#include <plat/serial.h>
+#define UART_OFFSET(addr) ((addr) & 0x00ffffff)
+
+ .pushsection .data
+omap_uart_phys: .word 0
+omap_uart_virt: .word 0
+omap_uart_lsr: .word 0
+ .popsection
+
+ /*
+ * Note that this code won't work if the bootloader passes
+ * a wrong machine ID number in r1. To debug, just hardcode
+ * the desired UART phys and virt addresses temporarily into
+ * the omap_uart_phys and omap_uart_virt above.
+ */
.macro addruart, rx, tmp
+
+ /* Use omap_uart_phys/virt if already configured */
+10: mrc p15, 0, \rx, c1, c0
+ tst \rx, #1 @ MMU enabled?
+ ldreq \rx, =omap_uart_phys @ physical base address
+ ldrne \rx, =omap_uart_virt @ virtual base address
+ ldr \rx, [\rx, #0]
+ cmp \rx, #0 @ is port configured?
+ bne 99f @ already configured
+
+ /* Check UART1 scratchpad register for uart to use */
mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
-#ifdef CONFIG_ARCH_OMAP2
moveq \rx, #0x48000000 @ physical base address
movne \rx, #0xfa000000 @ virtual base
- orr \rx, \rx, #0x0006a000
-#ifdef CONFIG_OMAP_LL_DEBUG_UART2
- add \rx, \rx, #0x00002000 @ UART 2
-#endif
-#ifdef CONFIG_OMAP_LL_DEBUG_UART3
- add \rx, \rx, #0x00004000 @ UART 3
-#endif
-
-#elif defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
- moveq \rx, #0x48000000 @ physical base address
- movne \rx, #0xfa000000 @ virtual base
- orr \rx, \rx, #0x0006a000
-#ifdef CONFIG_OMAP_LL_DEBUG_UART2
- add \rx, \rx, #0x00002000 @ UART 2
-#endif
-#ifdef CONFIG_OMAP_LL_DEBUG_UART3
- add \rx, \rx, #0x00fb0000 @ UART 3
- add \rx, \rx, #0x00006000
-#endif
-#endif
+ orr \rx, \rx, #0x0006a000 @ uart1 on omap2/3/4
+ ldrb \rx, [\rx, #(UART_SCR << OMAP_PORT_SHIFT)] @ scratchpad
+
+ /* Select the UART to use based on the UART1 scratchpad value */
+ cmp \rx, #0 @ no port configured?
+ beq 21f @ if none, try to use UART1
+ cmp \rx, #OMAP2UART1 @ OMAP2/3/4UART1
+ beq 21f @ configure OMAP2/3/4UART1
+ cmp \rx, #OMAP2UART2 @ OMAP2/3/4UART2
+ beq 22f @ configure OMAP2/3/4UART2
+ cmp \rx, #OMAP2UART3 @ only on 24xx
+ beq 23f @ configure OMAP2UART3
+ cmp \rx, #OMAP3UART3 @ only on 34xx
+ beq 33f @ configure OMAP3UART3
+ cmp \rx, #OMAP4UART3 @ only on 44xx
+ beq 43f @ configure OMAP4UART3
+ cmp \rx, #OMAP3UART4 @ only on 36xx
+ beq 34f @ configure OMAP3UART4
+ cmp \rx, #OMAP4UART4 @ only on 44xx
+ beq 44f @ configure OMAP4UART4
+ cmp \rx, #ZOOM_UART @ only on zoom2/3
+ beq 95f @ configure ZOOM_UART
+
+ /* Configure the UART offset from the phys/virt base */
+21: mov \rx, #UART_OFFSET(OMAP2_UART1_BASE) @ omap2/3/4
+ b 98f
+22: mov \rx, #UART_OFFSET(OMAP2_UART2_BASE) @ omap2/3/4
+ b 98f
+23: mov \rx, #UART_OFFSET(OMAP2_UART3_BASE)
+ b 98f
+33: mov \rx, #UART_OFFSET(OMAP3_UART1_BASE)
+ add \rx, \rx, #0x00fb0000
+ add \rx, \rx, #0x00006000 @ OMAP3_UART3_BASE
+ b 98f
+34: mov \rx, #UART_OFFSET(OMAP3_UART1_BASE)
+ add \rx, \rx, #0x00fb0000
+ add \rx, \rx, #0x00028000 @ OMAP3_UART4_BASE
+ b 98f
+43: mov \rx, #UART_OFFSET(OMAP4_UART3_BASE)
+ b 98f
+44: mov \rx, #UART_OFFSET(OMAP4_UART4_BASE)
+ b 98f
+95: mov \rx, #ZOOM_UART_BASE
+ ldr \tmp, =omap_uart_phys
+ str \rx, [\tmp, #0]
+ mov \rx, #ZOOM_UART_VIRT
+ ldr \tmp, =omap_uart_virt
+ str \rx, [\tmp, #0]
+ mov \rx, #(UART_LSR << ZOOM_PORT_SHIFT)
+ ldr \tmp, =omap_uart_lsr
+ str \rx, [\tmp, #0]
+ b 10b
+
+ /* Store both phys and virt address for the uart */
+98: add \rx, \rx, #0x48000000 @ phys base
+ ldr \tmp, =omap_uart_phys
+ str \rx, [\tmp, #0]
+ sub \rx, \rx, #0x48000000 @ phys base
+ add \rx, \rx, #0xfa000000 @ virt base
+ ldr \tmp, =omap_uart_virt
+ str \rx, [\tmp, #0]
+ mov \rx, #(UART_LSR << OMAP_PORT_SHIFT)
+ ldr \tmp, =omap_uart_lsr
+ str \rx, [\tmp, #0]
+
+ b 10b
+99:
.endm
.macro senduart,rd,rx
.endm
.macro busyuart,rd,rx
-1001: ldrb \rd, [\rx, #(UART_LSR << OMAP_PORT_SHIFT)]
+1001: ldr \rd, =omap_uart_lsr
+ ldr \rd, [\rd, #0]
+ ldrb \rd, [\rx, \rd]
and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
bne 1001b
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff