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Release 4.14 drivers/pcmcia/pd6729.c

Directory: drivers/pcmcia
/*
 * Driver for the Cirrus PD6729 PCI-PCMCIA bridge.
 *
 * Based on the i82092.c driver.
 *
 * This software may be used and distributed according to the terms of
 * the GNU General Public License, incorporated herein by reference.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/io.h>

#include <pcmcia/ss.h>


#include "pd6729.h"
#include "i82365.h"
#include "cirrus.h"

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Driver for the Cirrus PD6729 PCI-PCMCIA bridge");
MODULE_AUTHOR("Jun Komuro <komurojun-mbn@nifty.com>");


#define MAX_SOCKETS 2

/*
 * simple helper functions
 * External clock time, in nanoseconds.  120 ns = 8.33 MHz
 */

#define to_cycles(ns)	((ns)/120)

#ifndef NO_IRQ

#define NO_IRQ	((unsigned int)(0))
#endif

/*
 * PARAMETERS
 *  irq_mode=n
 *     Specifies the interrupt delivery mode.  The default (1) is to use PCI
 *     interrupts; a value of 0 selects ISA interrupts. This must be set for
 *     correct operation of PCI card readers.
 */


static int irq_mode = 1; 
/* 0 = ISA interrupt, 1 = PCI interrupt */

module_param(irq_mode, int, 0444);
MODULE_PARM_DESC(irq_mode,
		"interrupt delivery mode. 0 = ISA, 1 = PCI. default is 1");

static DEFINE_SPINLOCK(port_lock);

/* basic value read/write functions */


static unsigned char indirect_read(struct pd6729_socket *socket, unsigned short reg) { unsigned long port; unsigned char val; unsigned long flags; spin_lock_irqsave(&port_lock, flags); reg += socket->number * 0x40; port = socket->io_base; outb(reg, port); val = inb(port + 1); spin_unlock_irqrestore(&port_lock, flags); return val; }

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static unsigned short indirect_read16(struct pd6729_socket *socket, unsigned short reg) { unsigned long port; unsigned short tmp; unsigned long flags; spin_lock_irqsave(&port_lock, flags); reg = reg + socket->number * 0x40; port = socket->io_base; outb(reg, port); tmp = inb(port + 1); reg++; outb(reg, port); tmp = tmp | (inb(port + 1) << 8); spin_unlock_irqrestore(&port_lock, flags); return tmp; }

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static void indirect_write(struct pd6729_socket *socket, unsigned short reg, unsigned char value) { unsigned long port; unsigned long flags; spin_lock_irqsave(&port_lock, flags); reg = reg + socket->number * 0x40; port = socket->io_base; outb(reg, port); outb(value, port + 1); spin_unlock_irqrestore(&port_lock, flags); }

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static void indirect_setbit(struct pd6729_socket *socket, unsigned short reg, unsigned char mask) { unsigned long port; unsigned char val; unsigned long flags; spin_lock_irqsave(&port_lock, flags); reg = reg + socket->number * 0x40; port = socket->io_base; outb(reg, port); val = inb(port + 1); val |= mask; outb(reg, port); outb(val, port + 1); spin_unlock_irqrestore(&port_lock, flags); }

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static void indirect_resetbit(struct pd6729_socket *socket, unsigned short reg, unsigned char mask) { unsigned long port; unsigned char val; unsigned long flags; spin_lock_irqsave(&port_lock, flags); reg = reg + socket->number * 0x40; port = socket->io_base; outb(reg, port); val = inb(port + 1); val &= ~mask; outb(reg, port); outb(val, port + 1); spin_unlock_irqrestore(&port_lock, flags); }

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static void indirect_write16(struct pd6729_socket *socket, unsigned short reg, unsigned short value) { unsigned long port; unsigned char val; unsigned long flags; spin_lock_irqsave(&port_lock, flags); reg = reg + socket->number * 0x40; port = socket->io_base; outb(reg, port); val = value & 255; outb(val, port + 1); reg++; outb(reg, port); val = value >> 8; outb(val, port + 1); spin_unlock_irqrestore(&port_lock, flags); }

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/* Interrupt handler functionality */
static irqreturn_t pd6729_interrupt(int irq, void *dev) { struct pd6729_socket *socket = (struct pd6729_socket *)dev; int i; int loopcount = 0; int handled = 0; unsigned int events, active = 0; while (1) { loopcount++; if (loopcount > 20) { printk(KERN_ERR "pd6729: infinite eventloop " "in interrupt\n"); break; } active = 0; for (i = 0; i < MAX_SOCKETS; i++) { unsigned int csc; /* card status change register */ csc = indirect_read(&socket[i], I365_CSC); if (csc == 0) /* no events on this socket */ continue; handled = 1; events = 0; if (csc & I365_CSC_DETECT) { events |= SS_DETECT; dev_vdbg(&socket[i].socket.dev, "Card detected in socket %i!\n", i); } if (indirect_read(&socket[i], I365_INTCTL) & I365_PC_IOCARD) { /* For IO/CARDS, bit 0 means "read the card" */ events |= (csc & I365_CSC_STSCHG) ? SS_STSCHG : 0; } else { /* Check for battery/ready events */ events |= (csc & I365_CSC_BVD1) ? SS_BATDEAD : 0; events |= (csc & I365_CSC_BVD2) ? SS_BATWARN : 0; events |= (csc & I365_CSC_READY) ? SS_READY : 0; } if (events) pcmcia_parse_events(&socket[i].socket, events); active |= events; } if (active == 0) /* no more events to handle */ break; } return IRQ_RETVAL(handled); }

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/* socket functions */
static void pd6729_interrupt_wrapper(unsigned long data) { struct pd6729_socket *socket = (struct pd6729_socket *) data; pd6729_interrupt(0, (void *)socket); mod_timer(&socket->poll_timer, jiffies + HZ); }

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static int pd6729_get_status(struct pcmcia_socket *sock, u_int *value) { struct pd6729_socket *socket = container_of(sock, struct pd6729_socket, socket); unsigned int status; unsigned int data; struct pd6729_socket *t; /* Interface Status Register */ status = indirect_read(socket, I365_STATUS); *value = 0; if ((status & I365_CS_DETECT) == I365_CS_DETECT) *value |= SS_DETECT; /* * IO cards have a different meaning of bits 0,1 * Also notice the inverse-logic on the bits */ if (indirect_read(socket, I365_INTCTL) & I365_PC_IOCARD) { /* IO card */ if (!(status & I365_CS_STSCHG)) *value |= SS_STSCHG; } else { /* non I/O card */ if (!(status & I365_CS_BVD1)) *value |= SS_BATDEAD; if (!(status & I365_CS_BVD2)) *value |= SS_BATWARN; } if (status & I365_CS_WRPROT) *value |= SS_WRPROT; /* card is write protected */ if (status & I365_CS_READY) *value |= SS_READY; /* card is not busy */ if (status & I365_CS_POWERON) *value |= SS_POWERON; /* power is applied to the card */ t = (socket->number) ? socket : socket + 1; indirect_write(t, PD67_EXT_INDEX, PD67_EXTERN_DATA); data = indirect_read16(t, PD67_EXT_DATA); *value |= (data & PD67_EXD_VS1(socket->number)) ? 0 : SS_3VCARD; return 0; }

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static int pd6729_set_socket(struct pcmcia_socket *sock, socket_state_t *state) { struct pd6729_socket *socket = container_of(sock, struct pd6729_socket, socket); unsigned char reg, data; /* First, set the global controller options */ indirect_write(socket, I365_GBLCTL, 0x00); indirect_write(socket, I365_GENCTL, 0x00); /* Values for the IGENC register */ socket->card_irq = state->io_irq; reg = 0; /* The reset bit has "inverse" logic */ if (!(state->flags & SS_RESET)) reg |= I365_PC_RESET; if (state->flags & SS_IOCARD) reg |= I365_PC_IOCARD; /* IGENC, Interrupt and General Control Register */ indirect_write(socket, I365_INTCTL, reg); /* Power registers */ reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */ if (state->flags & SS_PWR_AUTO) { dev_dbg(&sock->dev, "Auto power\n"); reg |= I365_PWR_AUTO; /* automatic power mngmnt */ } if (state->flags & SS_OUTPUT_ENA) { dev_dbg(&sock->dev, "Power Enabled\n"); reg |= I365_PWR_OUT; /* enable power */ } switch (state->Vcc) { case 0: break; case 33: dev_dbg(&sock->dev, "setting voltage to Vcc to 3.3V on socket %i\n", socket->number); reg |= I365_VCC_5V; indirect_setbit(socket, PD67_MISC_CTL_1, PD67_MC1_VCC_3V); break; case 50: dev_dbg(&sock->dev, "setting voltage to Vcc to 5V on socket %i\n", socket->number); reg |= I365_VCC_5V; indirect_resetbit(socket, PD67_MISC_CTL_1, PD67_MC1_VCC_3V); break; default: dev_dbg(&sock->dev, "pd6729_set_socket called with invalid VCC power " "value: %i\n", state->Vcc); return -EINVAL; } switch (state->Vpp) { case 0: dev_dbg(&sock->dev, "not setting Vpp on socket %i\n", socket->number); break; case 33: case 50: dev_dbg(&sock->dev, "setting Vpp to Vcc for socket %i\n", socket->number); reg |= I365_VPP1_5V; break; case 120: dev_dbg(&sock->dev, "setting Vpp to 12.0\n"); reg |= I365_VPP1_12V; break; default: dev_dbg(&sock->dev, "pd6729: pd6729_set_socket called with " "invalid VPP power value: %i\n", state->Vpp); return -EINVAL; } /* only write if changed */ if (reg != indirect_read(socket, I365_POWER)) indirect_write(socket, I365_POWER, reg); if (irq_mode == 1) { /* all interrupts are to be done as PCI interrupts */ data = PD67_EC1_INV_MGMT_IRQ | PD67_EC1_INV_CARD_IRQ; } else data = 0; indirect_write(socket, PD67_EXT_INDEX, PD67_EXT_CTL_1); indirect_write(socket, PD67_EXT_DATA, data); /* Enable specific interrupt events */ reg = 0x00; if (state->csc_mask & SS_DETECT) reg |= I365_CSC_DETECT; if (state->flags & SS_IOCARD) { if (state->csc_mask & SS_STSCHG) reg |= I365_CSC_STSCHG; } else { if (state->csc_mask & SS_BATDEAD) reg |= I365_CSC_BVD1; if (state->csc_mask & SS_BATWARN) reg |= I365_CSC_BVD2; if (state->csc_mask & SS_READY) reg |= I365_CSC_READY; } if (irq_mode == 1) reg |= 0x30; /* management IRQ: PCI INTA# = "irq 3" */ indirect_write(socket, I365_CSCINT, reg); reg = indirect_read(socket, I365_INTCTL); if (irq_mode == 1) reg |= 0x03; /* card IRQ: PCI INTA# = "irq 3" */ else reg |= socket->card_irq; indirect_write(socket, I365_INTCTL, reg); /* now clear the (probably bogus) pending stuff by doing a dummy read */ (void)indirect_read(socket, I365_CSC); return 0; }

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static int pd6729_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *io) { struct pd6729_socket *socket = container_of(sock, struct pd6729_socket, socket); unsigned char map, ioctl; map = io->map; /* Check error conditions */ if (map > 1) { dev_dbg(&sock->dev, "pd6729_set_io_map with invalid map\n"); return -EINVAL; } /* Turn off the window before changing anything */ if (indirect_read(socket, I365_ADDRWIN) & I365_ENA_IO(map)) indirect_resetbit(socket, I365_ADDRWIN, I365_ENA_IO(map)); /* dev_dbg(&sock->dev, "set_io_map: Setting range to %x - %x\n", io->start, io->stop);*/ /* write the new values */ indirect_write16(socket, I365_IO(map)+I365_W_START, io->start); indirect_write16(socket, I365_IO(map)+I365_W_STOP, io->stop); ioctl = indirect_read(socket, I365_IOCTL) & ~I365_IOCTL_MASK(map); if (io->flags & MAP_0WS) ioctl |= I365_IOCTL_0WS(map); if (io->flags & MAP_16BIT) ioctl |= I365_IOCTL_16BIT(map); if (io->flags & MAP_AUTOSZ) ioctl |= I365_IOCTL_IOCS16(map); indirect_write(socket, I365_IOCTL, ioctl); /* Turn the window back on if needed */ if (io->flags & MAP_ACTIVE) indirect_setbit(socket, I365_ADDRWIN, I365_ENA_IO(map)); return 0; }

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static int pd6729_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *mem) { struct pd6729_socket *socket = container_of(sock, struct pd6729_socket, socket); unsigned short base, i; unsigned char map; map = mem->map; if (map > 4) { dev_warn(&sock->dev, "invalid map requested\n"); return -EINVAL; } if ((mem->res->start > mem->res->end) || (mem->speed > 1000)) { dev_warn(&sock->dev, "invalid invalid address / speed\n"); return -EINVAL; } /* Turn off the window before changing anything */ if (indirect_read(socket, I365_ADDRWIN) & I365_ENA_MEM(map)) indirect_resetbit(socket, I365_ADDRWIN, I365_ENA_MEM(map)); /* write the start address */ base = I365_MEM(map); i = (mem->res->start >> 12) & 0x0fff; if (mem->flags & MAP_16BIT) i |= I365_MEM_16BIT; if (mem->flags & MAP_0WS) i |= I365_MEM_0WS; indirect_write16(socket, base + I365_W_START, i); /* write the stop address */ i = (mem->res->end >> 12) & 0x0fff; switch (to_cycles(mem->speed)) { case 0: break; case 1: i |= I365_MEM_WS0; break; case 2: i |= I365_MEM_WS1; break; default: i |= I365_MEM_WS1 | I365_MEM_WS0; break; } indirect_write16(socket, base + I365_W_STOP, i); /* Take care of high byte */ indirect_write(socket, PD67_EXT_INDEX, PD67_MEM_PAGE(map)); indirect_write(socket, PD67_EXT_DATA, mem->res->start >> 24); /* card start */ i = ((mem->card_start - mem->res->start) >> 12) & 0x3fff; if (mem->flags & MAP_WRPROT) i |= I365_MEM_WRPROT; if (mem->flags & MAP_ATTRIB) { /* dev_dbg(&sock->dev, "requesting attribute memory for " "socket %i\n", socket->number);*/ i |= I365_MEM_REG; } else { /* dev_dbg(&sock->dev, "requesting normal memory for " "socket %i\n", socket->number);*/ } indirect_write16(socket, base + I365_W_OFF, i); /* Enable the window if necessary */ if (mem->flags & MAP_ACTIVE) indirect_setbit(socket, I365_ADDRWIN, I365_ENA_MEM(map)); return 0; }

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static int pd6729_init(struct pcmcia_socket *sock) { int i; struct resource res = { .end = 0x0fff }; pccard_io_map io = { 0, 0, 0, 0, 1 }; pccard_mem_map mem = { .res = &res, }; pd6729_set_socket(sock, &dead_socket); for (i = 0; i < 2; i++) { io.map = i; pd6729_set_io_map(sock, &io); } for (i = 0; i < 5; i++) { mem.map = i; pd6729_set_mem_map(sock, &mem); } return 0; }

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/* the pccard structure and its functions */ static struct pccard_operations pd6729_operations = { .init = pd6729_init, .get_status = pd6729_get_status, .set_socket = pd6729_set_socket, .set_io_map = pd6729_set_io_map, .set_mem_map = pd6729_set_mem_map, };
static irqreturn_t pd6729_test(int irq, void *dev) { pr_devel("-> hit on irq %d\n", irq); return IRQ_HANDLED; }

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static int pd6729_check_irq(int irq) { int ret; ret = request_irq(irq, pd6729_test, IRQF_PROBE_SHARED, "x", pd6729_test); if (ret) return -1; free_irq(irq, pd6729_test); return 0; }

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static u_int pd6729_isa_scan(void) { u_int mask0, mask = 0; int i; if (irq_mode == 1) { printk(KERN_INFO "pd6729: PCI card interrupts, " "PCI status changes\n"); return 0; } mask0 = PD67_MASK; /* just find interrupts that aren't in use */ for (i = 0; i < 16; i++) if ((mask0 & (1 << i)) && (pd6729_check_irq(i) == 0)) mask |= (1 << i); printk(KERN_INFO "pd6729: ISA irqs = "); for (i = 0; i < 16; i++) if (mask & (1<<i)) printk("%s%d", ((mask & ((1<<i)-1)) ? "," : ""), i); if (mask == 0) printk("none!"); else printk(" polling status changes.\n"); return mask; }

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static int pd6729_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) { int i, j, ret; u_int mask; char configbyte; struct pd6729_socket *socket; socket = kzalloc(sizeof(struct pd6729_socket) * MAX_SOCKETS, GFP_KERNEL); if (!socket) { dev_warn(&dev->dev, "failed to kzalloc socket.\n"); return -ENOMEM; } ret = pci_enable_device(dev); if (ret) { dev_warn(&dev->dev, "failed to enable pci_device.\n"); goto err_out_free_mem; } if (!pci_resource_start(dev, 0)) { dev_warn(&dev->dev, "refusing to load the driver as the " "io_base is NULL.\n"); ret = -ENOMEM; goto err_out_disable; } dev_info(&dev->dev, "Cirrus PD6729 PCI to PCMCIA Bridge at 0x%llx " "on irq %d\n", (unsigned long long)pci_resource_start(dev, 0), dev->irq); /* * Since we have no memory BARs some firmware may not * have had PCI_COMMAND_MEMORY enabled, yet the device needs it. */ pci_read_config_byte(dev, PCI_COMMAND, &configbyte); if (!(configbyte & PCI_COMMAND_MEMORY)) { dev_dbg(&dev->dev, "pd6729: Enabling PCI_COMMAND_MEMORY.\n"); configbyte |= PCI_COMMAND_MEMORY; pci_write_config_byte(dev, PCI_COMMAND, configbyte); } ret = pci_request_regions(dev, "pd6729"); if (ret) { dev_warn(&dev->dev, "pci request region failed.\n"); goto err_out_disable; } if (dev->irq == NO_IRQ) irq_mode = 0; /* fall back to ISA interrupt mode */ mask = pd6729_isa_scan(); if (irq_mode == 0 && mask == 0) { dev_warn(&dev->dev, "no ISA interrupt is available.\n"); ret = -ENODEV; goto err_out_free_res; } for (i = 0; i < MAX_SOCKETS; i++) { socket[i].io_base = pci_resource_start(dev, 0); socket[i].socket.features |= SS_CAP_PAGE_REGS | SS_CAP_PCCARD; socket[i].socket.map_size = 0x1000; socket[i].socket.irq_mask = mask; socket[i].socket.pci_irq = dev->irq; socket[i].socket.cb_dev = dev; socket[i].socket.owner = THIS_MODULE; socket[i].number = i; socket[i].socket.ops = &pd6729_operations; socket[i].socket.resource_ops = &pccard_nonstatic_ops; socket[i].socket.dev.parent = &dev->dev; socket[i].socket.driver_data = &socket[i]; } pci_set_drvdata(dev, socket); if (irq_mode == 1) { /* Register the interrupt handler */ ret = request_irq(dev->irq, pd6729_interrupt, IRQF_SHARED, "pd6729", socket); if (ret) { dev_err(&dev->dev, "Failed to register irq %d\n", dev->irq); goto err_out_free_res; } } else { /* poll Card status change */ setup_timer(&socket->poll_timer, pd6729_interrupt_wrapper, (unsigned long)socket); mod_timer(&socket->poll_timer, jiffies + HZ); } for (i = 0; i < MAX_SOCKETS; i++) { ret = pcmcia_register_socket(&socket[i].socket); if (ret) { dev_warn(&dev->dev, "pcmcia_register_socket failed.\n"); for (j = 0; j < i ; j++) pcmcia_unregister_socket(&socket[j].socket); goto err_out_free_res2; } } return 0; err_out_free_res2: if (irq_mode == 1) free_irq(dev->irq, socket); else del_timer_sync(&socket->poll_timer); err_out_free_res: pci_release_regions(dev); err_out_disable: pci_disable_device(dev); err_out_free_mem: kfree(socket); return ret; }

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Jun Komuro497.53%212.50%
Wei Yongjun101.54%16.25%
Vaishali Thakkar81.23%16.25%
Greg Kroah-Hartman60.92%212.50%
Thomas Gleixner10.15%16.25%
Rahul Ruikar10.15%16.25%
Total651100.00%16100.00%


static void pd6729_pci_remove(struct pci_dev *dev) { int i; struct pd6729_socket *socket = pci_get_drvdata(dev); for (i = 0; i < MAX_SOCKETS; i++) { /* Turn off all interrupt sources */ indirect_write(&socket[i], I365_CSCINT, 0); indirect_write(&socket[i], I365_INTCTL, 0); pcmcia_unregister_socket(&socket[i].socket); } if (irq_mode == 1) free_irq(dev->irq, socket); else del_timer_sync(&socket->poll_timer); pci_release_regions(dev); pci_disable_device(dev); kfree(socket); }

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static const struct pci_device_id pd6729_pci_ids[] = { { PCI_DEVICE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6729) }, { } }; MODULE_DEVICE_TABLE(pci, pd6729_pci_ids); static struct pci_driver pd6729_pci_driver = { .name = "pd6729", .id_table = pd6729_pci_ids, .probe = pd6729_pci_probe, .remove = pd6729_pci_remove, }; module_pci_driver(pd6729_pci_driver);

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Jun Komuro631.77%413.33%
Greg Kroah-Hartman120.34%310.00%
Wei Yongjun100.28%13.33%
Vaishali Thakkar80.23%13.33%
Axel Lin70.20%13.33%
Thomas Gleixner50.14%26.67%
Tejun Heo30.08%13.33%
Libo Chen20.06%13.33%
Sam Ravnborg10.03%13.33%
Rahul Ruikar10.03%13.33%
Total3551100.00%30100.00%
Directory: drivers/pcmcia
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