From 4e6d488af37980d224cbf298224db6173673f362 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Mon, 1 Feb 2010 23:26:53 +0100 Subject: ARM: 5910/1: ARM: Add tmp register for addruart and loadsp Otherwise more complicated uart configuration won't be possible. We can use r1 for tmp register for both head.S and debug.S. NOTE: This patch depends on another patch to add the the tmp register into all debug-macro.S files. That can be done with: $ sed -i -e "s/addruart,rx|addruart, rx/addruart, rx, tmp/" arch/arm/*/include/*/debug-macro.S Signed-off-by: Tony Lindgren Signed-off-by: Russell King --- arch/arm/mach-omap1/include/mach/debug-macro.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm/mach-omap1/include/mach/debug-macro.S') diff --git a/arch/arm/mach-omap1/include/mach/debug-macro.S b/arch/arm/mach-omap1/include/mach/debug-macro.S index aedb746fc33c..8c74cab2fa8b 100644 --- a/arch/arm/mach-omap1/include/mach/debug-macro.S +++ b/arch/arm/mach-omap1/include/mach/debug-macro.S @@ -11,7 +11,7 @@ * */ - .macro addruart,rx + .macro addruart, rx, tmp mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? moveq \rx, #0xff000000 @ physical base address -- cgit v1.2.3 From 4f2c49fedf833e522001bc51824b894732900a3d Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Mon, 15 Feb 2010 08:48:53 -0800 Subject: omap: Clean the serial port defines This way we don't have conflicts with the defines with compiling in multiple omaps. Set the addresses for uarts in struct omap_globals for the early serial init code. Signed-off-by: Tony Lindgren --- arch/arm/mach-omap1/include/mach/debug-macro.S | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) (limited to 'arch/arm/mach-omap1/include/mach/debug-macro.S') diff --git a/arch/arm/mach-omap1/include/mach/debug-macro.S b/arch/arm/mach-omap1/include/mach/debug-macro.S index 8c74cab2fa8b..9ea12f29e0b6 100644 --- a/arch/arm/mach-omap1/include/mach/debug-macro.S +++ b/arch/arm/mach-omap1/include/mach/debug-macro.S @@ -11,6 +11,10 @@ * */ +#include + +#include + .macro addruart, rx, tmp mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? @@ -30,13 +34,13 @@ .endm .macro busyuart,rd,rx -1001: ldrb \rd, [\rx, #(0x5 << 2)] @ OMAP-1510 and friends - and \rd, \rd, #0x60 - teq \rd, #0x60 +1001: ldrb \rd, [\rx, #(UART_LSR << OMAP_PORT_SHIFT)] + and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE) + teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE) beq 1002f - ldrb \rd, [\rx, #(0x5 << 0)] @ OMAP-730 only - and \rd, \rd, #0x60 - teq \rd, #0x60 + ldrb \rd, [\rx, #(UART_LSR << OMAP7XX_PORT_SHIFT)] + and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE) + teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE) bne 1001b 1002: .endm -- cgit v1.2.3 From 0c8219f0302d0d27fda52c790d38406801e547ec Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Mon, 15 Feb 2010 08:49:01 -0800 Subject: omap: Make uncompress code and DEBUG_LL code generic Define arch_decomp_setup() the same way as some other architectures do. Use arch_id to configure the debug uart based on the machine_is by storing it into the uart scratchpad register for DEBUG_LL code to use. Signed-off-by: Tony Lindgren --- arch/arm/mach-omap1/include/mach/debug-macro.S | 72 +++++++++++++++++++++++--- 1 file changed, 65 insertions(+), 7 deletions(-) (limited to 'arch/arm/mach-omap1/include/mach/debug-macro.S') diff --git a/arch/arm/mach-omap1/include/mach/debug-macro.S b/arch/arm/mach-omap1/include/mach/debug-macro.S index 9ea12f29e0b6..b6d9584544b4 100644 --- a/arch/arm/mach-omap1/include/mach/debug-macro.S +++ b/arch/arm/mach-omap1/include/mach/debug-macro.S @@ -15,18 +15,76 @@ #include + .pushsection .data +omap_uart_phys: .word 0x0 +omap_uart_virt: .word 0x0 + .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 */ +9: 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 + ldr \rx, [\rx, #0] + cmp \rx, #0 @ is port configured? + bne 99f @ already configured + + /* Check 7XX UART1 scratchpad register for uart to use */ + mrc p15, 0, \rx, c1, c0 + tst \rx, #1 @ MMU enabled? + moveq \rx, #0xff000000 @ physical base address + movne \rx, #0xfe000000 @ virtual base + orr \rx, \rx, #0x00fb0000 @ OMAP1UART1 + ldrb \rx, [\rx, #(UART_SCR << OMAP7XX_PORT_SHIFT)] + cmp \rx, #0 @ anything in 7XX scratchpad? + bne 10f @ found 7XX uart + + /* Check 15xx/16xx UART1 scratchpad register for uart to use */ mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? moveq \rx, #0xff000000 @ physical base address movne \rx, #0xfe000000 @ virtual base - orr \rx, \rx, #0x00fb0000 -#ifdef CONFIG_OMAP_LL_DEBUG_UART3 - orr \rx, \rx, #0x00009000 @ UART 3 -#endif -#if defined(CONFIG_OMAP_LL_DEBUG_UART2) || defined(CONFIG_OMAP_LL_DEBUG_UART3) - orr \rx, \rx, #0x00000800 @ UART 2 & 3 -#endif + orr \rx, \rx, #0x00fb0000 @ OMAP1UART1 + ldrb \rx, [\rx, #(UART_SCR << OMAP_PORT_SHIFT)] + + /* Select the UART to use based on the UART1 scratchpad value */ +10: cmp \rx, #0 @ no port configured? + beq 11f @ if none, try to use UART1 + cmp \rx, #OMAP1UART1 + beq 11f @ configure OMAP1UART1 + cmp \rx, #OMAP1UART2 + beq 12f @ configure OMAP1UART2 + cmp \rx, #OMAP1UART3 + beq 13f @ configure OMAP2UART3 + + /* Configure the UART offset from the phys/virt base */ +11: mov \rx, #0x00fb0000 @ OMAP1UART1 + b 98f +12: mov \rx, #0x00fb0000 @ OMAP1UART1 + orr \rx, \rx, #0x00000800 @ OMAP1UART2 + b 98f +13: mov \rx, #0x00fb0000 @ OMAP1UART1 + orr \rx, \rx, #0x00000800 @ OMAP1UART2 + orr \rx, \rx, #0x00009000 @ OMAP1UART3 + + /* Store both phys and virt address for the uart */ +98: add \rx, \rx, #0xff000000 @ phys base + ldr \tmp, =omap_uart_phys + str \rx, [\tmp, #0] + sub \rx, \rx, #0xff000000 @ phys base + add \rx, \rx, #0xfe000000 @ virt base + ldr \tmp, =omap_uart_virt + str \rx, [\tmp, #0] + b 9b +99: .endm .macro senduart,rd,rx -- cgit v1.2.3