[PATCH] shpchp: Cleanup SHPC commands

This patch cleans up the code related to issuing SHPC commands. This
patch has no functional changes.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c
index e0f8c1b..f6b3bf3 100644 (file)
--- a/drivers/pci/hotplug/shpchp_hpc.c
+++ b/drivers/pci/hotplug/shpchp_hpc.c
@@ -147,39 +147,37 @@
 #define CON_PFAULT_SERR_MASK   (1 << 30)
 #define SLOT_REG_RSVDZ_MASK    (1 << 15) | (7 << 21)
 
-/* SHPC 'write' operations/commands */
-
-/* Slot operation - 0x00h to 0x3Fh */
-
-#define NO_CHANGE              0x00
-
-/* Slot state - Bits 0 & 1 of controller command register */
-#define SET_SLOT_PWR           0x01    
-#define SET_SLOT_ENABLE                0x02    
-#define SET_SLOT_DISABLE       0x03    
-
-/* Power indicator state - Bits 2 & 3 of controller command register*/
-#define SET_PWR_ON             0x04    
-#define SET_PWR_BLINK          0x08    
-#define SET_PWR_OFF            0x0C    
-
-/* Attention indicator state - Bits 4 & 5 of controller command register*/
-#define SET_ATTN_ON            0x010   
-#define SET_ATTN_BLINK         0x020
-#define SET_ATTN_OFF           0x030   
-
-/* Set bus speed/mode A - 0x40h to 0x47h */
-#define SETA_PCI_33MHZ         0x40
+/*
+ * SHPC Command Code definitnions
+ *
+ *     Slot Operation                          00h - 3Fh
+ *     Set Bus Segment Speed/Mode A            40h - 47h
+ *     Power-Only All Slots                    48h
+ *     Enable All Slots                                49h
+ *     Set Bus Segment Speed/Mode B (PI=2)     50h - 5Fh
+ *     Reserved Command Codes                  60h - BFh
+ *     Vendor Specific Commands                        C0h - FFh
+ */
+#define SET_SLOT_PWR           0x01    /* Slot Operation */
+#define SET_SLOT_ENABLE                0x02
+#define SET_SLOT_DISABLE       0x03
+#define SET_PWR_ON             0x04
+#define SET_PWR_BLINK          0x08
+#define SET_PWR_OFF            0x0c
+#define SET_ATTN_ON            0x10
+#define SET_ATTN_BLINK         0x20
+#define SET_ATTN_OFF           0x30
+#define SETA_PCI_33MHZ         0x40    /* Set Bus Segment Speed/Mode A */
 #define SETA_PCI_66MHZ         0x41
 #define SETA_PCIX_66MHZ                0x42
 #define SETA_PCIX_100MHZ       0x43
 #define SETA_PCIX_133MHZ       0x44
-#define RESERV_1               0x45
-#define RESERV_2               0x46
-#define RESERV_3               0x47
-
-/* Set bus speed/mode B - 0x50h to 0x5fh */
-#define        SETB_PCI_33MHZ          0x50
+#define SETA_RESERVED1         0x45
+#define SETA_RESERVED2         0x46
+#define SETA_RESERVED3         0x47
+#define SET_PWR_ONLY_ALL       0x48    /* Power-Only All Slots */
+#define SET_ENABLE_ALL         0x49    /* Enable All Slots */
+#define        SETB_PCI_33MHZ          0x50    /* Set Bus Segment Speed/Mode B */
 #define SETB_PCI_66MHZ         0x51
 #define SETB_PCIX_66MHZ_PM     0x52
 #define SETB_PCIX_100MHZ_PM    0x53
@@ -193,23 +191,21 @@
 #define SETB_PCIX_66MHZ_533    0x5b
 #define SETB_PCIX_100MHZ_533   0x5c
 #define SETB_PCIX_133MHZ_533   0x5d
+#define SETB_RESERVED1         0x5e
+#define SETB_RESERVED2         0x5f
 
-
-/* Power-on all slots - 0x48h */
-#define SET_PWR_ON_ALL         0x48
-
-/* Enable all slots    - 0x49h */
-#define SET_ENABLE_ALL         0x49
-
-/*  SHPC controller command error code */
+/*
+ * SHPC controller command error code
+ */
 #define SWITCH_OPEN            0x1
 #define INVALID_CMD            0x2
 #define INVALID_SPEED_MODE     0x4
 
-/* For accessing SHPC Working Register Set */
+/*
+ * For accessing SHPC Working Register Set via PCI Configuration Space
+ */
 #define DWORD_SELECT           0x2
 #define DWORD_DATA             0x4
-#define BASE_OFFSET            0x0
 
 /* Field Offset in Logical Slot Register - byte boundary */
 #define SLOT_EVENT_LATCH       0x2
@@ -630,13 +626,13 @@ static int hpc_set_attention_status(struct slot *slot, u8 value)
 
        switch (value) {
                case 0 :        
-                       slot_cmd = 0x30;        /* OFF */
+                       slot_cmd = SET_ATTN_OFF;        /* OFF */
                        break;
                case 1:
-                       slot_cmd = 0x10;        /* ON */
+                       slot_cmd = SET_ATTN_ON;         /* ON */
                        break;
                case 2:
-                       slot_cmd = 0x20;        /* BLINK */
+                       slot_cmd = SET_ATTN_BLINK;      /* BLINK */
                        break;
                default:
                        return -1;
@@ -648,17 +644,17 @@ static int hpc_set_attention_status(struct slot *slot, u8 value)
 
 static void hpc_set_green_led_on(struct slot *slot)
 {
-       shpc_write_cmd(slot, slot->hp_slot, 0x04);
+       shpc_write_cmd(slot, slot->hp_slot, SET_PWR_ON);
 }
 
 static void hpc_set_green_led_off(struct slot *slot)
 {
-       shpc_write_cmd(slot, slot->hp_slot, 0x0c);
+       shpc_write_cmd(slot, slot->hp_slot, SET_PWR_OFF);
 }
 
 static void hpc_set_green_led_blink(struct slot *slot)
 {
-       shpc_write_cmd(slot, slot->hp_slot, 0x08);
+       shpc_write_cmd(slot, slot->hp_slot, SET_PWR_BLINK);
 }
 
 int shpc_get_ctlr_slot_config(struct controller *ctrl,
@@ -769,7 +765,7 @@ static int hpc_power_on_slot(struct slot * slot)
 
        DBG_ENTER_ROUTINE 
 
-       retval = shpc_write_cmd(slot, slot->hp_slot, 0x01);
+       retval = shpc_write_cmd(slot, slot->hp_slot, SET_SLOT_PWR);
        if (retval) {
                err("%s: Write command failed!\n", __FUNCTION__);
                return retval;
@@ -786,8 +782,9 @@ static int hpc_slot_enable(struct slot * slot)
 
        DBG_ENTER_ROUTINE 
 
-       /* 3A => Slot - Enable, Power Indicator - Blink, Attention Indicator - Off */
-       retval = shpc_write_cmd(slot, slot->hp_slot, 0x3a);
+       /* Slot - Enable, Power Indicator - Blink, Attention Indicator - Off */
+       retval = shpc_write_cmd(slot, slot->hp_slot,
+                       SET_SLOT_ENABLE | SET_PWR_BLINK | SET_ATTN_OFF);
        if (retval) {
                err("%s: Write command failed!\n", __FUNCTION__);
                return retval;
@@ -803,8 +800,9 @@ static int hpc_slot_disable(struct slot * slot)
 
        DBG_ENTER_ROUTINE 
 
-       /* 1F => Slot - Disable, Power Indicator - Off, Attention Indicator - On */
-       retval = shpc_write_cmd(slot, slot->hp_slot, 0x1f);
+       /* Slot - Disable, Power Indicator - Off, Attention Indicator - On */
+       retval = shpc_write_cmd(slot, slot->hp_slot,
+                       SET_SLOT_DISABLE | SET_PWR_OFF | SET_ATTN_ON);
        if (retval) {
                err("%s: Write command failed!\n", __FUNCTION__);
                return retval;