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libpayload/xhci: Document struct offsets on xhci_t 

This makes it easier to know what offset each register references.

BUG=b:76831439
TEST=none

Change-Id: I92dcbd463ceb4dd8edbbd97b51a4e9aa32a983a6
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/27474
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Raul E Rangel 2018-07-13 15:16:58 -06:00 committed by Patrick Georgi
parent 8aef4f57f8
commit 8fdc9162d9
1 changed files with 25 additions and 25 deletions
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50
payloads/libpayload/drivers/usb/xhci_private.h
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@ -325,16 +325,16 @@ typedef struct xhci {
/* capreg is read-only, so no need for volatile, /* capreg is read-only, so no need for volatile,
and thus 32bit accesses can be assumed. */ and thus 32bit accesses can be assumed. */
struct capreg { struct capreg {
u8 caplength; u8 caplength; /* 0x00 */
u8 res1; u8 res1; /* 0x01 */
union { union { /* 0x02 */
u16 hciversion; u16 hciversion;
struct { struct {
u8 hciver_lo; u8 hciver_lo;
u8 hciver_hi; u8 hciver_hi;
} __packed; } __packed;
} __packed; } __packed;
union { union { /* 0x04 */
u32 hcsparams1; u32 hcsparams1;
struct { struct {
unsigned long MaxSlots:7; unsigned long MaxSlots:7;
@ -343,7 +343,7 @@ typedef struct xhci {
unsigned long MaxPorts:8; unsigned long MaxPorts:8;
} __packed; } __packed;
} __packed; } __packed;
union { union { /* 0x08 */
u32 hcsparams2; u32 hcsparams2;
struct { struct {
unsigned long IST:4; unsigned long IST:4;
@ -354,7 +354,7 @@ typedef struct xhci {
unsigned long Max_Scratchpad_Bufs_Lo:5; unsigned long Max_Scratchpad_Bufs_Lo:5;
} __packed; } __packed;
} __packed; } __packed;
union { union { /* 0x0C */
u32 hcsparams3; u32 hcsparams3;
struct { struct {
unsigned long u1latency:8; unsigned long u1latency:8;
@ -362,7 +362,7 @@ typedef struct xhci {
unsigned long u2latency:16; unsigned long u2latency:16;
} __packed; } __packed;
} __packed; } __packed;
union { union { /* 0x10 */
u32 hccparams; u32 hccparams;
struct { struct {
unsigned long ac64:1; unsigned long ac64:1;
@ -378,42 +378,42 @@ typedef struct xhci {
unsigned long xECP:16; unsigned long xECP:16;
} __packed; } __packed;
} __packed; } __packed;
u32 dboff; u32 dboff; /* 0x14 */
u32 rtsoff; u32 rtsoff; /* 0x18 */
} __packed *capreg; } __packed *capreg;
/* opreg is R/W is most places, so volatile access is necessary. /* opreg is R/W is most places, so volatile access is necessary.
volatile means that the compiler seeks byte writes if possible, volatile means that the compiler seeks byte writes if possible,
making bitfields unusable for MMIO register blocks. Yay C :-( */ making bitfields unusable for MMIO register blocks. Yay C :-( */
volatile struct opreg { volatile struct opreg {
u32 usbcmd; u32 usbcmd; /* 0x00 */
#define USBCMD_RS (1 << 0) #define USBCMD_RS (1 << 0)
#define USBCMD_HCRST (1 << 1) #define USBCMD_HCRST (1 << 1)
#define USBCMD_INTE (1 << 2) #define USBCMD_INTE (1 << 2)
u32 usbsts; u32 usbsts; /* 0x04 */
#define USBSTS_HCH (1 << 0) #define USBSTS_HCH (1 << 0)
#define USBSTS_HSE (1 << 2) #define USBSTS_HSE (1 << 2)
#define USBSTS_EINT (1 << 3) #define USBSTS_EINT (1 << 3)
#define USBSTS_PCD (1 << 4) #define USBSTS_PCD (1 << 4)
#define USBSTS_CNR (1 << 11) #define USBSTS_CNR (1 << 11)
#define USBSTS_PRSRV_MASK ((1 << 1) | 0xffffe000) #define USBSTS_PRSRV_MASK ((1 << 1) | 0xffffe000)
u32 pagesize; u32 pagesize; /* 0x08 */
u8 res1[0x13-0x0c+1]; u8 res1[0x13-0x0c+1]; /* 0x0C */
u32 dnctrl; u32 dnctrl; /* 0x14 */
u32 crcr_lo; u32 crcr_lo; /* 0x18 */
u32 crcr_hi; u32 crcr_hi; /* 0x1C */
#define CRCR_RCS (1 << 0) #define CRCR_RCS (1 << 0)
#define CRCR_CS (1 << 1) #define CRCR_CS (1 << 1)
#define CRCR_CA (1 << 2) #define CRCR_CA (1 << 2)
#define CRCR_CRR (1 << 3) #define CRCR_CRR (1 << 3)
u8 res2[0x2f-0x20+1]; u8 res2[0x2f-0x20+1]; /* 0x20 */
u32 dcbaap_lo; u32 dcbaap_lo; /* 0x30 */
u32 dcbaap_hi; u32 dcbaap_hi; /* 0x34 */
u32 config; u32 config; /* 0x38 */
#define CONFIG_LP_MASK_MaxSlotsEn 0xff #define CONFIG_LP_MASK_MaxSlotsEn 0xff
u8 res3[0x3ff-0x3c+1]; u8 res3[0x3ff-0x3c+1]; /* 0x3C */
struct { struct {
u32 portsc; u32 portsc; /* 0x400 + 4 * port */
#define PORTSC_CCS (1 << 0) #define PORTSC_CCS (1 << 0)
#define PORTSC_PED (1 << 1) #define PORTSC_PED (1 << 1)
// BIT 2 rsvdZ // BIT 2 rsvdZ
@ -443,9 +443,9 @@ typedef struct xhci {
#define PORTSC_DR (1 << 30) #define PORTSC_DR (1 << 30)
#define PORTSC_WPR (1 << 31) #define PORTSC_WPR (1 << 31)
#define PORTSC_RW_MASK (PORTSC_PR | PORTSC_PLS_MASK | PORTSC_PP | PORTSC_PIC_MASK | PORTSC_LWS | PORTSC_WCE | PORTSC_WDE | PORTSC_WOE) #define PORTSC_RW_MASK (PORTSC_PR | PORTSC_PLS_MASK | PORTSC_PP | PORTSC_PIC_MASK | PORTSC_LWS | PORTSC_WCE | PORTSC_WDE | PORTSC_WOE)
u32 portpmsc; u32 portpmsc; /* 0x404 + 4 * port */
u32 portli; u32 portli; /* 0x408 + 4 * port */
u32 res; u32 res; /* 0x40C + 4 * port */
} __packed prs[]; } __packed prs[];
} __packed *opreg; } __packed *opreg;