Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  Copyright (C) 2005-2007 Jiri Slaby <jirislaby@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  You need a userspace library to cooperate with this driver. It (and other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *  info) may be obtained here:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *  http://www.fi.muni.cz/~xslaby/phantom.html
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *  or alternatively, you might use OpenHaptics provided by Sensable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/cdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/phantom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define PHANTOM_VERSION		"n0.9.8"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define PHANTOM_MAX_MINORS	8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define PHN_IRQCTL		0x4c    /* irq control in caddr space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define PHB_RUNNING		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define PHB_NOT_OH		2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) static DEFINE_MUTEX(phantom_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static struct class *phantom_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static int phantom_major;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) struct phantom_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	unsigned int opened;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	void __iomem *caddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	u32 __iomem *iaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	u32 __iomem *oaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	unsigned long status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	atomic_t counter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	wait_queue_head_t wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct cdev cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	struct mutex open_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	spinlock_t regs_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	/* used in NOT_OH mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	struct phm_regs oregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	u32 ctl_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) static unsigned char phantom_devices[PHANTOM_MAX_MINORS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static int phantom_status(struct phantom_device *dev, unsigned long newstat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	pr_debug("phantom_status %lx %lx\n", dev->status, newstat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (!(dev->status & PHB_RUNNING) && (newstat & PHB_RUNNING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		atomic_set(&dev->counter, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		iowrite32(PHN_CTL_IRQ, dev->iaddr + PHN_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		iowrite32(0x43, dev->caddr + PHN_IRQCTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	} else if ((dev->status & PHB_RUNNING) && !(newstat & PHB_RUNNING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		iowrite32(0, dev->caddr + PHN_IRQCTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	dev->status = newstat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82)  * File ops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) static long phantom_ioctl(struct file *file, unsigned int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	struct phantom_device *dev = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	struct phm_regs rs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	struct phm_reg r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	void __user *argp = (void __user *)arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	case PHN_SETREG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	case PHN_SET_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		if (copy_from_user(&r, argp, sizeof(r)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		if (r.reg > 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		spin_lock_irqsave(&dev->regs_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		if (r.reg == PHN_CONTROL && (r.value & PHN_CTL_IRQ) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 				phantom_status(dev, dev->status | PHB_RUNNING)){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 			spin_unlock_irqrestore(&dev->regs_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 			return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		pr_debug("phantom: writing %x to %u\n", r.value, r.reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		/* preserve amp bit (don't allow to change it when in NOT_OH) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		if (r.reg == PHN_CONTROL && (dev->status & PHB_NOT_OH)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 			r.value &= ~PHN_CTL_AMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			r.value |= dev->ctl_reg & PHN_CTL_AMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 			dev->ctl_reg = r.value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		iowrite32(r.value, dev->iaddr + r.reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		ioread32(dev->iaddr); /* PCI posting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		if (r.reg == PHN_CONTROL && !(r.value & PHN_CTL_IRQ))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			phantom_status(dev, dev->status & ~PHB_RUNNING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		spin_unlock_irqrestore(&dev->regs_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	case PHN_SETREGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	case PHN_SET_REGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		if (copy_from_user(&rs, argp, sizeof(rs)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		pr_debug("phantom: SRS %u regs %x\n", rs.count, rs.mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		spin_lock_irqsave(&dev->regs_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		if (dev->status & PHB_NOT_OH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			memcpy(&dev->oregs, &rs, sizeof(rs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			u32 m = min(rs.count, 8U);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			for (i = 0; i < m; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 				if (rs.mask & BIT(i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 					iowrite32(rs.values[i], dev->oaddr + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			ioread32(dev->iaddr); /* PCI posting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		spin_unlock_irqrestore(&dev->regs_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	case PHN_GETREG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	case PHN_GET_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		if (copy_from_user(&r, argp, sizeof(r)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		if (r.reg > 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		r.value = ioread32(dev->iaddr + r.reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		if (copy_to_user(argp, &r, sizeof(r)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	case PHN_GETREGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	case PHN_GET_REGS: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		u32 m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		if (copy_from_user(&rs, argp, sizeof(rs)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		m = min(rs.count, 8U);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		pr_debug("phantom: GRS %u regs %x\n", rs.count, rs.mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		spin_lock_irqsave(&dev->regs_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		for (i = 0; i < m; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			if (rs.mask & BIT(i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 				rs.values[i] = ioread32(dev->iaddr + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		atomic_set(&dev->counter, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		spin_unlock_irqrestore(&dev->regs_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		if (copy_to_user(argp, &rs, sizeof(rs)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	} case PHN_NOT_OH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		spin_lock_irqsave(&dev->regs_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		if (dev->status & PHB_RUNNING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			printk(KERN_ERR "phantom: you need to set NOT_OH "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 					"before you start the device!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			spin_unlock_irqrestore(&dev->regs_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		dev->status |= PHB_NOT_OH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		spin_unlock_irqrestore(&dev->regs_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		return -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static long phantom_compat_ioctl(struct file *filp, unsigned int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	if (_IOC_NR(cmd) <= 3 && _IOC_SIZE(cmd) == sizeof(compat_uptr_t)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		cmd &= ~(_IOC_SIZEMASK << _IOC_SIZESHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		cmd |= sizeof(void *) << _IOC_SIZESHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	return phantom_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) #define phantom_compat_ioctl NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static int phantom_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	struct phantom_device *dev = container_of(inode->i_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 			struct phantom_device, cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	mutex_lock(&phantom_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	nonseekable_open(inode, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	if (mutex_lock_interruptible(&dev->open_lock)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		mutex_unlock(&phantom_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	if (dev->opened) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		mutex_unlock(&dev->open_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		mutex_unlock(&phantom_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	WARN_ON(dev->status & PHB_NOT_OH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	file->private_data = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	atomic_set(&dev->counter, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	dev->opened++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	mutex_unlock(&dev->open_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	mutex_unlock(&phantom_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static int phantom_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	struct phantom_device *dev = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	mutex_lock(&dev->open_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	dev->opened = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	phantom_status(dev, dev->status & ~PHB_RUNNING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	dev->status &= ~PHB_NOT_OH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	mutex_unlock(&dev->open_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static __poll_t phantom_poll(struct file *file, poll_table *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	struct phantom_device *dev = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	__poll_t mask = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	pr_debug("phantom_poll: %d\n", atomic_read(&dev->counter));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	poll_wait(file, &dev->wait, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	if (!(dev->status & PHB_RUNNING))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		mask = EPOLLERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	else if (atomic_read(&dev->counter))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		mask = EPOLLIN | EPOLLRDNORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	pr_debug("phantom_poll end: %x/%d\n", mask, atomic_read(&dev->counter));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	return mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) static const struct file_operations phantom_file_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	.open = phantom_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	.release = phantom_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	.unlocked_ioctl = phantom_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	.compat_ioctl = phantom_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	.poll = phantom_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	.llseek = no_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static irqreturn_t phantom_isr(int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	struct phantom_device *dev = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	u32 ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	spin_lock(&dev->regs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	ctl = ioread32(dev->iaddr + PHN_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	if (!(ctl & PHN_CTL_IRQ)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		spin_unlock(&dev->regs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	iowrite32(0, dev->iaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	iowrite32(0xc0, dev->iaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	if (dev->status & PHB_NOT_OH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		struct phm_regs *r = &dev->oregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		u32 m = min(r->count, 8U);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		for (i = 0; i < m; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 			if (r->mask & BIT(i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 				iowrite32(r->values[i], dev->oaddr + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		dev->ctl_reg ^= PHN_CTL_AMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 		iowrite32(dev->ctl_reg, dev->iaddr + PHN_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	spin_unlock(&dev->regs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	ioread32(dev->iaddr); /* PCI posting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	atomic_inc(&dev->counter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	wake_up_interruptible(&dev->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)  * Init and deinit driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) static unsigned int phantom_get_free(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	for (i = 0; i < PHANTOM_MAX_MINORS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		if (phantom_devices[i] == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) static int phantom_probe(struct pci_dev *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	const struct pci_device_id *pci_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	struct phantom_device *pht;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	unsigned int minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	retval = pci_enable_device(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 		dev_err(&pdev->dev, "pci_enable_device failed!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	minor = phantom_get_free();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	if (minor == PHANTOM_MAX_MINORS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		dev_err(&pdev->dev, "too many devices found!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		retval = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		goto err_dis;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	phantom_devices[minor] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	retval = pci_request_regions(pdev, "phantom");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 		dev_err(&pdev->dev, "pci_request_regions failed!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 		goto err_null;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	retval = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	pht = kzalloc(sizeof(*pht), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	if (pht == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		dev_err(&pdev->dev, "unable to allocate device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		goto err_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	pht->caddr = pci_iomap(pdev, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	if (pht->caddr == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 		dev_err(&pdev->dev, "can't remap conf space\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 		goto err_fr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	pht->iaddr = pci_iomap(pdev, 2, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	if (pht->iaddr == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 		dev_err(&pdev->dev, "can't remap input space\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 		goto err_unmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	pht->oaddr = pci_iomap(pdev, 3, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	if (pht->oaddr == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 		dev_err(&pdev->dev, "can't remap output space\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 		goto err_unmi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	mutex_init(&pht->open_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	spin_lock_init(&pht->regs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	init_waitqueue_head(&pht->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	cdev_init(&pht->cdev, &phantom_file_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	pht->cdev.owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	iowrite32(0, pht->caddr + PHN_IRQCTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	retval = request_irq(pdev->irq, phantom_isr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 			IRQF_SHARED, "phantom", pht);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 		dev_err(&pdev->dev, "can't establish ISR\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 		goto err_unmo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	retval = cdev_add(&pht->cdev, MKDEV(phantom_major, minor), 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 		dev_err(&pdev->dev, "chardev registration failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 		goto err_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	if (IS_ERR(device_create(phantom_class, &pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 				 MKDEV(phantom_major, minor), NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 				 "phantom%u", minor)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 		dev_err(&pdev->dev, "can't create device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	pci_set_drvdata(pdev, pht);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) err_irq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	free_irq(pdev->irq, pht);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) err_unmo:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	pci_iounmap(pdev, pht->oaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) err_unmi:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	pci_iounmap(pdev, pht->iaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) err_unmc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	pci_iounmap(pdev, pht->caddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) err_fr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 	kfree(pht);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) err_reg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	pci_release_regions(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) err_null:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	phantom_devices[minor] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) err_dis:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	pci_disable_device(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 	return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) static void phantom_remove(struct pci_dev *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 	struct phantom_device *pht = pci_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	unsigned int minor = MINOR(pht->cdev.dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	device_destroy(phantom_class, MKDEV(phantom_major, minor));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 	cdev_del(&pht->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	iowrite32(0, pht->caddr + PHN_IRQCTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	free_irq(pdev->irq, pht);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 	pci_iounmap(pdev, pht->oaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	pci_iounmap(pdev, pht->iaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 	pci_iounmap(pdev, pht->caddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 	kfree(pht);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 	pci_release_regions(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 	phantom_devices[minor] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 	pci_disable_device(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) static int __maybe_unused phantom_suspend(struct device *dev_d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	struct phantom_device *dev = dev_get_drvdata(dev_d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	iowrite32(0, dev->caddr + PHN_IRQCTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 	ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 	synchronize_irq(to_pci_dev(dev_d)->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) static int __maybe_unused phantom_resume(struct device *dev_d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 	struct phantom_device *dev = dev_get_drvdata(dev_d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 	iowrite32(0, dev->caddr + PHN_IRQCTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) static struct pci_device_id phantom_pci_tbl[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 	{ .vendor = PCI_VENDOR_ID_PLX, .device = PCI_DEVICE_ID_PLX_9050,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 	  .subvendor = PCI_VENDOR_ID_PLX, .subdevice = PCI_DEVICE_ID_PLX_9050,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 	  .class = PCI_CLASS_BRIDGE_OTHER << 8, .class_mask = 0xffff00 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 	{ 0, }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) MODULE_DEVICE_TABLE(pci, phantom_pci_tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) static SIMPLE_DEV_PM_OPS(phantom_pm_ops, phantom_suspend, phantom_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) static struct pci_driver phantom_pci_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 	.name = "phantom",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 	.id_table = phantom_pci_tbl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 	.probe = phantom_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 	.remove = phantom_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) 	.driver.pm = &phantom_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) static CLASS_ATTR_STRING(version, 0444, PHANTOM_VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) static int __init phantom_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) 	int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) 	dev_t dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 	phantom_class = class_create(THIS_MODULE, "phantom");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 	if (IS_ERR(phantom_class)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) 		retval = PTR_ERR(phantom_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 		printk(KERN_ERR "phantom: can't register phantom class\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) 	retval = class_create_file(phantom_class, &class_attr_version.attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) 	if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 		printk(KERN_ERR "phantom: can't create sysfs version file\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) 		goto err_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) 	retval = alloc_chrdev_region(&dev, 0, PHANTOM_MAX_MINORS, "phantom");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) 	if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) 		printk(KERN_ERR "phantom: can't register character device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) 		goto err_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) 	phantom_major = MAJOR(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) 	retval = pci_register_driver(&phantom_pci_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) 	if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) 		printk(KERN_ERR "phantom: can't register pci driver\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) 		goto err_unchr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) 	printk(KERN_INFO "Phantom Linux Driver, version " PHANTOM_VERSION ", "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) 			"init OK\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) err_unchr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) 	unregister_chrdev_region(dev, PHANTOM_MAX_MINORS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) err_attr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) 	class_remove_file(phantom_class, &class_attr_version.attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) err_class:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) 	class_destroy(phantom_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) 	return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) static void __exit phantom_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) 	pci_unregister_driver(&phantom_pci_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) 	unregister_chrdev_region(MKDEV(phantom_major, 0), PHANTOM_MAX_MINORS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) 	class_remove_file(phantom_class, &class_attr_version.attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) 	class_destroy(phantom_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) 	pr_debug("phantom: module successfully removed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) module_init(phantom_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) module_exit(phantom_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) MODULE_AUTHOR("Jiri Slaby <jirislaby@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) MODULE_DESCRIPTION("Sensable Phantom driver (PCI devices)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) MODULE_VERSION(PHANTOM_VERSION);