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path: root/drivers/pcmcia/i82092.c
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Diffstat (limited to 'drivers/pcmcia/i82092.c')
-rw-r--r--drivers/pcmcia/i82092.c678
1 files changed, 678 insertions, 0 deletions
diff --git a/drivers/pcmcia/i82092.c b/drivers/pcmcia/i82092.c
new file mode 100644
index 000000000..192c9049d
--- /dev/null
+++ b/drivers/pcmcia/i82092.c
@@ -0,0 +1,678 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for Intel I82092AA PCI-PCMCIA bridge.
+ *
+ * (C) 2001 Red Hat, Inc.
+ *
+ * Author: Arjan Van De Ven <arjanv@redhat.com>
+ * Loosly based on i82365.c from the pcmcia-cs package
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/workqueue.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+
+#include <pcmcia/ss.h>
+
+#include <linux/io.h>
+
+#include "i82092aa.h"
+#include "i82365.h"
+
+MODULE_LICENSE("GPL");
+
+/* PCI core routines */
+static const struct pci_device_id i82092aa_pci_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82092AA_0) },
+ { }
+};
+MODULE_DEVICE_TABLE(pci, i82092aa_pci_ids);
+
+static struct pci_driver i82092aa_pci_driver = {
+ .name = "i82092aa",
+ .id_table = i82092aa_pci_ids,
+ .probe = i82092aa_pci_probe,
+ .remove = i82092aa_pci_remove,
+};
+
+
+/* the pccard structure and its functions */
+static struct pccard_operations i82092aa_operations = {
+ .init = i82092aa_init,
+ .get_status = i82092aa_get_status,
+ .set_socket = i82092aa_set_socket,
+ .set_io_map = i82092aa_set_io_map,
+ .set_mem_map = i82092aa_set_mem_map,
+};
+
+/* The card can do up to 4 sockets, allocate a structure for each of them */
+
+struct socket_info {
+ int number;
+ int card_state;
+ /* 0 = no socket,
+ * 1 = empty socket,
+ * 2 = card but not initialized,
+ * 3 = operational card
+ */
+ unsigned int io_base; /* base io address of the socket */
+
+ struct pcmcia_socket socket;
+ struct pci_dev *dev; /* The PCI device for the socket */
+};
+
+#define MAX_SOCKETS 4
+static struct socket_info sockets[MAX_SOCKETS];
+static int socket_count; /* shortcut */
+
+
+static int i82092aa_pci_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
+{
+ unsigned char configbyte;
+ int i, ret;
+
+ ret = pci_enable_device(dev);
+ if (ret)
+ return ret;
+
+ /* PCI Configuration Control */
+ pci_read_config_byte(dev, 0x40, &configbyte);
+
+ switch (configbyte&6) {
+ case 0:
+ socket_count = 2;
+ break;
+ case 2:
+ socket_count = 1;
+ break;
+ case 4:
+ case 6:
+ socket_count = 4;
+ break;
+
+ default:
+ dev_err(&dev->dev,
+ "Oops, you did something we didn't think of.\n");
+ ret = -EIO;
+ goto err_out_disable;
+ }
+ dev_info(&dev->dev, "configured as a %d socket device.\n",
+ socket_count);
+
+ if (!request_region(pci_resource_start(dev, 0), 2, "i82092aa")) {
+ ret = -EBUSY;
+ goto err_out_disable;
+ }
+
+ for (i = 0; i < socket_count; i++) {
+ sockets[i].card_state = 1; /* 1 = present but empty */
+ sockets[i].io_base = pci_resource_start(dev, 0);
+ sockets[i].dev = dev;
+ sockets[i].socket.features |= SS_CAP_PCCARD;
+ sockets[i].socket.map_size = 0x1000;
+ sockets[i].socket.irq_mask = 0;
+ sockets[i].socket.pci_irq = dev->irq;
+ sockets[i].socket.cb_dev = dev;
+ sockets[i].socket.owner = THIS_MODULE;
+
+ sockets[i].number = i;
+
+ if (card_present(i)) {
+ sockets[i].card_state = 3;
+ dev_dbg(&dev->dev, "slot %i is occupied\n", i);
+ } else {
+ dev_dbg(&dev->dev, "slot %i is vacant\n", i);
+ }
+ }
+
+ /* Now, specifiy that all interrupts are to be done as PCI interrupts
+ * bitmask, one bit per event, 1 = PCI interrupt, 0 = ISA interrupt
+ */
+ configbyte = 0xFF;
+
+ /* PCI Interrupt Routing Register */
+ pci_write_config_byte(dev, 0x50, configbyte);
+
+ /* Register the interrupt handler */
+ dev_dbg(&dev->dev, "Requesting interrupt %i\n", dev->irq);
+ ret = request_irq(dev->irq, i82092aa_interrupt, IRQF_SHARED,
+ "i82092aa", i82092aa_interrupt);
+ if (ret) {
+ dev_err(&dev->dev, "Failed to register IRQ %d, aborting\n",
+ dev->irq);
+ goto err_out_free_res;
+ }
+
+ for (i = 0; i < socket_count; i++) {
+ sockets[i].socket.dev.parent = &dev->dev;
+ sockets[i].socket.ops = &i82092aa_operations;
+ sockets[i].socket.resource_ops = &pccard_nonstatic_ops;
+ ret = pcmcia_register_socket(&sockets[i].socket);
+ if (ret)
+ goto err_out_free_sockets;
+ }
+
+ return 0;
+
+err_out_free_sockets:
+ if (i) {
+ for (i--; i >= 0; i--)
+ pcmcia_unregister_socket(&sockets[i].socket);
+ }
+ free_irq(dev->irq, i82092aa_interrupt);
+err_out_free_res:
+ release_region(pci_resource_start(dev, 0), 2);
+err_out_disable:
+ pci_disable_device(dev);
+ return ret;
+}
+
+static void i82092aa_pci_remove(struct pci_dev *dev)
+{
+ int i;
+
+ free_irq(dev->irq, i82092aa_interrupt);
+
+ for (i = 0; i < socket_count; i++)
+ pcmcia_unregister_socket(&sockets[i].socket);
+}
+
+static DEFINE_SPINLOCK(port_lock);
+
+/* basic value read/write functions */
+
+static unsigned char indirect_read(int socket, unsigned short reg)
+{
+ unsigned short int port;
+ unsigned char val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&port_lock, flags);
+ reg += socket * 0x40;
+ port = sockets[socket].io_base;
+ outb(reg, port);
+ val = inb(port+1);
+ spin_unlock_irqrestore(&port_lock, flags);
+ return val;
+}
+
+static void indirect_write(int socket, unsigned short reg, unsigned char value)
+{
+ unsigned short int port;
+ unsigned long flags;
+
+ spin_lock_irqsave(&port_lock, flags);
+ reg = reg + socket * 0x40;
+ port = sockets[socket].io_base;
+ outb(reg, port);
+ outb(value, port+1);
+ spin_unlock_irqrestore(&port_lock, flags);
+}
+
+static void indirect_setbit(int socket, unsigned short reg, unsigned char mask)
+{
+ unsigned short int port;
+ unsigned char val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&port_lock, flags);
+ reg = reg + socket * 0x40;
+ port = sockets[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);
+}
+
+
+static void indirect_resetbit(int socket,
+ unsigned short reg, unsigned char mask)
+{
+ unsigned short int port;
+ unsigned char val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&port_lock, flags);
+ reg = reg + socket * 0x40;
+ port = sockets[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);
+}
+
+static void indirect_write16(int socket,
+ unsigned short reg, unsigned short value)
+{
+ unsigned short int port;
+ unsigned char val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&port_lock, flags);
+ reg = reg + socket * 0x40;
+ port = sockets[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);
+}
+
+/* simple helper functions */
+/* External clock time, in nanoseconds. 120 ns = 8.33 MHz */
+static int cycle_time = 120;
+
+static int to_cycles(int ns)
+{
+ if (cycle_time != 0)
+ return ns/cycle_time;
+ else
+ return 0;
+}
+
+
+/* Interrupt handler functionality */
+
+static irqreturn_t i82092aa_interrupt(int irq, void *dev)
+{
+ int i;
+ int loopcount = 0;
+ int handled = 0;
+
+ unsigned int events, active = 0;
+
+ while (1) {
+ loopcount++;
+ if (loopcount > 20) {
+ pr_err("i82092aa: infinite eventloop in interrupt\n");
+ break;
+ }
+
+ active = 0;
+
+ for (i = 0; i < socket_count; i++) {
+ int csc;
+
+ /* Inactive socket, should not happen */
+ if (sockets[i].card_state == 0)
+ continue;
+
+ /* card status change register */
+ csc = indirect_read(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_info(&sockets[i].dev->dev,
+ "Card detected in socket %i!\n", i);
+ }
+
+ if (indirect_read(i, I365_INTCTL) & I365_PC_IOCARD) {
+ /* For IO/CARDS, bit 0 means "read the card" */
+ if (csc & I365_CSC_STSCHG)
+ events |= SS_STSCHG;
+ } else {
+ /* Check for battery/ready events */
+ if (csc & I365_CSC_BVD1)
+ events |= SS_BATDEAD;
+ if (csc & I365_CSC_BVD2)
+ events |= SS_BATWARN;
+ if (csc & I365_CSC_READY)
+ events |= SS_READY;
+ }
+
+ if (events)
+ pcmcia_parse_events(&sockets[i].socket, events);
+ active |= events;
+ }
+
+ if (active == 0) /* no more events to handle */
+ break;
+ }
+ return IRQ_RETVAL(handled);
+}
+
+
+
+/* socket functions */
+
+static int card_present(int socketno)
+{
+ unsigned int val;
+
+ if ((socketno < 0) || (socketno >= MAX_SOCKETS))
+ return 0;
+ if (sockets[socketno].io_base == 0)
+ return 0;
+
+
+ val = indirect_read(socketno, 1); /* Interface status register */
+ if ((val&12) == 12)
+ return 1;
+
+ return 0;
+}
+
+static void set_bridge_state(int sock)
+{
+ indirect_write(sock, I365_GBLCTL, 0x00);
+ indirect_write(sock, I365_GENCTL, 0x00);
+
+ indirect_setbit(sock, I365_INTCTL, 0x08);
+}
+
+
+static int i82092aa_init(struct pcmcia_socket *sock)
+{
+ int i;
+ struct resource res = { .start = 0, .end = 0x0fff };
+ pccard_io_map io = { 0, 0, 0, 0, 1 };
+ pccard_mem_map mem = { .res = &res, };
+
+ for (i = 0; i < 2; i++) {
+ io.map = i;
+ i82092aa_set_io_map(sock, &io);
+ }
+ for (i = 0; i < 5; i++) {
+ mem.map = i;
+ i82092aa_set_mem_map(sock, &mem);
+ }
+
+ return 0;
+}
+
+static int i82092aa_get_status(struct pcmcia_socket *socket, u_int *value)
+{
+ unsigned int sock = container_of(socket,
+ struct socket_info, socket)->number;
+ unsigned int status;
+
+ /* Interface Status Register */
+ status = indirect_read(sock, 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(sock, 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 */
+
+ return 0;
+}
+
+
+static int i82092aa_set_socket(struct pcmcia_socket *socket,
+ socket_state_t *state)
+{
+ struct socket_info *sock_info = container_of(socket, struct socket_info,
+ socket);
+ unsigned int sock = sock_info->number;
+ unsigned char reg;
+
+ /* First, set the global controller options */
+
+ set_bridge_state(sock);
+
+ /* Values for the IGENC register */
+
+ reg = 0;
+
+ /* The reset bit has "inverse" logic */
+ if (!(state->flags & SS_RESET))
+ reg = reg | I365_PC_RESET;
+ if (state->flags & SS_IOCARD)
+ reg = reg | I365_PC_IOCARD;
+
+ /* IGENC, Interrupt and General Control Register */
+ indirect_write(sock, I365_INTCTL, reg);
+
+ /* Power registers */
+
+ reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
+
+ if (state->flags & SS_PWR_AUTO) {
+ dev_info(&sock_info->dev->dev, "Auto power\n");
+ reg |= I365_PWR_AUTO; /* automatic power mngmnt */
+ }
+ if (state->flags & SS_OUTPUT_ENA) {
+ dev_info(&sock_info->dev->dev, "Power Enabled\n");
+ reg |= I365_PWR_OUT; /* enable power */
+ }
+
+ switch (state->Vcc) {
+ case 0:
+ break;
+ case 50:
+ dev_info(&sock_info->dev->dev,
+ "setting voltage to Vcc to 5V on socket %i\n",
+ sock);
+ reg |= I365_VCC_5V;
+ break;
+ default:
+ dev_err(&sock_info->dev->dev,
+ "%s called with invalid VCC power value: %i",
+ __func__, state->Vcc);
+ return -EINVAL;
+ }
+
+ switch (state->Vpp) {
+ case 0:
+ dev_info(&sock_info->dev->dev,
+ "not setting Vpp on socket %i\n", sock);
+ break;
+ case 50:
+ dev_info(&sock_info->dev->dev,
+ "setting Vpp to 5.0 for socket %i\n", sock);
+ reg |= I365_VPP1_5V | I365_VPP2_5V;
+ break;
+ case 120:
+ dev_info(&sock_info->dev->dev, "setting Vpp to 12.0\n");
+ reg |= I365_VPP1_12V | I365_VPP2_12V;
+ break;
+ default:
+ dev_err(&sock_info->dev->dev,
+ "%s called with invalid VPP power value: %i",
+ __func__, state->Vcc);
+ return -EINVAL;
+ }
+
+ if (reg != indirect_read(sock, I365_POWER)) /* only write if changed */
+ indirect_write(sock, I365_POWER, reg);
+
+ /* 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;
+
+ }
+
+ /* now write the value and clear the (probably bogus) pending stuff
+ * by doing a dummy read
+ */
+
+ indirect_write(sock, I365_CSCINT, reg);
+ (void)indirect_read(sock, I365_CSC);
+
+ return 0;
+}
+
+static int i82092aa_set_io_map(struct pcmcia_socket *socket,
+ struct pccard_io_map *io)
+{
+ struct socket_info *sock_info = container_of(socket, struct socket_info,
+ socket);
+ unsigned int sock = sock_info->number;
+ unsigned char map, ioctl;
+
+ map = io->map;
+
+ /* Check error conditions */
+ if (map > 1)
+ return -EINVAL;
+
+ if ((io->start > 0xffff) || (io->stop > 0xffff)
+ || (io->stop < io->start))
+ return -EINVAL;
+
+ /* Turn off the window before changing anything */
+ if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_IO(map))
+ indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
+
+ /* write the new values */
+ indirect_write16(sock, I365_IO(map)+I365_W_START, io->start);
+ indirect_write16(sock, I365_IO(map)+I365_W_STOP, io->stop);
+
+ ioctl = indirect_read(sock, I365_IOCTL) & ~I365_IOCTL_MASK(map);
+
+ if (io->flags & (MAP_16BIT|MAP_AUTOSZ))
+ ioctl |= I365_IOCTL_16BIT(map);
+
+ indirect_write(sock, I365_IOCTL, ioctl);
+
+ /* Turn the window back on if needed */
+ if (io->flags & MAP_ACTIVE)
+ indirect_setbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
+
+ return 0;
+}
+
+static int i82092aa_set_mem_map(struct pcmcia_socket *socket,
+ struct pccard_mem_map *mem)
+{
+ struct socket_info *sock_info = container_of(socket, struct socket_info,
+ socket);
+ unsigned int sock = sock_info->number;
+ struct pci_bus_region region;
+ unsigned short base, i;
+ unsigned char map;
+
+ pcibios_resource_to_bus(sock_info->dev->bus, &region, mem->res);
+
+ map = mem->map;
+ if (map > 4)
+ return -EINVAL;
+
+ if ((mem->card_start > 0x3ffffff) || (region.start > region.end) ||
+ (mem->speed > 1000)) {
+ dev_err(&sock_info->dev->dev,
+ "invalid mem map for socket %i: %llx to %llx with a start of %x\n",
+ sock,
+ (unsigned long long)region.start,
+ (unsigned long long)region.end,
+ mem->card_start);
+ return -EINVAL;
+ }
+
+ /* Turn off the window before changing anything */
+ if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_MEM(map))
+ indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
+
+ /* write the start address */
+ base = I365_MEM(map);
+ i = (region.start >> 12) & 0x0fff;
+ if (mem->flags & MAP_16BIT)
+ i |= I365_MEM_16BIT;
+ if (mem->flags & MAP_0WS)
+ i |= I365_MEM_0WS;
+ indirect_write16(sock, base+I365_W_START, i);
+
+ /* write the stop address */
+
+ i = (region.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(sock, base+I365_W_STOP, i);
+
+ /* card start */
+
+ i = ((mem->card_start - region.start) >> 12) & 0x3fff;
+ if (mem->flags & MAP_WRPROT)
+ i |= I365_MEM_WRPROT;
+ if (mem->flags & MAP_ATTRIB)
+ i |= I365_MEM_REG;
+ indirect_write16(sock, base+I365_W_OFF, i);
+
+ /* Enable the window if necessary */
+ if (mem->flags & MAP_ACTIVE)
+ indirect_setbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
+
+ return 0;
+}
+
+static int i82092aa_module_init(void)
+{
+ return pci_register_driver(&i82092aa_pci_driver);
+}
+
+static void i82092aa_module_exit(void)
+{
+ pci_unregister_driver(&i82092aa_pci_driver);
+ if (sockets[0].io_base > 0)
+ release_region(sockets[0].io_base, 2);
+}
+
+module_init(i82092aa_module_init);
+module_exit(i82092aa_module_exit);
+
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