 0x30) == 0x10) ? ((reg73 & 0x04) ? '4' : '2') :
((reg73 & 0x30) == 0x00) ? ((reg73 & 0x04) ? '5' : '2') : '?',
( reg73 & 0x02) ? " on" : "off",
((reg73 & 0xC0) == 0xC0) ? ((reg73 & 0x08) ? '3' : '0') :
((reg73 & 0xC0) == 0x80) ? ((reg73 & 0x08) ? '3' : '1') :
((reg73 & 0xC0) == 0x40) ? ((reg73 & 0x08) ? '4' : '2') :
((reg73 & 0xC0) == 0x00) ? ((reg73 & 0x08) ? '5' : '2') : '?');
p += sprintf(p, " %s (%c) %s (%c)\n",
( reg7b & 0x01) ? " on" : "off",
((reg7b & 0x30) == 0x30) ? ((reg7b & 0x04) ? '3' : '0') :
((reg7b & 0x30) == 0x20) ? ((reg7b & 0x04) ? '3' : '1') :
((reg7b & 0x30) == 0x10) ? ((reg7b & 0x04) ? '4' : '2') :
((reg7b & 0x30) == 0x00) ? ((reg7b & 0x04) ? '5' : '2') : '?',
( reg7b & 0x02) ? " on" : "off",
((reg7b & 0xC0) == 0xC0) ? ((reg7b & 0x08) ? '3' : '0') :
((reg7b & 0xC0) == 0x80) ? ((reg7b & 0x08) ? '3' : '1') :
((reg7b & 0xC0) == 0x40) ? ((reg7b & 0x08) ? '4' : '2') :
((reg7b & 0xC0) == 0x00) ? ((reg7b & 0x08) ? '5' : '2') : '?');
p += sprintf(p, "Interrupt: %s, %s %s, %s\n",
(reg71 & MRDMODE_BLK_CH0 ) ? "blocked" : "enabled",
(reg50 & CFR_INTR_CH0 ) ? "pending" : "clear ",
(reg71 & MRDMODE_BLK_CH1 ) ? "blocked" : "enabled",
(reg57 & ARTTIM23_INTR_CH1) ? "pending" : "clear ");

return (char *)p;
}
Expand All @@ -176,7 +158,6 @@ static int cmd64x_get_info (char *buffer, char **addr, off_t offset, int count)
char *p = buffer;
int i;

p += sprintf(p, "\n");
for (i = 0; i < n_cmd_devs; i++) {
struct pci_dev *dev = cmd_devs[i];
p = print_cmd64x_get_info(p, dev, i);
Expand Down

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