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can-calc-bit-timing: use "struct can_bittiming_const" from uapi headers 

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
pull/17/head
Marc Kleine-Budde 2016-04-12 15:56:14 +02:00
parent bc41784773
commit 9ae9e7da02
1 changed files with 249 additions and 288 deletions
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537
can-calc-bit-timing.c
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@ -24,6 +24,7 @@
#include <string.h> #include <string.h>
#include <linux/types.h> #include <linux/types.h>
#include <linux/can/netlink.h>
/* seems not to be defined in errno.h */ /* seems not to be defined in errno.h */
#ifndef ENOTSUPP #ifndef ENOTSUPP
@ -66,54 +67,13 @@
typedef __u64 u64; typedef __u64 u64;
typedef __u32 u32; typedef __u32 u32;
struct calc_bittiming_const {
struct can_bittiming_const bittiming_const;
/*
* CAN bit-timing parameters
*
* For futher information, please read chapter "8 BIT TIMING
* REQUIREMENTS" of the "Bosch CAN Specification version 2.0"
* at http://www.semiconductors.bosch.de/pdf/can2spec.pdf.
*/
struct can_bittiming {
__u32 bitrate; /* Bit-rate in bits/second */
__u32 sample_point; /* Sample point in one-tenth of a percent */
__u32 tq; /* Time quanta (TQ) in nanoseconds */
__u32 prop_seg; /* Propagation segment in TQs */
__u32 phase_seg1; /* Phase buffer segment 1 in TQs */
__u32 phase_seg2; /* Phase buffer segment 2 in TQs */
__u32 sjw; /* Synchronisation jump width in TQs */
__u32 brp; /* Bit-rate prescaler */
};
/*
* CAN harware-dependent bit-timing constant
*
* Used for calculating and checking bit-timing parameters
*/
struct can_bittiming_const {
char name[16]; /* Name of the CAN controller hardware */
__u32 tseg1_min; /* Time segement 1 = prop_seg + phase_seg1 */
__u32 tseg1_max;
__u32 tseg2_min; /* Time segement 2 = phase_seg2 */
__u32 tseg2_max;
__u32 sjw_max; /* Synchronisation jump width */
__u32 brp_min; /* Bit-rate prescaler */
__u32 brp_max;
__u32 brp_inc;
/* added for can-calc-bit-timing utility */
__u32 ref_clk; /* CAN system clock frequency in Hz */ __u32 ref_clk; /* CAN system clock frequency in Hz */
void (*printf_btr)(struct can_bittiming *bt, bool hdr); void (*printf_btr)(struct can_bittiming *bt, bool hdr);
}; };
/*
* CAN clock parameters
*/
struct can_clock {
__u32 freq; /* CAN system clock frequency in Hz */
};
/* /*
* minimal structs, just enough to be source level compatible * minimal structs, just enough to be source level compatible
*/ */
@ -241,285 +201,286 @@ static void printf_btr_rcar_can(struct can_bittiming *bt, bool hdr)
} }
} }
static struct can_bittiming_const can_calc_consts[] = { static struct calc_bittiming_const can_calc_consts[] = {
{ {
.name = "sja1000", .bittiming_const = {
.tseg1_min = 1, .name = "sja1000",
.tseg1_max = 16, .tseg1_min = 1,
.tseg2_min = 1, .tseg1_max = 16,
.tseg2_max = 8, .tseg2_min = 1,
.sjw_max = 4, .tseg2_max = 8,
.brp_min = 1, .sjw_max = 4,
.brp_max = 64, .brp_min = 1,
.brp_inc = 1, .brp_max = 64,
.brp_inc = 1,
},
.ref_clk = 8000000, .ref_clk = 8000000,
.printf_btr = printf_btr_sja1000, .printf_btr = printf_btr_sja1000,
}, }, {
{ .bittiming_const = {
.name = "mscan", .name = "mscan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 64, .brp_max = 64,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 32000000, .ref_clk = 32000000,
.printf_btr = printf_btr_sja1000, .printf_btr = printf_btr_sja1000,
}, }, {
{ .bittiming_const = {
.name = "mscan", .name = "mscan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 64, .brp_max = 64,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 33000000, .ref_clk = 33000000,
.printf_btr = printf_btr_sja1000, .printf_btr = printf_btr_sja1000,
}, }, {
{ .bittiming_const = {
.name = "mscan", .name = "mscan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 64, .brp_max = 64,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 33300000, .ref_clk = 33300000,
.printf_btr = printf_btr_sja1000, .printf_btr = printf_btr_sja1000,
}, }, {
{ .bittiming_const = {
.name = "mscan", .name = "mscan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 64, .brp_max = 64,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 33333333, .ref_clk = 33333333,
.printf_btr = printf_btr_sja1000, .printf_btr = printf_btr_sja1000,
}, }, {
{ .bittiming_const = {
.name = "mscan", .name = "mscan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 64, .brp_max = 64,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 66660000, /* mpc5121 */ .ref_clk = 66660000, /* mpc5121 */
.printf_btr = printf_btr_sja1000, .printf_btr = printf_btr_sja1000,
}, }, {
{ .bittiming_const = {
.name = "mscan", .name = "mscan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 64, .brp_max = 64,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 66666666, /* mpc5121 */ .ref_clk = 66666666, /* mpc5121 */
.printf_btr = printf_btr_sja1000, .printf_btr = printf_btr_sja1000,
}, }, {
{ .bittiming_const = {
.name = "at91", .name = "at91",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 2, .brp_min = 2,
.brp_max = 128, .brp_max = 128,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 100000000, .ref_clk = 100000000,
.printf_btr = printf_btr_at91, .printf_btr = printf_btr_at91,
}, }, {
{ .bittiming_const = {
.name = "at91", .name = "at91",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 2, .brp_min = 2,
.brp_max = 128, .brp_max = 128,
.brp_inc = 1, .brp_inc = 1,
},
/* real world clock as found on the ronetix PM9263 */ /* real world clock as found on the ronetix PM9263 */
.ref_clk = 99532800, .ref_clk = 99532800,
.printf_btr = printf_btr_at91, .printf_btr = printf_btr_at91,
}, }, {
{ .bittiming_const = {
.name = "flexcan", .name = "flexcan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 256, .brp_max = 256,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 24000000, /* mx28 */ .ref_clk = 24000000, /* mx28 */
.printf_btr = printf_btr_flexcan, .printf_btr = printf_btr_flexcan,
}, }, {
{ .bittiming_const = {
.name = "flexcan", .name = "flexcan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 256, .brp_max = 256,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 30000000, /* mx6 */ .ref_clk = 30000000, /* mx6 */
.printf_btr = printf_btr_flexcan, .printf_btr = printf_btr_flexcan,
}, }, {
{ .bittiming_const = {
.name = "flexcan", .name = "flexcan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 256, .brp_max = 256,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 49875000, .ref_clk = 49875000,
.printf_btr = printf_btr_flexcan, .printf_btr = printf_btr_flexcan,
}, }, {
{ .bittiming_const = {
.name = "flexcan", .name = "flexcan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 256, .brp_max = 256,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 66000000, .ref_clk = 66000000,
.printf_btr = printf_btr_flexcan, .printf_btr = printf_btr_flexcan,
}, }, {
{ .bittiming_const = {
.name = "flexcan", .name = "flexcan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 256, .brp_max = 256,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 66500000, .ref_clk = 66500000,
.printf_btr = printf_btr_flexcan, .printf_btr = printf_btr_flexcan,
}, }, {
{ .bittiming_const = {
.name = "flexcan", .name = "flexcan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 256, .brp_max = 256,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 66666666, .ref_clk = 66666666,
.printf_btr = printf_btr_flexcan, .printf_btr = printf_btr_flexcan,
}, }, {
{ .bittiming_const = {
.name = "flexcan", .name = "flexcan",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 256, .brp_max = 256,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 83368421, .ref_clk = 83368421,
.printf_btr = printf_btr_flexcan, /* vybrid */ .printf_btr = printf_btr_flexcan, /* vybrid */
}, }, {
{ .bittiming_const = {
.name = "mcp251x", .name = "mcp251x",
.tseg1_min = 3, .tseg1_min = 3,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 64, .brp_max = 64,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 8000000, .ref_clk = 8000000,
.printf_btr = printf_btr_mcp251x, .printf_btr = printf_btr_mcp251x,
}, }, {
{ .bittiming_const = {
.name = "mcp251x", .name = "mcp251x",
.tseg1_min = 3, .tseg1_min = 3,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 64, .brp_max = 64,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 16000000, .ref_clk = 16000000,
.printf_btr = printf_btr_mcp251x, .printf_btr = printf_btr_mcp251x,
}, }, {
{ .bittiming_const = {
.name = "ti_hecc", .name = "ti_hecc",
.tseg1_min = 1, .tseg1_min = 1,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 1, .tseg2_min = 1,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 256, .brp_max = 256,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 13000000, .ref_clk = 13000000,
.printf_btr = printf_btr_ti_hecc, .printf_btr = printf_btr_ti_hecc,
}, }, {
{ .bittiming_const = {
.name = "rcar_can", .name = "rcar_can",
.tseg1_min = 4, .tseg1_min = 4,
.tseg1_max = 16, .tseg1_max = 16,
.tseg2_min = 2, .tseg2_min = 2,
.tseg2_max = 8, .tseg2_max = 8,
.sjw_max = 4, .sjw_max = 4,
.brp_min = 1, .brp_min = 1,
.brp_max = 1024, .brp_max = 1024,
.brp_inc = 1, .brp_inc = 1,
},
.ref_clk = 65000000, .ref_clk = 65000000,
.printf_btr = printf_btr_rcar_can, .printf_btr = printf_btr_rcar_can,
}, },
@ -662,12 +623,12 @@ static __u32 get_cia_sample_point(__u32 bitrate)
return sampl_pt; return sampl_pt;
} }
static void print_bit_timing(const struct can_bittiming_const *btc, static void print_bit_timing(const struct calc_bittiming_const *btc,
__u32 bitrate, __u32 sample_point, __u32 ref_clk, __u32 bitrate, __u32 sample_point, __u32 ref_clk,
bool quiet) bool quiet)
{ {
struct net_device dev = { struct net_device dev = {
.priv.bittiming_const = btc, .priv.bittiming_const = &btc->bittiming_const,
.priv.clock.freq = ref_clk, .priv.clock.freq = ref_clk,
}; };
struct can_bittiming bt = { struct can_bittiming bt = {
@ -680,7 +641,7 @@ static void print_bit_timing(const struct can_bittiming_const *btc,
printf("Bit timing parameters for %s with %.6f MHz ref clock\n" printf("Bit timing parameters for %s with %.6f MHz ref clock\n"
"nominal real Bitrt nom real SampP\n" "nominal real Bitrt nom real SampP\n"
"Bitrate TQ[ns] PrS PhS1 PhS2 SJW BRP Bitrate Error SampP SampP Error ", "Bitrate TQ[ns] PrS PhS1 PhS2 SJW BRP Bitrate Error SampP SampP Error ",
btc->name, btc->bittiming_const.name,
ref_clk / 1000000.0); ref_clk / 1000000.0);
btc->printf_btr(&bt, true); btc->printf_btr(&bt, true);
@ -724,7 +685,7 @@ static void do_list(void)
unsigned int i; unsigned int i;
for (i = 0; i < ARRAY_SIZE(can_calc_consts); i++) for (i = 0; i < ARRAY_SIZE(can_calc_consts); i++)
printf("%s\n", can_calc_consts[i].name); printf("%s\n", can_calc_consts[i].bittiming_const.name);
} }
int main(int argc, char *argv[]) int main(int argc, char *argv[])
@ -737,7 +698,7 @@ int main(int argc, char *argv[])
unsigned int i, j; unsigned int i, j;
int opt; int opt;
const struct can_bittiming_const *btc = NULL; const struct calc_bittiming_const *btc = NULL;
while ((opt = getopt(argc, argv, "b:c:lps:")) != -1) { while ((opt = getopt(argc, argv, "b:c:lps:")) != -1) {
switch (opt) { switch (opt) {
@ -782,7 +743,7 @@ int main(int argc, char *argv[])
print_usage(argv[0]); print_usage(argv[0]);
for (i = 0; i < ARRAY_SIZE(can_calc_consts); i++) { for (i = 0; i < ARRAY_SIZE(can_calc_consts); i++) {
if (name && strcmp(can_calc_consts[i].name, name)) if (name && strcmp(can_calc_consts[i].bittiming_const.name, name))
continue; continue;
found = true; found = true;