git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c6337e2 KH |
1 | /* |
| 2 | * Debugging macro for DaVinci | |
| 3 | * | |
| 4 | * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com> | |
| 5 | * | |
| 6 | * 2007 (c) MontaVista Software, Inc. This file is licensed under | |
| 7 | * the terms of the GNU General Public License version 2. This program | |
| 8 | * is licensed "as is" without any warranty of any kind, whether express | |
| 9 | * or implied. | |
| 10 | */ | |
| 11 | ||
| 17eb1570 C |
12 | /* Modifications |
| 13 | * Jan 2009 Chaithrika U S Added senduart, busyuart, waituart | |
| 14 | * macros, based on debug-8250.S file | |
| 15 | * but using 32-bit accesses required for | |
| 16 | * some davinci devices. | |
| 17 | */ | |
| 18 | ||
| 19 | #include <linux/serial_reg.h> | |
| dc2eb76c CC |
20 | |
| 21 | #include <asm/memory.h> | |
| 22 | ||
| 23 | #include <mach/serial.h> | |
| 24 | ||
| 17eb1570 C |
25 | #define UART_SHIFT 2 |
| 26 | ||
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27 | .pushsection .data |
| 28 | davinci_uart_phys: .word 0 | |
| 29 | davinci_uart_virt: .word 0 | |
| 30 | .popsection | |
| 31 | ||
| 0ea12930 | 32 | .macro addruart, rp, rv |
| dc2eb76c CC |
33 | |
| 34 | /* Use davinci_uart_phys/virt if already configured */ | |
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35 | 10: mrc p15, 0, \rp, c1, c0 |
| 36 | tst \rp, #1 @ MMU enabled? | |
| 37 | ldreq \rp, =__virt_to_phys(davinci_uart_phys) | |
| 38 | ldrne \rp, =davinci_uart_phys | |
| 39 | add \rv, \rp, #4 @ davinci_uart_virt | |
| 40 | ldr \rp, [\rp, #0] | |
| 41 | ldr \rv, [\rv, #0] | |
| 42 | cmp \rp, #0 @ is port configured? | |
| 43 | cmpne \rv, #0 | |
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44 | bne 99f @ already configured |
| 45 | ||
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46 | /* Check the debug UART address set in uncompress.h */ |
| 47 | mrc p15, 0, \rp, c1, c0 | |
| 48 | tst \rp, #1 @ MMU enabled? | |
| dc2eb76c CC |
49 | |
| 50 | /* Copy uart phys address from decompressor uart info */ | |
| 0ea12930 JK |
51 | ldreq \rv, =__virt_to_phys(davinci_uart_phys) |
| 52 | ldrne \rv, =davinci_uart_phys | |
| 53 | ldreq \rp, =DAVINCI_UART_INFO | |
| 54 | ldrne \rp, =__phys_to_virt(DAVINCI_UART_INFO) | |
| 55 | ldr \rp, [\rp, #0] | |
| 56 | str \rp, [\rv] | |
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57 | |
| 58 | /* Copy uart virt address from decompressor uart info */ | |
| 0ea12930 JK |
59 | ldreq \rv, =__virt_to_phys(davinci_uart_virt) |
| 60 | ldrne \rv, =davinci_uart_virt | |
| 61 | ldreq \rp, =DAVINCI_UART_INFO | |
| 62 | ldrne \rp, =__phys_to_virt(DAVINCI_UART_INFO) | |
| 63 | ldr \rp, [\rp, #4] | |
| 64 | str \rp, [\rv] | |
| dc2eb76c CC |
65 | |
| 66 | b 10b | |
| 67 | 99: | |
| 7c6337e2 KH |
68 | .endm |
| 69 | ||
| 17eb1570 C |
70 | .macro senduart,rd,rx |
| 71 | str \rd, [\rx, #UART_TX << UART_SHIFT] | |
| 72 | .endm | |
| 73 | ||
| 74 | .macro busyuart,rd,rx | |
| 75 | 1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT] | |
| 76 | and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE | |
| 77 | teq \rd, #UART_LSR_TEMT | UART_LSR_THRE | |
| 78 | bne 1002b | |
| 79 | .endm | |
| 80 | ||
| 81 | .macro waituart,rd,rx | |
| 82 | #ifdef FLOW_CONTROL | |
| 83 | 1001: ldr \rd, [\rx, #UART_MSR << UART_SHIFT] | |
| 84 | tst \rd, #UART_MSR_CTS | |
| 85 | beq 1001b | |
| 86 | #endif | |
| 87 | .endm | |
| 88 |