linux 2.6.21: add gumstix support

1 files changed, 117 insertions, 0 deletions

diff --git a/packages/linux/linux-2.6.21/bkpxa-pxa-cpu.patch b/packages/linux/linux-2.6.21/bkpxa-pxa-cpu.patch
new file mode 100644
index 0000000000..6621fd0f51
--- /dev/null
+++ b/packages/linux/linux-2.6.21/bkpxa-pxa-cpu.patch
@@ -0,0 +1,117 @@
+Status: WORKS
+PXA CPU enhancements
+
+from patch 1667:
+- 64K PTEs
+from hh.org-cvs:
+- support in pxa_gpio_mode for active low
+
+#
+# Patch managed by http://www.mn-logistik.de/unsupported/pxa250/patcher
+#
+
+Index: linux-2.6.21gum/arch/arm/mm/proc-xscale.S
+===================================================================
+--- linux-2.6.21gum.orig/arch/arm/mm/proc-xscale.S
++++ linux-2.6.21gum/arch/arm/mm/proc-xscale.S
+@@ -474,11 +474,62 @@ ENTRY(cpu_xscale_set_pte_ext)
+ 	movne	r2, #0				@ no -> fault
+ 
+ 	str	r2, [r0]			@ hardware version
++
++	@ We try to map 64K page entries when possible.  
++	@ We do that for kernel space only since the usage pattern from
++	@ the setting of VM area is quite simple.  User space is not worth
++	@ the implied complexity because of ever randomly changing PTEs 
++	@ (page aging, swapout, etc) requiring constant coherency checks.
++	@ Since PTEs are usually set in increasing order, we test the
++	@ possibility for a large page only when given the last PTE of a
++	@ 64K boundary.
++	tsteq	r1, #L_PTE_USER
++	andeq	r1, r0, #(15 << 2)
++	teqeq	r1, #(15 << 2)
++	beq	1f
++
+ 	mov	ip, #0
+ 	mcr	p15, 0, r0, c7, c10, 1		@ Clean D cache line
+ 	mcr	p15, 0, ip, c7, c10, 4		@ Drain Write (& Fill) Buffer
+ 	mov	pc, lr
+ 
++	@ See if we have 16 identical PTEs but with consecutive base addresses
++1:	bic	r3, r2, #0x0000f000
++	mov	r1, #0x0000f000
++2:	eor	r2, r2, r3
++	teq	r2, r1
++	bne	4f
++	subs	r1, r1, #0x00001000
++	ldr	r2, [r0, #-4]!
++	bne	2b
++	eors	r2, r2, r3
++	bne	4f
++
++	@ Now create our LARGE PTE from the current EXT one.
++	bic	r3, r3, #PTE_TYPE_MASK
++	orr	r3, r3, #PTE_TYPE_LARGE
++	and	r2, r3, #0x30			@ EXT_AP --> LARGE_AP0
++	orr	r2, r2, r2, lsl #2		@ add LARGE_AP1
++	orr	r2, r2, r2, lsl #4		@ add LARGE_AP3 + LARGE_AP2
++	and	r1, r3, #0x3c0			@ EXT_TEX
++	bic	r3, r3, #0x3c0
++	orr	r2, r2, r1, lsl #(12 - 6)	@ --> LARGE_TEX
++	orr	r2, r2, r3			@ add remaining bits
++
++	@ then put it in the pagetable
++	mov	r3, r2
++3:	strd	r2, [r0], #8
++	tst	r0, #(15 << 2)
++	bne	3b
++
++	@ Then sync the 2 corresponding cache lines
++	sub	r0, r0, #(16 << 2)
++	mcr	p15, 0, r0, c7, c10, 1		@ Clean D cache line
++4:	orr	r0, r0, #(15 << 2)
++	mcr	p15, 0, r0, c7, c10, 1		@ Clean D cache line
++	mov	ip, #0
++	mcr	p15, 0, ip, c7, c10, 4		@ Drain Write (& Fill) Buffer
++	mov	pc, lr
+ 
+ 	.ltorg
+ 
+Index: linux-2.6.21gum/include/asm-arm/arch-pxa/pxa-regs.h
+===================================================================
+--- linux-2.6.21gum.orig/include/asm-arm/arch-pxa/pxa-regs.h
++++ linux-2.6.21gum/include/asm-arm/arch-pxa/pxa-regs.h
+@@ -1345,6 +1345,7 @@
+ #define GPIO_ALT_FN_2_OUT	0x280
+ #define GPIO_ALT_FN_3_IN	0x300
+ #define GPIO_ALT_FN_3_OUT	0x380
++#define GPIO_ACTIVE_LOW         0x1000
+ #define GPIO_MD_MASK_NR		0x07f
+ #define GPIO_MD_MASK_DIR	0x080
+ #define GPIO_MD_MASK_FN		0x300
+@@ -1597,6 +1598,25 @@
+ #define PWER_GPIO15	PWER_GPIO (15)	/* GPIO [15] wake-up enable        */
+ #define PWER_RTC	0x80000000	/* RTC alarm wake-up enable        */
+ 
++#define PWER_GPIO(Nb)	(1 << Nb)	/* GPIO [0..15] wake-up enable     */
++#define PWER_GPIO0	PWER_GPIO (0)	/* GPIO  [0] wake-up enable        */
++#define PWER_GPIO1	PWER_GPIO (1)	/* GPIO  [1] wake-up enable        */
++#define PWER_GPIO2	PWER_GPIO (2)	/* GPIO  [2] wake-up enable        */
++#define PWER_GPIO3	PWER_GPIO (3)	/* GPIO  [3] wake-up enable        */
++#define PWER_GPIO4	PWER_GPIO (4)	/* GPIO  [4] wake-up enable        */
++#define PWER_GPIO5	PWER_GPIO (5)	/* GPIO  [5] wake-up enable        */
++#define PWER_GPIO6	PWER_GPIO (6)	/* GPIO  [6] wake-up enable        */
++#define PWER_GPIO7	PWER_GPIO (7)	/* GPIO  [7] wake-up enable        */
++#define PWER_GPIO8	PWER_GPIO (8)	/* GPIO  [8] wake-up enable        */
++#define PWER_GPIO9	PWER_GPIO (9)	/* GPIO  [9] wake-up enable        */
++#define PWER_GPIO10	PWER_GPIO (10)	/* GPIO [10] wake-up enable        */
++#define PWER_GPIO11	PWER_GPIO (11)	/* GPIO [11] wake-up enable        */
++#define PWER_GPIO12	PWER_GPIO (12)	/* GPIO [12] wake-up enable        */
++#define PWER_GPIO13	PWER_GPIO (13)	/* GPIO [13] wake-up enable        */
++#define PWER_GPIO14	PWER_GPIO (14)	/* GPIO [14] wake-up enable        */
++#define PWER_GPIO15	PWER_GPIO (15)	/* GPIO [15] wake-up enable        */
++#define PWER_RTC	0x80000000	/* RTC alarm wake-up enable        */
++
+ 
+ /*
+  * SSP Serial Port Registers