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path: root/drivers/ptp/ptp_chardev.c
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Diffstat (limited to 'drivers/ptp/ptp_chardev.c')
-rw-r--r--drivers/ptp/ptp_chardev.c128
1 files changed, 127 insertions, 1 deletions
diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c
index 34a0c607318e..419056d7887e 100644
--- a/drivers/ptp/ptp_chardev.c
+++ b/drivers/ptp/ptp_chardev.c
@@ -25,6 +25,96 @@
25 25
26#include "ptp_private.h" 26#include "ptp_private.h"
27 27
28static int ptp_disable_pinfunc(struct ptp_clock_info *ops,
29 enum ptp_pin_function func, unsigned int chan)
30{
31 struct ptp_clock_request rq;
32 int err = 0;
33
34 memset(&rq, 0, sizeof(rq));
35
36 switch (func) {
37 case PTP_PF_NONE:
38 break;
39 case PTP_PF_EXTTS:
40 rq.type = PTP_CLK_REQ_EXTTS;
41 rq.extts.index = chan;
42 err = ops->enable(ops, &rq, 0);
43 break;
44 case PTP_PF_PEROUT:
45 rq.type = PTP_CLK_REQ_PEROUT;
46 rq.perout.index = chan;
47 err = ops->enable(ops, &rq, 0);
48 break;
49 case PTP_PF_PHYSYNC:
50 break;
51 default:
52 return -EINVAL;
53 }
54
55 return err;
56}
57
58int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
59 enum ptp_pin_function func, unsigned int chan)
60{
61 struct ptp_clock_info *info = ptp->info;
62 struct ptp_pin_desc *pin1 = NULL, *pin2 = &info->pin_config[pin];
63 unsigned int i;
64
65 /* Check to see if any other pin previously had this function. */
66 for (i = 0; i < info->n_pins; i++) {
67 if (info->pin_config[i].func == func &&
68 info->pin_config[i].chan == chan) {
69 pin1 = &info->pin_config[i];
70 break;
71 }
72 }
73 if (pin1 && i == pin)
74 return 0;
75
76 /* Check the desired function and channel. */
77 switch (func) {
78 case PTP_PF_NONE:
79 break;
80 case PTP_PF_EXTTS:
81 if (chan >= info->n_ext_ts)
82 return -EINVAL;
83 break;
84 case PTP_PF_PEROUT:
85 if (chan >= info->n_per_out)
86 return -EINVAL;
87 break;
88 case PTP_PF_PHYSYNC:
89 pr_err("sorry, cannot reassign the calibration pin\n");
90 return -EINVAL;
91 default:
92 return -EINVAL;
93 }
94
95 if (pin2->func == PTP_PF_PHYSYNC) {
96 pr_err("sorry, cannot reprogram the calibration pin\n");
97 return -EINVAL;
98 }
99
100 if (info->verify(info, pin, func, chan)) {
101 pr_err("driver cannot use function %u on pin %u\n", func, chan);
102 return -EOPNOTSUPP;
103 }
104
105 /* Disable whatever function was previously assigned. */
106 if (pin1) {
107 ptp_disable_pinfunc(info, func, chan);
108 pin1->func = PTP_PF_NONE;
109 pin1->chan = 0;
110 }
111 ptp_disable_pinfunc(info, pin2->func, pin2->chan);
112 pin2->func = func;
113 pin2->chan = chan;
114
115 return 0;
116}
117
28int ptp_open(struct posix_clock *pc, fmode_t fmode) 118int ptp_open(struct posix_clock *pc, fmode_t fmode)
29{ 119{
30 return 0; 120 return 0;
@@ -35,12 +125,13 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
35 struct ptp_clock_caps caps; 125 struct ptp_clock_caps caps;
36 struct ptp_clock_request req; 126 struct ptp_clock_request req;
37 struct ptp_sys_offset *sysoff = NULL; 127 struct ptp_sys_offset *sysoff = NULL;
128 struct ptp_pin_desc pd;
38 struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock); 129 struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
39 struct ptp_clock_info *ops = ptp->info; 130 struct ptp_clock_info *ops = ptp->info;
40 struct ptp_clock_time *pct; 131 struct ptp_clock_time *pct;
41 struct timespec ts; 132 struct timespec ts;
42 int enable, err = 0; 133 int enable, err = 0;
43 unsigned int i; 134 unsigned int i, pin_index;
44 135
45 switch (cmd) { 136 switch (cmd) {
46 137
@@ -51,6 +142,7 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
51 caps.n_ext_ts = ptp->info->n_ext_ts; 142 caps.n_ext_ts = ptp->info->n_ext_ts;
52 caps.n_per_out = ptp->info->n_per_out; 143 caps.n_per_out = ptp->info->n_per_out;
53 caps.pps = ptp->info->pps; 144 caps.pps = ptp->info->pps;
145 caps.n_pins = ptp->info->n_pins;
54 if (copy_to_user((void __user *)arg, &caps, sizeof(caps))) 146 if (copy_to_user((void __user *)arg, &caps, sizeof(caps)))
55 err = -EFAULT; 147 err = -EFAULT;
56 break; 148 break;
@@ -126,6 +218,40 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
126 err = -EFAULT; 218 err = -EFAULT;
127 break; 219 break;
128 220
221 case PTP_PIN_GETFUNC:
222 if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
223 err = -EFAULT;
224 break;
225 }
226 pin_index = pd.index;
227 if (pin_index >= ops->n_pins) {
228 err = -EINVAL;
229 break;
230 }
231 if (mutex_lock_interruptible(&ptp->pincfg_mux))
232 return -ERESTARTSYS;
233 pd = ops->pin_config[pin_index];
234 mutex_unlock(&ptp->pincfg_mux);
235 if (!err && copy_to_user((void __user *)arg, &pd, sizeof(pd)))
236 err = -EFAULT;
237 break;
238
239 case PTP_PIN_SETFUNC:
240 if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
241 err = -EFAULT;
242 break;
243 }
244 pin_index = pd.index;
245 if (pin_index >= ops->n_pins) {
246 err = -EINVAL;
247 break;
248 }
249 if (mutex_lock_interruptible(&ptp->pincfg_mux))
250 return -ERESTARTSYS;
251 err = ptp_set_pinfunc(ptp, pin_index, pd.func, pd.chan);
252 mutex_unlock(&ptp->pincfg_mux);
253 break;
254
129 default: 255 default:
130 err = -ENOTTY; 256 err = -ENOTTY;
131 break; 257 break;