Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Intel(R) Trace Hub PTI output driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2014-2016 Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/sizes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/printk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include "intel_th.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include "pti.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) struct pti_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	void __iomem		*base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	struct intel_th_device	*thdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	unsigned int		mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	unsigned int		freeclk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	unsigned int		clkdiv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	unsigned int		patgen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	unsigned int		lpp_dest_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	unsigned int		lpp_dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) /* map PTI widths to MODE settings of PTI_CTL register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) static const unsigned int pti_mode[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	0, 4, 8, 0, 12, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static int pti_width_mode(unsigned int width)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	for (i = 0; i < ARRAY_SIZE(pti_mode); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		if (pti_mode[i] == width)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 			return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) static ssize_t mode_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 			 char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	struct pti_device *pti = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	return scnprintf(buf, PAGE_SIZE, "%d\n", pti_mode[pti->mode]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static ssize_t mode_store(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 			  const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	struct pti_device *pti = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	ret = kstrtoul(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	ret = pti_width_mode(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	pti->mode = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) static DEVICE_ATTR_RW(mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) freerunning_clock_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		       char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	struct pti_device *pti = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	return scnprintf(buf, PAGE_SIZE, "%d\n", pti->freeclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) freerunning_clock_store(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	struct pti_device *pti = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	ret = kstrtoul(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	pti->freeclk = !!val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static DEVICE_ATTR_RW(freerunning_clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) clock_divider_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		   char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	struct pti_device *pti = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	return scnprintf(buf, PAGE_SIZE, "%d\n", 1u << pti->clkdiv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) clock_divider_store(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		    const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	struct pti_device *pti = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	ret = kstrtoul(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	if (!is_power_of_2(val) || val > 8 || !val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	pti->clkdiv = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static DEVICE_ATTR_RW(clock_divider);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static struct attribute *pti_output_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	&dev_attr_mode.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	&dev_attr_freerunning_clock.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	&dev_attr_clock_divider.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static struct attribute_group pti_output_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	.attrs	= pti_output_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static int intel_th_pti_activate(struct intel_th_device *thdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	struct pti_device *pti = dev_get_drvdata(&thdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	u32 ctl = PTI_EN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	if (pti->patgen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		ctl |= pti->patgen << __ffs(PTI_PATGENMODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (pti->freeclk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		ctl |= PTI_FCEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	ctl |= pti->mode << __ffs(PTI_MODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	ctl |= pti->clkdiv << __ffs(PTI_CLKDIV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	ctl |= pti->lpp_dest << __ffs(LPP_DEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	iowrite32(ctl, pti->base + REG_PTI_CTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	intel_th_trace_enable(thdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static void intel_th_pti_deactivate(struct intel_th_device *thdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	struct pti_device *pti = dev_get_drvdata(&thdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	intel_th_trace_disable(thdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	iowrite32(0, pti->base + REG_PTI_CTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static void read_hw_config(struct pti_device *pti)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	u32 ctl = ioread32(pti->base + REG_PTI_CTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	pti->mode	= (ctl & PTI_MODE) >> __ffs(PTI_MODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	pti->clkdiv	= (ctl & PTI_CLKDIV) >> __ffs(PTI_CLKDIV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	pti->freeclk	= !!(ctl & PTI_FCEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	if (!pti_mode[pti->mode])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		pti->mode = pti_width_mode(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	if (!pti->clkdiv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		pti->clkdiv = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	if (pti->thdev->output.type == GTH_LPP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		if (ctl & LPP_PTIPRESENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 			pti->lpp_dest_mask |= LPP_DEST_PTI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		if (ctl & LPP_BSSBPRESENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			pti->lpp_dest_mask |= LPP_DEST_EXI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		if (ctl & LPP_DEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 			pti->lpp_dest = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static int intel_th_pti_probe(struct intel_th_device *thdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	struct device *dev = &thdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	struct pti_device *pti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	void __iomem *base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	res = intel_th_device_get_resource(thdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	if (!res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	base = devm_ioremap(dev, res->start, resource_size(res));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	if (!base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	pti = devm_kzalloc(dev, sizeof(*pti), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	if (!pti)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	pti->thdev = thdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	pti->base = base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	read_hw_config(pti);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	dev_set_drvdata(dev, pti);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) static void intel_th_pti_remove(struct intel_th_device *thdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static struct intel_th_driver intel_th_pti_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	.probe	= intel_th_pti_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	.remove	= intel_th_pti_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	.activate	= intel_th_pti_activate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	.deactivate	= intel_th_pti_deactivate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	.attr_group	= &pti_output_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	.driver	= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		.name	= "pti",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		.owner	= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) static const char * const lpp_dest_str[] = { "pti", "exi" };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static ssize_t lpp_dest_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 			     char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	struct pti_device *pti = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	ssize_t ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	for (i = ARRAY_SIZE(lpp_dest_str) - 1; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		const char *fmt = pti->lpp_dest == i ? "[%s] " : "%s ";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		if (!(pti->lpp_dest_mask & BIT(i)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		ret += scnprintf(buf + ret, PAGE_SIZE - ret,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 				 fmt, lpp_dest_str[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		buf[ret - 1] = '\n';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static ssize_t lpp_dest_store(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 			      const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	struct pti_device *pti = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	i = sysfs_match_string(lpp_dest_str, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	if (i < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	if (!(pti->lpp_dest_mask & BIT(i)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	pti->lpp_dest = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static DEVICE_ATTR_RW(lpp_dest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) static struct attribute *lpp_output_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	&dev_attr_mode.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	&dev_attr_freerunning_clock.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	&dev_attr_clock_divider.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	&dev_attr_lpp_dest.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) static struct attribute_group lpp_output_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	.attrs	= lpp_output_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) static struct intel_th_driver intel_th_lpp_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	.probe		= intel_th_pti_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	.remove		= intel_th_pti_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	.activate	= intel_th_pti_activate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	.deactivate	= intel_th_pti_deactivate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	.attr_group	= &lpp_output_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	.driver	= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		.name	= "lpp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		.owner	= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) static int __init intel_th_pti_lpp_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	err = intel_th_driver_register(&intel_th_pti_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	err = intel_th_driver_register(&intel_th_lpp_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		intel_th_driver_unregister(&intel_th_pti_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) module_init(intel_th_pti_lpp_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static void __exit intel_th_pti_lpp_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	intel_th_driver_unregister(&intel_th_pti_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	intel_th_driver_unregister(&intel_th_lpp_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) module_exit(intel_th_pti_lpp_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) MODULE_DESCRIPTION("Intel(R) Trace Hub PTI/LPP output driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@linux.intel.com>");