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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3201 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2010-12-20 20:59:12 +00:00
parent 55a5671383
commit f9c678f4d0
2 changed files with 365 additions and 41 deletions
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arch/arm/src/lpc17xx/lpc17_ohciram.h
+16 -7
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@@ -144,7 +144,12 @@
#if CONFIG_USBHOST_TDBUFFERS > 0 && !defined(CONFIG_USBHOST_TDBUFSIZE)
# define CONFIG_USBHOST_TDBUFSIZE 128
#endif
#define LPC17_TDBUFFER_SIZE (CONFIG_USBHOST_TDBUFFERS * CONFIG_USBHOST_TDBUFSIZE)
#if (CONFIG_USBHOST_TDBUFSIZE & 3) != 0
# error "TD buffer size must be an even number of 32-bit words"
#endif
#define LPC17_TDFREE_SIZE (CONFIG_USBHOST_TDBUFFERS * CONFIG_USBHOST_TDBUFSIZE)
/* Configurable size of an IO buffer. The number of IO buffers will be determined
* by what is left at the end of the BANK1 memory setup aside of OHCI RAM.
@@ -154,6 +159,10 @@
# define CONFIG_USBHOST_IOBUFSIZE 512
#endif
#if (CONFIG_USBHOST_IOBUFSIZE & 3) != 0
# error "IO buffer size must be an even number of 32-bit words"
#endif
/* OHCI Memory Layout ***************************************************************/
/* Example:
* Hardware:
@@ -171,8 +180,8 @@
* Sizes of things
* CONFIG_USBHOST_NEDS 2
* LPC17_EDFREE_SIZE 48
* LPC17_TDBUFFER_SIZE 128
* LPC17_TDBUFFER_SIZE 512
* LPC17_TDFREE_SIZE 128
* LPC17_IOFREE_SIZE 512
*
* Memory Layout
* LPC17_OHCIRAM_END (0x20008000 + 16384) = 0x2000c000
@@ -186,8 +195,8 @@
* LPC17_TDTAIL_ADDR 0x2000bd10
* LPC17_EDCTRL_ADDR 0x2000bd20
* LPC17_EDFREE_BASE 0x2000bd30
* LPC17_TDBUFFER_BASE 0x2000bd50
* LPC17_IOBUFFER_BASE 0x2000bdd0
* LPC17_TDFREE_BASE 0x2000bd50
* LPC17_IOFREE_BASE 0x2000bdd0
* LPC17_IOBUFFERS (0x2000c000 + 0x2000bdd0) / 512 = 560/512 = 1
*
* Wasted memory: 560-512 = 48 bytes
@@ -198,8 +207,8 @@
#define LPC17_TDTAIL_ADDR (LPC17_TDHEAD_ADDR + LPC17_TD_SIZE)
#define LPC17_EDCTRL_ADDR (LPC17_TDTAIL_ADDR + LPC17_TD_SIZE)
#define LPC17_EDFREE_BASE (LPC17_EDCTRL_ADDR + LPC17_ED_SIZE)
#define LPC17_TDBUFFER_BASE (LPC17_EDFREE_BASE + LPC17_EDFREE_SIZE)
#define LPC17_IOBUFFER_BASE (LPC17_TDBUFFER_BASE + LPC17_TDBUFFER_SIZE)
#define LPC17_TDFREE_BASE (LPC17_EDFREE_BASE + LPC17_EDFREE_SIZE)
#define LPC17_IOFREE_BASE (LPC17_TDFREE_BASE + LPC17_TDFREE_SIZE)
/* Finally, use the remainder of the allocated OHCI for IO buffers */
arch/arm/src/lpc17xx/lpc17_usbhost.c
+349 -34
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