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linux/drivers/pcmcia/m8xx_pcmcia.c
Amol Lad 3efa9970bd [PATCH] ioremap balanced with iounmap for drivers/pcmcia 
ioremap must be balanced by an iounmap and failing to do so can result
in a memory leak.

Signed-off-by: Amol Lad <amol@verismonetworks.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
2006-10-25 21:59:43 -04:00

1349 lines
32 KiB
C
Raw Blame History

/*
* m8xx_pcmcia.c - Linux PCMCIA socket driver for the mpc8xx series.
*
* (C) 1999-2000 Magnus Damm <damm@bitsmart.com>
* (C) 2001-2002 Montavista Software, Inc.
* <mlocke@mvista.com>
*
* Support for two slots by Cyclades Corporation
* <oliver.kurth@cyclades.de>
* Further fixes, v2.6 kernel port
* <marcelo.tosatti@cyclades.com>
*
* Some fixes, additions (C) 2005 Montavista Software, Inc.
* <vbordug@ru.mvista.com>
*
* "The ExCA standard specifies that socket controllers should provide
* two IO and five memory windows per socket, which can be independently
* configured and positioned in the host address space and mapped to
* arbitrary segments of card address space. " - David A Hinds. 1999
*
* This controller does _not_ meet the ExCA standard.
*
* m8xx pcmcia controller brief info:
* + 8 windows (attrib, mem, i/o)
* + up to two slots (SLOT_A and SLOT_B)
* + inputpins, outputpins, event and mask registers.
* - no offset register. sigh.
*
* Because of the lacking offset register we must map the whole card.
* We assign each memory window PCMCIA_MEM_WIN_SIZE address space.
* Make sure there is (PCMCIA_MEM_WIN_SIZE * PCMCIA_MEM_WIN_NO
* * PCMCIA_SOCKETS_NO) bytes at PCMCIA_MEM_WIN_BASE.
* The i/o windows are dynamically allocated at PCMCIA_IO_WIN_BASE.
* They are maximum 64KByte each...
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/string.h>
#include <asm/io.h>
#include <asm/bitops.h>
#include <asm/system.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <asm/mpc8xx.h>
#include <asm/8xx_immap.h>
#include <asm/irq.h>
#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/ss.h>
#ifdef PCMCIA_DEBUG
static int pc_debug = PCMCIA_DEBUG;
module_param(pc_debug, int, 0);
#define dprintk(args...) printk(KERN_DEBUG "m8xx_pcmcia: " args);
#else
#define dprintk(args...)
#endif
#define pcmcia_info(args...) printk(KERN_INFO "m8xx_pcmcia: "args)
#define pcmcia_error(args...) printk(KERN_ERR "m8xx_pcmcia: "args)
static const char *version = "Version 0.06, Aug 2005";
MODULE_LICENSE("Dual MPL/GPL");
#if !defined(CONFIG_PCMCIA_SLOT_A) && !defined(CONFIG_PCMCIA_SLOT_B)
/* The RPX series use SLOT_B */
#if defined(CONFIG_RPXCLASSIC) || defined(CONFIG_RPXLITE)
#define CONFIG_PCMCIA_SLOT_B
#define CONFIG_BD_IS_MHZ
#endif
/* The ADS board use SLOT_A */
#ifdef CONFIG_ADS
#define CONFIG_PCMCIA_SLOT_A
#define CONFIG_BD_IS_MHZ
#endif
/* The FADS series are a mess */
#ifdef CONFIG_FADS
#if defined(CONFIG_MPC860T) || defined(CONFIG_MPC860) || defined(CONFIG_MPC821)
#define CONFIG_PCMCIA_SLOT_A
#else
#define CONFIG_PCMCIA_SLOT_B
#endif
#endif
#if defined(CONFIG_MPC885ADS)
#define CONFIG_PCMCIA_SLOT_A
#define PCMCIA_GLITCHY_CD
#endif
/* Cyclades ACS uses both slots */
#ifdef CONFIG_PRxK
#define CONFIG_PCMCIA_SLOT_A
#define CONFIG_PCMCIA_SLOT_B
#endif
#endif /* !defined(CONFIG_PCMCIA_SLOT_A) && !defined(CONFIG_PCMCIA_SLOT_B) */
#if defined(CONFIG_PCMCIA_SLOT_A) && defined(CONFIG_PCMCIA_SLOT_B)
#define PCMCIA_SOCKETS_NO 2
/* We have only 8 windows, dualsocket support will be limited. */
#define PCMCIA_MEM_WIN_NO 2
#define PCMCIA_IO_WIN_NO 2
#define PCMCIA_SLOT_MSG "SLOT_A and SLOT_B"
#elif defined(CONFIG_PCMCIA_SLOT_A) || defined(CONFIG_PCMCIA_SLOT_B)
#define PCMCIA_SOCKETS_NO 1
/* full support for one slot */
#define PCMCIA_MEM_WIN_NO 5
#define PCMCIA_IO_WIN_NO 2
/* define _slot_ to be able to optimize macros */
#ifdef CONFIG_PCMCIA_SLOT_A
#define _slot_ 0
#define PCMCIA_SLOT_MSG "SLOT_A"
#else
#define _slot_ 1
#define PCMCIA_SLOT_MSG "SLOT_B"
#endif
#else
#error m8xx_pcmcia: Bad configuration!
#endif
/* ------------------------------------------------------------------------- */
#define PCMCIA_MEM_WIN_BASE 0xe0000000 /* base address for memory window 0 */
#define PCMCIA_MEM_WIN_SIZE 0x04000000 /* each memory window is 64 MByte */
#define PCMCIA_IO_WIN_BASE _IO_BASE /* base address for io window 0 */
#define PCMCIA_SCHLVL PCMCIA_INTERRUPT /* Status Change Interrupt Level */
/* ------------------------------------------------------------------------- */
/* 2.4.x and newer has this always in HZ */
#define M8XX_BUSFREQ ((((bd_t *)&(__res))->bi_busfreq))
static int pcmcia_schlvl = PCMCIA_SCHLVL;
static DEFINE_SPINLOCK(events_lock);
#define PCMCIA_SOCKET_KEY_5V 1
#define PCMCIA_SOCKET_KEY_LV 2
/* look up table for pgcrx registers */
static u32 *m8xx_pgcrx[2] = {
&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pgcra,
&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pgcrb
};
/*
* This structure is used to address each window in the PCMCIA controller.
*
* Keep in mind that we assume that pcmcia_win[n+1] is mapped directly
* after pcmcia_win[n]...
*/
struct pcmcia_win {
u32 br;
u32 or;
};
/*
* For some reason the hardware guys decided to make both slots share
* some registers.
*
* Could someone invent object oriented hardware ?
*
* The macros are used to get the right bit from the registers.
* SLOT_A : slot = 0
* SLOT_B : slot = 1
*/
#define M8XX_PCMCIA_VS1(slot) (0x80000000 >> (slot << 4))
#define M8XX_PCMCIA_VS2(slot) (0x40000000 >> (slot << 4))
#define M8XX_PCMCIA_VS_MASK(slot) (0xc0000000 >> (slot << 4))
#define M8XX_PCMCIA_VS_SHIFT(slot) (30 - (slot << 4))
#define M8XX_PCMCIA_WP(slot) (0x20000000 >> (slot << 4))
#define M8XX_PCMCIA_CD2(slot) (0x10000000 >> (slot << 4))
#define M8XX_PCMCIA_CD1(slot) (0x08000000 >> (slot << 4))
#define M8XX_PCMCIA_BVD2(slot) (0x04000000 >> (slot << 4))
#define M8XX_PCMCIA_BVD1(slot) (0x02000000 >> (slot << 4))
#define M8XX_PCMCIA_RDY(slot) (0x01000000 >> (slot << 4))
#define M8XX_PCMCIA_RDY_L(slot) (0x00800000 >> (slot << 4))
#define M8XX_PCMCIA_RDY_H(slot) (0x00400000 >> (slot << 4))
#define M8XX_PCMCIA_RDY_R(slot) (0x00200000 >> (slot << 4))
#define M8XX_PCMCIA_RDY_F(slot) (0x00100000 >> (slot << 4))
#define M8XX_PCMCIA_MASK(slot) (0xFFFF0000 >> (slot << 4))
#define M8XX_PCMCIA_POR_VALID 0x00000001
#define M8XX_PCMCIA_POR_WRPROT 0x00000002
#define M8XX_PCMCIA_POR_ATTRMEM 0x00000010
#define M8XX_PCMCIA_POR_IO 0x00000018
#define M8XX_PCMCIA_POR_16BIT 0x00000040
#define M8XX_PGCRX(slot) m8xx_pgcrx[slot]
#define M8XX_PGCRX_CXOE 0x00000080
#define M8XX_PGCRX_CXRESET 0x00000040
/* we keep one lookup table per socket to check flags */
#define PCMCIA_EVENTS_MAX 5 /* 4 max at a time + termination */
struct event_table {
u32 regbit;
u32 eventbit;
};
struct socket_info {
void (*handler)(void *info, u32 events);
void *info;
u32 slot;
socket_state_t state;
struct pccard_mem_map mem_win[PCMCIA_MEM_WIN_NO];
struct pccard_io_map io_win[PCMCIA_IO_WIN_NO];
struct event_table events[PCMCIA_EVENTS_MAX];
struct pcmcia_socket socket;
};
static struct socket_info socket[PCMCIA_SOCKETS_NO];
/*
* Search this table to see if the windowsize is
* supported...
*/
#define M8XX_SIZES_NO 32
static const u32 m8xx_size_to_gray[M8XX_SIZES_NO] =
{
0x00000001, 0x00000002, 0x00000008, 0x00000004,
0x00000080, 0x00000040, 0x00000010, 0x00000020,
0x00008000, 0x00004000, 0x00001000, 0x00002000,
0x00000100, 0x00000200, 0x00000800, 0x00000400,
0x0fffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0x01000000, 0x02000000, 0xffffffff, 0x04000000,
0x00010000, 0x00020000, 0x00080000, 0x00040000,
0x00800000, 0x00400000, 0x00100000, 0x00200000
};
/* ------------------------------------------------------------------------- */
static irqreturn_t m8xx_interrupt(int irq, void *dev);
#define PCMCIA_BMT_LIMIT (15*4) /* Bus Monitor Timeout value */
/* ------------------------------------------------------------------------- */
/* board specific stuff: */
/* voltage_set(), hardware_enable() and hardware_disable() */
/* ------------------------------------------------------------------------- */
/* RPX Boards from Embedded Planet */
#if defined(CONFIG_RPXCLASSIC) || defined(CONFIG_RPXLITE)
/* The RPX boards seems to have it's bus monitor timeout set to 6*8 clocks.
* SYPCR is write once only, therefore must the slowest memory be faster
* than the bus monitor or we will get a machine check due to the bus timeout.
*/
#define PCMCIA_BOARD_MSG "RPX CLASSIC or RPX LITE"
#undef PCMCIA_BMT_LIMIT
#define PCMCIA_BMT_LIMIT (6*8)
static int voltage_set(int slot, int vcc, int vpp)
{
u32 reg = 0;
switch(vcc) {
case 0: break;
case 33:
reg |= BCSR1_PCVCTL4;
break;
case 50:
reg |= BCSR1_PCVCTL5;
break;
default:
return 1;
}
switch(vpp) {
case 0: break;
case 33:
case 50:
if(vcc == vpp)
reg |= BCSR1_PCVCTL6;
else
return 1;
break;
case 120:
reg |= BCSR1_PCVCTL7;
default:
return 1;
}
if(!((vcc == 50) || (vcc == 0)))
return 1;
/* first, turn off all power */
out_be32(((u32 *)RPX_CSR_ADDR), in_be32(((u32 *)RPX_CSR_ADDR)) & ~(BCSR1_PCVCTL4 | BCSR1_PCVCTL5 | BCSR1_PCVCTL6 | BCSR1_PCVCTL7));
/* enable new powersettings */
out_be32(((u32 *)RPX_CSR_ADDR), in_be32(((u32 *)RPX_CSR_ADDR)) | reg);
return 0;
}
#define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
#define hardware_enable(_slot_) /* No hardware to enable */
#define hardware_disable(_slot_) /* No hardware to disable */
#endif /* CONFIG_RPXCLASSIC */
/* FADS Boards from Motorola */
#if defined(CONFIG_FADS)
#define PCMCIA_BOARD_MSG "FADS"
static int voltage_set(int slot, int vcc, int vpp)
{
u32 reg = 0;
switch(vcc) {
case 0:
break;
case 33:
reg |= BCSR1_PCCVCC0;
break;
case 50:
reg |= BCSR1_PCCVCC1;
break;
default:
return 1;
}
switch(vpp) {
case 0:
break;
case 33:
case 50:
if(vcc == vpp)
reg |= BCSR1_PCCVPP1;
else
return 1;
break;
case 120:
if ((vcc == 33) || (vcc == 50))
reg |= BCSR1_PCCVPP0;
else
return 1;
default:
return 1;
}
/* first, turn off all power */
out_be32((u32 *)BCSR1, in_be32((u32 *)BCSR1) & ~(BCSR1_PCCVCC_MASK | BCSR1_PCCVPP_MASK));
/* enable new powersettings */
out_be32((u32 *)BCSR1, in_be32((u32 *)BCSR1) | reg);
return 0;
}
#define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
static void hardware_enable(int slot)
{
out_be32((u32 *)BCSR1, in_be32((u32 *)BCSR1) & ~BCSR1_PCCEN);
}
static void hardware_disable(int slot)
{
out_be32((u32 *)BCSR1, in_be32((u32 *)BCSR1) | BCSR1_PCCEN);
}
#endif
/* MPC885ADS Boards */
#if defined(CONFIG_MPC885ADS)
#define PCMCIA_BOARD_MSG "MPC885ADS"
static int voltage_set(int slot, int vcc, int vpp)
{
u32 reg = 0;
unsigned *bcsr_io;
bcsr_io = ioremap(BCSR1, sizeof(unsigned long));
switch(vcc) {
case 0:
break;
case 33:
reg |= BCSR1_PCCVCC0;
break;
case 50:
reg |= BCSR1_PCCVCC1;
break;
default:
goto out_unmap;
}
switch(vpp) {
case 0:
break;
case 33:
case 50:
if(vcc == vpp)
reg |= BCSR1_PCCVPP1;
else
goto out_unmap;
break;
case 120:
if ((vcc == 33) || (vcc == 50))
reg |= BCSR1_PCCVPP0;
else
goto out_unmap;
default:
goto out_unmap;
}
/* first, turn off all power */
out_be32(bcsr_io, in_be32(bcsr_io) & ~(BCSR1_PCCVCC_MASK | BCSR1_PCCVPP_MASK));
/* enable new powersettings */
out_be32(bcsr_io, in_be32(bcsr_io) | reg);
iounmap(bcsr_io);
return 0;
out_unmap:
iounmap(bcsr_io);
return 1;
}
#define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
static void hardware_enable(int slot)
{
unsigned *bcsr_io;
bcsr_io = ioremap(BCSR1, sizeof(unsigned long));
out_be32(bcsr_io, in_be32(bcsr_io) & ~BCSR1_PCCEN);
iounmap(bcsr_io);
}
static void hardware_disable(int slot)
{
unsigned *bcsr_io;
bcsr_io = ioremap(BCSR1, sizeof(unsigned long));
out_be32(bcsr_io, in_be32(bcsr_io) | BCSR1_PCCEN);
iounmap(bcsr_io);
}
#endif
/* ------------------------------------------------------------------------- */
/* Motorola MBX860 */
#if defined(CONFIG_MBX)
#define PCMCIA_BOARD_MSG "MBX"
static int voltage_set(int slot, int vcc, int vpp)
{
u8 reg = 0;
switch(vcc) {
case 0:
break;
case 33:
reg |= CSR2_VCC_33;
break;
case 50:
reg |= CSR2_VCC_50;
break;
default:
return 1;
}
switch(vpp) {
case 0:
break;
case 33:
case 50:
if(vcc == vpp)
reg |= CSR2_VPP_VCC;
else
return 1;
break;
case 120:
if ((vcc == 33) || (vcc == 50))
reg |= CSR2_VPP_12;
else
return 1;
default:
return 1;
}
/* first, turn off all power */
out_8((u8 *)MBX_CSR2_ADDR, in_8((u8 *)MBX_CSR2_ADDR) & ~(CSR2_VCC_MASK | CSR2_VPP_MASK));
/* enable new powersettings */
out_8((u8 *)MBX_CSR2_ADDR, in_8((u8 *)MBX_CSR2_ADDR) | reg);
return 0;
}
#define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
#define hardware_enable(_slot_) /* No hardware to enable */
#define hardware_disable(_slot_) /* No hardware to disable */
#endif /* CONFIG_MBX */
#if defined(CONFIG_PRxK)
#include <asm/cpld.h>
extern volatile fpga_pc_regs *fpga_pc;
#define PCMCIA_BOARD_MSG "MPC855T"
static int voltage_set(int slot, int vcc, int vpp)
{
u8 reg = 0;
u8 regread;
cpld_regs *ccpld = get_cpld();
switch(vcc) {
case 0:
break;
case 33:
reg |= PCMCIA_VCC_33;
break;
case 50:
reg |= PCMCIA_VCC_50;
break;
default:
return 1;
}
switch(vpp) {
case 0:
break;
case 33:
case 50:
if(vcc == vpp)
reg |= PCMCIA_VPP_VCC;
else
return 1;
break;
case 120:
if ((vcc == 33) || (vcc == 50))
reg |= PCMCIA_VPP_12;
else
return 1;
default:
return 1;
}
reg = reg >> (slot << 2);
regread = in_8(&ccpld->fpga_pc_ctl);
if (reg != (regread & ((PCMCIA_VCC_MASK | PCMCIA_VPP_MASK) >> (slot << 2)))) {
/* enable new powersettings */
regread = regread & ~((PCMCIA_VCC_MASK | PCMCIA_VPP_MASK) >> (slot << 2));
out_8(&ccpld->fpga_pc_ctl, reg | regread);
msleep(100);
}
return 0;
}
#define socket_get(_slot_) PCMCIA_SOCKET_KEY_LV
#define hardware_enable(_slot_) /* No hardware to enable */
#define hardware_disable(_slot_) /* No hardware to disable */
#endif /* CONFIG_PRxK */
static void m8xx_shutdown(void)
{
u32 m, i;
struct pcmcia_win *w;
for(i = 0; i < PCMCIA_SOCKETS_NO; i++){
w = (void *) &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0;
out_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr, M8XX_PCMCIA_MASK(i));
out_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per, in_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per) & ~M8XX_PCMCIA_MASK(i));
/* turn off interrupt and disable CxOE */
out_be32(M8XX_PGCRX(i), M8XX_PGCRX_CXOE);
/* turn off memory windows */
for(m = 0; m < PCMCIA_MEM_WIN_NO; m++) {
out_be32(&w->or, 0); /* set to not valid */
w++;
}
/* turn off voltage */
voltage_set(i, 0, 0);
/* disable external hardware */
hardware_disable(i);
}
free_irq(pcmcia_schlvl, NULL);
}
static struct device_driver m8xx_driver = {
.name = "m8xx-pcmcia",
.bus = &platform_bus_type,
.suspend = pcmcia_socket_dev_suspend,
.resume = pcmcia_socket_dev_resume,
};
static struct platform_device m8xx_device = {
.name = "m8xx-pcmcia",
.id = 0,
};
static u32 pending_events[PCMCIA_SOCKETS_NO];
static DEFINE_SPINLOCK(pending_event_lock);
static irqreturn_t m8xx_interrupt(int irq, void *dev)
{
struct socket_info *s;
struct event_table *e;
unsigned int i, events, pscr, pipr, per;
dprintk("Interrupt!\n");
/* get interrupt sources */
pscr = in_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr);
pipr = in_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pipr);
per = in_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per);
for(i = 0; i < PCMCIA_SOCKETS_NO; i++) {
s = &socket[i];
e = &s->events[0];
events = 0;
while(e->regbit) {
if(pscr & e->regbit)
events |= e->eventbit;
e++;
}
/*
* report only if both card detect signals are the same
* not too nice done,
* we depend on that CD2 is the bit to the left of CD1...
*/
if(events & SS_DETECT)
if(((pipr & M8XX_PCMCIA_CD2(i)) >> 1) ^
(pipr & M8XX_PCMCIA_CD1(i)))
{
events &= ~SS_DETECT;
}
#ifdef PCMCIA_GLITCHY_CD
/*
* I've experienced CD problems with my ADS board.
* We make an extra check to see if there was a
* real change of Card detection.
*/
if((events & SS_DETECT) &&
((pipr &
(M8XX_PCMCIA_CD2(i) | M8XX_PCMCIA_CD1(i))) == 0) &&
(s->state.Vcc | s->state.Vpp)) {
events &= ~SS_DETECT;
/*printk( "CD glitch workaround - CD = 0x%08x!\n",
(pipr & (M8XX_PCMCIA_CD2(i)
| M8XX_PCMCIA_CD1(i))));*/
}
#endif
/* call the handler */
dprintk("slot %u: events = 0x%02x, pscr = 0x%08x, "
"pipr = 0x%08x\n",
i, events, pscr, pipr);
if(events) {
spin_lock(&pending_event_lock);
pending_events[i] |= events;
spin_unlock(&pending_event_lock);
/*
* Turn off RDY_L bits in the PER mask on
* CD interrupt receival.
*
* They can generate bad interrupts on the
* ACS4,8,16,32. - marcelo
*/
per &= ~M8XX_PCMCIA_RDY_L(0);
per &= ~M8XX_PCMCIA_RDY_L(1);
out_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per, per);
if (events)
pcmcia_parse_events(&socket[i].socket, events);
}
}
/* clear the interrupt sources */
out_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr, pscr);
dprintk("Interrupt done.\n");
return IRQ_HANDLED;
}
static u32 m8xx_get_graycode(u32 size)
{
u32 k;
for(k = 0; k < M8XX_SIZES_NO; k++)
if(m8xx_size_to_gray[k] == size)
break;
if((k == M8XX_SIZES_NO) || (m8xx_size_to_gray[k] == -1))
k = -1;
return k;
}
static u32 m8xx_get_speed(u32 ns, u32 is_io)
{
u32 reg, clocks, psst, psl, psht;
if(!ns) {
/*
* We get called with IO maps setup to 0ns
* if not specified by the user.
* They should be 255ns.
*/
if(is_io)
ns = 255;
else
ns = 100; /* fast memory if 0 */
}
/*
* In PSST, PSL, PSHT fields we tell the controller
* timing parameters in CLKOUT clock cycles.
* CLKOUT is the same as GCLK2_50.
*/
/* how we want to adjust the timing - in percent */
#define ADJ 180 /* 80 % longer accesstime - to be sure */
clocks = ((M8XX_BUSFREQ / 1000) * ns) / 1000;
clocks = (clocks * ADJ) / (100*1000);
if(clocks >= PCMCIA_BMT_LIMIT) {
printk( "Max access time limit reached\n");
clocks = PCMCIA_BMT_LIMIT-1;
}
psst = clocks / 7; /* setup time */
psht = clocks / 7; /* hold time */
psl = (clocks * 5) / 7; /* strobe length */
psst += clocks - (psst + psht + psl);
reg = psst << 12;
reg |= psl << 7;
reg |= psht << 16;
return reg;
}
static int m8xx_get_status(struct pcmcia_socket *sock, unsigned int *value)
{
int lsock = container_of(sock, struct socket_info, socket)->slot;
struct socket_info *s = &socket[lsock];
unsigned int pipr, reg;
pipr = in_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pipr);
*value = ((pipr & (M8XX_PCMCIA_CD1(lsock)
| M8XX_PCMCIA_CD2(lsock))) == 0) ? SS_DETECT : 0;
*value |= (pipr & M8XX_PCMCIA_WP(lsock)) ? SS_WRPROT : 0;
if (s->state.flags & SS_IOCARD)
*value |= (pipr & M8XX_PCMCIA_BVD1(lsock)) ? SS_STSCHG : 0;
else {
*value |= (pipr & M8XX_PCMCIA_RDY(lsock)) ? SS_READY : 0;
*value |= (pipr & M8XX_PCMCIA_BVD1(lsock)) ? SS_BATDEAD : 0;
*value |= (pipr & M8XX_PCMCIA_BVD2(lsock)) ? SS_BATWARN : 0;
}
if (s->state.Vcc | s->state.Vpp)
*value |= SS_POWERON;
/*
* Voltage detection:
* This driver only supports 16-Bit pc-cards.
* Cardbus is not handled here.
*
* To determine what voltage to use we must read the VS1 and VS2 pin.
* Depending on what socket type is present,
* different combinations mean different things.
*
* Card Key Socket Key VS1 VS2 Card Vcc for CIS parse
*
* 5V 5V, LV* NC NC 5V only 5V (if available)
*
* 5V 5V, LV* GND NC 5 or 3.3V as low as possible
*
* 5V 5V, LV* GND GND 5, 3.3, x.xV as low as possible
*
* LV* 5V - - shall not fit into socket
*
* LV* LV* GND NC 3.3V only 3.3V
*
* LV* LV* NC GND x.xV x.xV (if avail.)
*
* LV* LV* GND GND 3.3 or x.xV as low as possible
*
* *LV means Low Voltage
*
*
* That gives us the following table:
*
* Socket VS1 VS2 Voltage
*
* 5V NC NC 5V
* 5V NC GND none (should not be possible)
* 5V GND NC >= 3.3V
* 5V GND GND >= x.xV
*
* LV NC NC 5V (if available)
* LV NC GND x.xV (if available)
* LV GND NC 3.3V
* LV GND GND >= x.xV
*
* So, how do I determine if I have a 5V or a LV
* socket on my board? Look at the socket!
*
*
* Socket with 5V key:
* ++--------------------------------------------+
* || |
* || ||
* || ||
* | |
* +---------------------------------------------+
*
* Socket with LV key:
* ++--------------------------------------------+
* || |
* | ||
* | ||
* | |
* +---------------------------------------------+
*
*
* With other words - LV only cards does not fit
* into the 5V socket!
*/
/* read out VS1 and VS2 */
reg = (pipr & M8XX_PCMCIA_VS_MASK(lsock))
>> M8XX_PCMCIA_VS_SHIFT(lsock);
if(socket_get(lsock) == PCMCIA_SOCKET_KEY_LV) {
switch(reg) {
case 1:
*value |= SS_3VCARD;
break; /* GND, NC - 3.3V only */
case 2:
*value |= SS_XVCARD;
break; /* NC. GND - x.xV only */
};
}
dprintk("GetStatus(%d) = %#2.2x\n", lsock, *value);
return 0;
}
static int m8xx_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
{
int lsock = container_of(sock, struct socket_info, socket)->slot;
struct socket_info *s = &socket[lsock];
struct event_table *e;
unsigned int reg;
unsigned long flags;
dprintk( "SetSocket(%d, flags %#3.3x, Vcc %d, Vpp %d, "
"io_irq %d, csc_mask %#2.2x)\n", lsock, state->flags,
state->Vcc, state->Vpp, state->io_irq, state->csc_mask);
/* First, set voltage - bail out if invalid */
if(voltage_set(lsock, state->Vcc, state->Vpp))
return -EINVAL;
/* Take care of reset... */
if(state->flags & SS_RESET)
out_be32(M8XX_PGCRX(lsock), in_be32(M8XX_PGCRX(lsock)) | M8XX_PGCRX_CXRESET); /* active high */
else
out_be32(M8XX_PGCRX(lsock), in_be32(M8XX_PGCRX(lsock)) & ~M8XX_PGCRX_CXRESET);
/* ... and output enable. */
/* The CxOE signal is connected to a 74541 on the ADS.
I guess most other boards used the ADS as a reference.
I tried to control the CxOE signal with SS_OUTPUT_ENA,
but the reset signal seems connected via the 541.
If the CxOE is left high are some signals tristated and
no pullups are present -> the cards act wierd.
So right now the buffers are enabled if the power is on. */
if(state->Vcc || state->Vpp)
out_be32(M8XX_PGCRX(lsock), in_be32(M8XX_PGCRX(lsock)) & ~M8XX_PGCRX_CXOE); /* active low */
else
out_be32(M8XX_PGCRX(lsock), in_be32(M8XX_PGCRX(lsock)) | M8XX_PGCRX_CXOE);
/*
* We'd better turn off interrupts before
* we mess with the events-table..
*/
spin_lock_irqsave(&events_lock, flags);
/*
* Play around with the interrupt mask to be able to
* give the events the generic pcmcia driver wants us to.
*/
e = &s->events[0];
reg = 0;
if(state->csc_mask & SS_DETECT) {
e->eventbit = SS_DETECT;
reg |= e->regbit = (M8XX_PCMCIA_CD2(lsock)
| M8XX_PCMCIA_CD1(lsock));
e++;
}
if(state->flags & SS_IOCARD) {
/*
* I/O card
*/
if(state->csc_mask & SS_STSCHG) {
e->eventbit = SS_STSCHG;
reg |= e->regbit = M8XX_PCMCIA_BVD1(lsock);
e++;
}
/*
* If io_irq is non-zero we should enable irq.
*/
if(state->io_irq) {
out_be32(M8XX_PGCRX(lsock), in_be32(M8XX_PGCRX(lsock)) | mk_int_int_mask(state->io_irq) << 24);
/*
* Strange thing here:
* The manual does not tell us which interrupt
* the sources generate.
* Anyhow, I found out that RDY_L generates IREQLVL.
*
* We use level triggerd interrupts, and they don't
* have to be cleared in PSCR in the interrupt handler.
*/
reg |= M8XX_PCMCIA_RDY_L(lsock);
}
else
out_be32(M8XX_PGCRX(lsock), in_be32(M8XX_PGCRX(lsock)) & 0x00ffffff);
}
else {
/*
* Memory card
*/
if(state->csc_mask & SS_BATDEAD) {
e->eventbit = SS_BATDEAD;
reg |= e->regbit = M8XX_PCMCIA_BVD1(lsock);
e++;
}
if(state->csc_mask & SS_BATWARN) {
e->eventbit = SS_BATWARN;
reg |= e->regbit = M8XX_PCMCIA_BVD2(lsock);
e++;
}
/* What should I trigger on - low/high,raise,fall? */
if(state->csc_mask & SS_READY) {
e->eventbit = SS_READY;
reg |= e->regbit = 0; //??
e++;
}
}
e->regbit = 0; /* terminate list */
/*
* Clear the status changed .
* Port A and Port B share the same port.
* Writing ones will clear the bits.
*/
out_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr, reg);
/*
* Write the mask.
* Port A and Port B share the same port.
* Need for read-modify-write.
* Ones will enable the interrupt.
*/
/*
reg |= ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per
& M8XX_PCMCIA_MASK(lsock);
*/
reg |= in_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per) &
(M8XX_PCMCIA_MASK(0) | M8XX_PCMCIA_MASK(1));
out_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per, reg);
spin_unlock_irqrestore(&events_lock, flags);
/* copy the struct and modify the copy */
s->state = *state;
return 0;
}
static int m8xx_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *io)
{
int lsock = container_of(sock, struct socket_info, socket)->slot;
struct socket_info *s = &socket[lsock];
struct pcmcia_win *w;
unsigned int reg, winnr;
#define M8XX_SIZE (io->stop - io->start + 1)
#define M8XX_BASE (PCMCIA_IO_WIN_BASE + io->start)
dprintk( "SetIOMap(%d, %d, %#2.2x, %d ns, "
"%#4.4x-%#4.4x)\n", lsock, io->map, io->flags,
io->speed, io->start, io->stop);
if ((io->map >= PCMCIA_IO_WIN_NO) || (io->start > 0xffff)
|| (io->stop > 0xffff) || (io->stop < io->start))
return -EINVAL;
if((reg = m8xx_get_graycode(M8XX_SIZE)) == -1)
return -EINVAL;
if(io->flags & MAP_ACTIVE) {
dprintk( "io->flags & MAP_ACTIVE\n");
winnr = (PCMCIA_MEM_WIN_NO * PCMCIA_SOCKETS_NO)
+ (lsock * PCMCIA_IO_WIN_NO) + io->map;
/* setup registers */
w = (void *) &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0;
w += winnr;
out_be32(&w->or, 0); /* turn off window first */
out_be32(&w->br, M8XX_BASE);
reg <<= 27;
reg |= M8XX_PCMCIA_POR_IO |(lsock << 2);
reg |= m8xx_get_speed(io->speed, 1);
if(io->flags & MAP_WRPROT)
reg |= M8XX_PCMCIA_POR_WRPROT;
if(io->flags & (MAP_16BIT | MAP_AUTOSZ))
reg |= M8XX_PCMCIA_POR_16BIT;
if(io->flags & MAP_ACTIVE)
reg |= M8XX_PCMCIA_POR_VALID;
out_be32(&w->or, reg);
dprintk("Socket %u: Mapped io window %u at %#8.8x, "
"OR = %#8.8x.\n", lsock, io->map, w->br, w->or);
} else {
/* shutdown IO window */
winnr = (PCMCIA_MEM_WIN_NO * PCMCIA_SOCKETS_NO)
+ (lsock * PCMCIA_IO_WIN_NO) + io->map;
/* setup registers */
w = (void *) &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0;
w += winnr;
out_be32(&w->or, 0); /* turn off window */
out_be32(&w->br, 0); /* turn off base address */
dprintk("Socket %u: Unmapped io window %u at %#8.8x, "
"OR = %#8.8x.\n", lsock, io->map, w->br, w->or);
}
/* copy the struct and modify the copy */
s->io_win[io->map] = *io;
s->io_win[io->map].flags &= (MAP_WRPROT
| MAP_16BIT
| MAP_ACTIVE);
dprintk("SetIOMap exit\n");
return 0;
}
static int m8xx_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *mem)
{
int lsock = container_of(sock, struct socket_info, socket)->slot;
struct socket_info *s = &socket[lsock];
struct pcmcia_win *w;
struct pccard_mem_map *old;
unsigned int reg, winnr;
dprintk( "SetMemMap(%d, %d, %#2.2x, %d ns, "
"%#5.5lx, %#5.5x)\n", lsock, mem->map, mem->flags,
mem->speed, mem->static_start, mem->card_start);
if ((mem->map >= PCMCIA_MEM_WIN_NO)
// || ((mem->s) >= PCMCIA_MEM_WIN_SIZE)
|| (mem->card_start >= 0x04000000)
|| (mem->static_start & 0xfff) /* 4KByte resolution */
|| (mem->card_start & 0xfff))
return -EINVAL;
if((reg = m8xx_get_graycode(PCMCIA_MEM_WIN_SIZE)) == -1) {
printk( "Cannot set size to 0x%08x.\n", PCMCIA_MEM_WIN_SIZE);
return -EINVAL;
}
reg <<= 27;
winnr = (lsock * PCMCIA_MEM_WIN_NO) + mem->map;
/* Setup the window in the pcmcia controller */
w = (void *) &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0;
w += winnr;
reg |= lsock << 2;
reg |= m8xx_get_speed(mem->speed, 0);
if(mem->flags & MAP_ATTRIB)
reg |= M8XX_PCMCIA_POR_ATTRMEM;
if(mem->flags & MAP_WRPROT)
reg |= M8XX_PCMCIA_POR_WRPROT;
if(mem->flags & MAP_16BIT)
reg |= M8XX_PCMCIA_POR_16BIT;
if(mem->flags & MAP_ACTIVE)
reg |= M8XX_PCMCIA_POR_VALID;
out_be32(&w->or, reg);
dprintk("Socket %u: Mapped memory window %u at %#8.8x, "
"OR = %#8.8x.\n", lsock, mem->map, w->br, w->or);
if(mem->flags & MAP_ACTIVE) {
/* get the new base address */
mem->static_start = PCMCIA_MEM_WIN_BASE +
(PCMCIA_MEM_WIN_SIZE * winnr)
+ mem->card_start;
}
dprintk("SetMemMap(%d, %d, %#2.2x, %d ns, "
"%#5.5lx, %#5.5x)\n", lsock, mem->map, mem->flags,
mem->speed, mem->static_start, mem->card_start);
/* copy the struct and modify the copy */
old = &s->mem_win[mem->map];
*old = *mem;
old->flags &= (MAP_ATTRIB
| MAP_WRPROT
| MAP_16BIT
| MAP_ACTIVE);
return 0;
}
static int m8xx_sock_init(struct pcmcia_socket *sock)
{
int i;
pccard_io_map io = { 0, 0, 0, 0, 1 };
pccard_mem_map mem = { 0, 0, 0, 0, 0, 0 };
dprintk( "sock_init(%d)\n", s);
m8xx_set_socket(sock, &dead_socket);
for (i = 0; i < PCMCIA_IO_WIN_NO; i++) {
io.map = i;
m8xx_set_io_map(sock, &io);
}
for (i = 0; i < PCMCIA_MEM_WIN_NO; i++) {
mem.map = i;
m8xx_set_mem_map(sock, &mem);
}
return 0;
}
static int m8xx_suspend(struct pcmcia_socket *sock)
{
return m8xx_set_socket(sock, &dead_socket);
}
static struct pccard_operations m8xx_services = {
.init = m8xx_sock_init,
.suspend = m8xx_suspend,
.get_status = m8xx_get_status,
.set_socket = m8xx_set_socket,
.set_io_map = m8xx_set_io_map,
.set_mem_map = m8xx_set_mem_map,
};
static int __init m8xx_init(void)
{
struct pcmcia_win *w;
unsigned int i,m;
pcmcia_info("%s\n", version);
if (driver_register(&m8xx_driver))
return -1;
pcmcia_info(PCMCIA_BOARD_MSG " using " PCMCIA_SLOT_MSG
" with IRQ %u.\n", pcmcia_schlvl);
/* Configure Status change interrupt */
if(request_irq(pcmcia_schlvl, m8xx_interrupt, 0,
"m8xx_pcmcia", NULL)) {
pcmcia_error("Cannot allocate IRQ %u for SCHLVL!\n",
pcmcia_schlvl);
return -1;
}
w = (void *) &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0;
out_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr,
M8XX_PCMCIA_MASK(0)| M8XX_PCMCIA_MASK(1));
out_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per,
in_be32(&((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per) &
~(M8XX_PCMCIA_MASK(0)| M8XX_PCMCIA_MASK(1)));
/* connect interrupt and disable CxOE */
out_be32(M8XX_PGCRX(0), M8XX_PGCRX_CXOE | (mk_int_int_mask(pcmcia_schlvl) << 16));
out_be32(M8XX_PGCRX(1), M8XX_PGCRX_CXOE | (mk_int_int_mask(pcmcia_schlvl) << 16));
/* intialize the fixed memory windows */
for(i = 0; i < PCMCIA_SOCKETS_NO; i++){
for(m = 0; m < PCMCIA_MEM_WIN_NO; m++) {
out_be32(&w->br, PCMCIA_MEM_WIN_BASE +
(PCMCIA_MEM_WIN_SIZE
* (m + i * PCMCIA_MEM_WIN_NO)));
out_be32(&w->or, 0); /* set to not valid */
w++;
}
}
/* turn off voltage */
voltage_set(0, 0, 0);
voltage_set(1, 0, 0);
/* Enable external hardware */
hardware_enable(0);
hardware_enable(1);
platform_device_register(&m8xx_device);
for (i = 0 ; i < PCMCIA_SOCKETS_NO; i++) {
socket[i].slot = i;
socket[i].socket.owner = THIS_MODULE;
socket[i].socket.features = SS_CAP_PCCARD | SS_CAP_MEM_ALIGN | SS_CAP_STATIC_MAP;
socket[i].socket.irq_mask = 0x000;
socket[i].socket.map_size = 0x1000;
socket[i].socket.io_offset = 0;
socket[i].socket.pci_irq = i ? 7 : 9;
socket[i].socket.ops = &m8xx_services;
socket[i].socket.resource_ops = &pccard_iodyn_ops;
socket[i].socket.cb_dev = NULL;
socket[i].socket.dev.dev = &m8xx_device.dev;
}
for (i = 0; i < PCMCIA_SOCKETS_NO; i++)
pcmcia_register_socket(&socket[i].socket);
return 0;
}
static void __exit m8xx_exit(void)
{
int i;
for (i = 0; i < PCMCIA_SOCKETS_NO; i++)
pcmcia_unregister_socket(&socket[i].socket);
m8xx_shutdown();
platform_device_unregister(&m8xx_device);
driver_unregister(&m8xx_driver);
}
module_init(m8xx_init);
module_exit(m8xx_exit);
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