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| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 5bf9cbef9972f851172391a37261b12bba63f733 | ||
| refs/heads/master: abf5940dad78dde95edd7f6ba6e329cd10a92a5c |
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| Kernel driver tmp421 | ||
| ==================== | ||
|
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| Supported chips: | ||
| * Texas Instruments TMP421 | ||
| Prefix: 'tmp421' | ||
| Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f | ||
| Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html | ||
| * Texas Instruments TMP422 | ||
| Prefix: 'tmp422' | ||
| Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f | ||
| Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html | ||
| * Texas Instruments TMP423 | ||
| Prefix: 'tmp423' | ||
| Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f | ||
| Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html | ||
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| Authors: | ||
| Andre Prendel <andre.prendel@gmx.de> | ||
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| Description | ||
| ----------- | ||
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| This driver implements support for Texas Instruments TMP421, TMP422 | ||
| and TMP423 temperature sensor chips. These chips implement one local | ||
| and up to one (TMP421), up to two (TMP422) or up to three (TMP423) | ||
| remote sensors. Temperature is measured in degrees Celsius. The chips | ||
| are wired over I2C/SMBus and specified over a temperature range of -40 | ||
| to +125 degrees Celsius. Resolution for both the local and remote | ||
| channels is 0.0625 degree C. | ||
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| The chips support only temperature measurement. The driver exports | ||
| the temperature values via the following sysfs files: | ||
|
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| temp[1-4]_input | ||
| temp[2-4]_fault |
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,5 +1,170 @@ | ||
| #ifdef __uClinux__ | ||
| #include "checksum_no.h" | ||
| #ifndef _M68K_CHECKSUM_H | ||
| #define _M68K_CHECKSUM_H | ||
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| #include <linux/in6.h> | ||
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| /* | ||
| * computes the checksum of a memory block at buff, length len, | ||
| * and adds in "sum" (32-bit) | ||
| * | ||
| * returns a 32-bit number suitable for feeding into itself | ||
| * or csum_tcpudp_magic | ||
| * | ||
| * this function must be called with even lengths, except | ||
| * for the last fragment, which may be odd | ||
| * | ||
| * it's best to have buff aligned on a 32-bit boundary | ||
| */ | ||
| __wsum csum_partial(const void *buff, int len, __wsum sum); | ||
|
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| /* | ||
| * the same as csum_partial, but copies from src while it | ||
| * checksums | ||
| * | ||
| * here even more important to align src and dst on a 32-bit (or even | ||
| * better 64-bit) boundary | ||
| */ | ||
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| extern __wsum csum_partial_copy_from_user(const void __user *src, | ||
| void *dst, | ||
| int len, __wsum sum, | ||
| int *csum_err); | ||
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| extern __wsum csum_partial_copy_nocheck(const void *src, | ||
| void *dst, int len, | ||
| __wsum sum); | ||
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| #ifdef CONFIG_COLDFIRE | ||
|
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| /* | ||
| * The ColdFire cores don't support all the 68k instructions used | ||
| * in the optimized checksum code below. So it reverts back to using | ||
| * more standard C coded checksums. The fast checksum code is | ||
| * significantly larger than the optimized version, so it is not | ||
| * inlined here. | ||
| */ | ||
| __sum16 ip_fast_csum(const void *iph, unsigned int ihl); | ||
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| static inline __sum16 csum_fold(__wsum sum) | ||
| { | ||
| unsigned int tmp = (__force u32)sum; | ||
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| tmp = (tmp & 0xffff) + (tmp >> 16); | ||
| tmp = (tmp & 0xffff) + (tmp >> 16); | ||
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| return (__force __sum16)~tmp; | ||
| } | ||
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| #else | ||
| #include "checksum_mm.h" | ||
| #endif | ||
|
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| /* | ||
| * This is a version of ip_fast_csum() optimized for IP headers, | ||
| * which always checksum on 4 octet boundaries. | ||
| */ | ||
| static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl) | ||
| { | ||
| unsigned int sum = 0; | ||
| unsigned long tmp; | ||
|
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| __asm__ ("subqw #1,%2\n" | ||
| "1:\t" | ||
| "movel %1@+,%3\n\t" | ||
| "addxl %3,%0\n\t" | ||
| "dbra %2,1b\n\t" | ||
| "movel %0,%3\n\t" | ||
| "swap %3\n\t" | ||
| "addxw %3,%0\n\t" | ||
| "clrw %3\n\t" | ||
| "addxw %3,%0\n\t" | ||
| : "=d" (sum), "=&a" (iph), "=&d" (ihl), "=&d" (tmp) | ||
| : "0" (sum), "1" (iph), "2" (ihl) | ||
| : "memory"); | ||
| return (__force __sum16)~sum; | ||
| } | ||
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| static inline __sum16 csum_fold(__wsum sum) | ||
| { | ||
| unsigned int tmp = (__force u32)sum; | ||
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| __asm__("swap %1\n\t" | ||
| "addw %1, %0\n\t" | ||
| "clrw %1\n\t" | ||
| "addxw %1, %0" | ||
| : "=&d" (sum), "=&d" (tmp) | ||
| : "0" (sum), "1" (tmp)); | ||
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| return (__force __sum16)~sum; | ||
| } | ||
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| #endif /* CONFIG_COLDFIRE */ | ||
|
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| static inline __wsum | ||
| csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, | ||
| unsigned short proto, __wsum sum) | ||
| { | ||
| __asm__ ("addl %2,%0\n\t" | ||
| "addxl %3,%0\n\t" | ||
| "addxl %4,%0\n\t" | ||
| "clrl %1\n\t" | ||
| "addxl %1,%0" | ||
| : "=&d" (sum), "=d" (saddr) | ||
| : "g" (daddr), "1" (saddr), "d" (len + proto), | ||
| "0" (sum)); | ||
| return sum; | ||
| } | ||
|
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|
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| /* | ||
| * computes the checksum of the TCP/UDP pseudo-header | ||
| * returns a 16-bit checksum, already complemented | ||
| */ | ||
| static inline __sum16 | ||
| csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len, | ||
| unsigned short proto, __wsum sum) | ||
| { | ||
| return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum)); | ||
| } | ||
|
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| /* | ||
| * this routine is used for miscellaneous IP-like checksums, mainly | ||
| * in icmp.c | ||
| */ | ||
|
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| static inline __sum16 ip_compute_csum(const void *buff, int len) | ||
| { | ||
| return csum_fold (csum_partial(buff, len, 0)); | ||
| } | ||
|
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| #define _HAVE_ARCH_IPV6_CSUM | ||
| static __inline__ __sum16 | ||
| csum_ipv6_magic(const struct in6_addr *saddr, const struct in6_addr *daddr, | ||
| __u32 len, unsigned short proto, __wsum sum) | ||
| { | ||
| register unsigned long tmp; | ||
| __asm__("addl %2@,%0\n\t" | ||
| "movel %2@(4),%1\n\t" | ||
| "addxl %1,%0\n\t" | ||
| "movel %2@(8),%1\n\t" | ||
| "addxl %1,%0\n\t" | ||
| "movel %2@(12),%1\n\t" | ||
| "addxl %1,%0\n\t" | ||
| "movel %3@,%1\n\t" | ||
| "addxl %1,%0\n\t" | ||
| "movel %3@(4),%1\n\t" | ||
| "addxl %1,%0\n\t" | ||
| "movel %3@(8),%1\n\t" | ||
| "addxl %1,%0\n\t" | ||
| "movel %3@(12),%1\n\t" | ||
| "addxl %1,%0\n\t" | ||
| "addxl %4,%0\n\t" | ||
| "clrl %1\n\t" | ||
| "addxl %1,%0" | ||
| : "=&d" (sum), "=&d" (tmp) | ||
| : "a" (saddr), "a" (daddr), "d" (len + proto), | ||
| "0" (sum)); | ||
|
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| return csum_fold(sum); | ||
| } | ||
|
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| #endif /* _M68K_CHECKSUM_H */ |
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