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kernel-aes67/drivers/pcmcia/m8xx_pcmcia.c
Julia Lawall 5a1c3e1aa9 drivers/pcmcia: Add missing iounmap 
of_iomap calls ioremap, and so should be matched with an iounmap.  At the
two error returns, the result of calling of_iomap is only stored in a local
variable, so these error paths need to call iounmap.  Furthermore, this
function ultimately stores the result of of_iomap in an array that is local
to the file.  These values should be iounmapped at some point.  I have
added a corresponding call to iounmap at the end of the function
m8xx_remove.

The problem was found using the following semantic match.
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
type T,T1,T2;
identifier E;
statement S;
expression x1,x2,x3;
int ret;
@@

  T E;
  ...
* E = of_iomap(...);
  if (E == NULL) S
  ... when != iounmap(...,(T1)E,...)
      when != if (E != NULL) { ... iounmap(...,(T1)E,...); ...}
      when != x1 = (T1)E
      when != E = x3;
      when any
  if (...) {
    ... when != iounmap(...,(T2)E,...)
        when != if (E != NULL) { ... iounmap(...,(T2)E,...); ...}
        when != x2 = (T2)E
(
*   return;
|
*   return ret;
)
  }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Vitaly Bordug <vitb@kernel.crashing.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Olof Johansson <olof@lixom.net>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05 09:44:09 -08:00

1343 lines
32 KiB
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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) 2005-2007 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 <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fsl_devices.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/time.h>
#include <asm/mpc8xx.h>
#include <asm/8xx_immap.h>
#include <asm/irq.h>
#include <asm/fs_pd.h>
#include <asm/of_device.h>
#include <asm/of_platform.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 */
/* ------------------------------------------------------------------------- */
static int 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];
/*
* 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;
};
static const char driver_name[] = "m8xx-pcmcia";
struct socket_info {
void (*handler) (void *info, u32 events);
void *info;
u32 slot;
pcmconf8xx_t *pcmcia;
u32 bus_freq;
int hwirq;
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"
#define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
static inline void hardware_enable(int slot)
{
m8xx_pcmcia_ops.hw_ctrl(slot, 1);
}
static inline void hardware_disable(int slot)
{
m8xx_pcmcia_ops.hw_ctrl(slot, 0);
}
static inline int voltage_set(int slot, int vcc, int vpp)
{
return m8xx_pcmcia_ops.voltage_set(slot, vcc, vpp);
}
#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 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;
pcmconf8xx_t *pcmcia = socket[0].pcmcia;
dprintk("Interrupt!\n");
/* get interrupt sources */
pscr = in_be32(&pcmcia->pcmc_pscr);
pipr = in_be32(&pcmcia->pcmc_pipr);
per = in_be32(&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(&pcmcia->pcmc_per, per);
if (events)
pcmcia_parse_events(&socket[i].socket, events);
}
}
/* clear the interrupt sources */
out_be32(&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 bus_freq)
{
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 = ((bus_freq / 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;
pcmconf8xx_t *pcmcia = s->pcmcia;
pipr = in_be32(&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;
pcmconf8xx_t *pcmcia = socket[0].pcmcia;
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 weird.
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(s->hwirq) << 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(&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 |=
in_be32(&pcmcia->
pcmc_per) & (M8XX_PCMCIA_MASK(0) | M8XX_PCMCIA_MASK(1));
out_be32(&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;
pcmconf8xx_t *pcmcia = s->pcmcia;
#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 *)&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, s->bus_freq);
if (io->flags & MAP_WRPROT)
reg |= M8XX_PCMCIA_POR_WRPROT;
/*if(io->flags & (MAP_16BIT | MAP_AUTOSZ)) */
if (io->flags & MAP_16BIT)
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 *)&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;
pcmconf8xx_t *pcmcia = s->pcmcia;
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 *)&pcmcia->pcmc_pbr0;
w += winnr;
reg |= lsock << 2;
reg |= m8xx_get_speed(mem->speed, 0, s->bus_freq);
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_sock_suspend(struct pcmcia_socket *sock)
{
return m8xx_set_socket(sock, &dead_socket);
}
static struct pccard_operations m8xx_services = {
.init = m8xx_sock_init,
.suspend = m8xx_sock_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_probe(struct of_device *ofdev,
const struct of_device_id *match)
{
struct pcmcia_win *w;
unsigned int i, m, hwirq;
pcmconf8xx_t *pcmcia;
int status;
struct device_node *np = ofdev->node;
pcmcia_info("%s\n", version);
pcmcia = of_iomap(np, 0);
if (pcmcia == NULL)
return -EINVAL;
pcmcia_schlvl = irq_of_parse_and_map(np, 0);
hwirq = irq_map[pcmcia_schlvl].hwirq;
if (pcmcia_schlvl < 0) {
iounmap(pcmcia);
return -EINVAL;
}
m8xx_pgcrx[0] = &pcmcia->pcmc_pgcra;
m8xx_pgcrx[1] = &pcmcia->pcmc_pgcrb;
pcmcia_info(PCMCIA_BOARD_MSG " using " PCMCIA_SLOT_MSG
" with IRQ %u (%d). \n", pcmcia_schlvl, hwirq);
/* Configure Status change interrupt */
if (request_irq(pcmcia_schlvl, m8xx_interrupt, IRQF_SHARED,
driver_name, socket)) {
pcmcia_error("Cannot allocate IRQ %u for SCHLVL!\n",
pcmcia_schlvl);
iounmap(pcmcia);
return -1;
}
w = (void *)&pcmcia->pcmc_pbr0;
out_be32(&pcmcia->pcmc_pscr, M8XX_PCMCIA_MASK(0) | M8XX_PCMCIA_MASK(1));
clrbits32(&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(hwirq) << 16));
out_be32(M8XX_PGCRX(1),
M8XX_PGCRX_CXOE | (mk_int_int_mask(hwirq) << 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);
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 = pcmcia_schlvl;
socket[i].socket.ops = &m8xx_services;
socket[i].socket.resource_ops = &pccard_nonstatic_ops;
socket[i].socket.cb_dev = NULL;
socket[i].socket.dev.parent = &ofdev->dev;
socket[i].pcmcia = pcmcia;
socket[i].bus_freq = ppc_proc_freq;
socket[i].hwirq = hwirq;
}
for (i = 0; i < PCMCIA_SOCKETS_NO; i++) {
status = pcmcia_register_socket(&socket[i].socket);
if (status < 0)
pcmcia_error("Socket register failed\n");
}
return 0;
}
static int m8xx_remove(struct of_device *ofdev)
{
u32 m, i;
struct pcmcia_win *w;
pcmconf8xx_t *pcmcia = socket[0].pcmcia;
for (i = 0; i < PCMCIA_SOCKETS_NO; i++) {
w = (void *)&pcmcia->pcmc_pbr0;
out_be32(&pcmcia->pcmc_pscr, M8XX_PCMCIA_MASK(i));
out_be32(&pcmcia->pcmc_per,
in_be32(&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);
}
for (i = 0; i < PCMCIA_SOCKETS_NO; i++)
pcmcia_unregister_socket(&socket[i].socket);
iounmap(pcmcia);
free_irq(pcmcia_schlvl, NULL);
return 0;
}
#ifdef CONFIG_PM
static int m8xx_suspend(struct platform_device *pdev, pm_message_t state)
{
return pcmcia_socket_dev_suspend(&pdev->dev, state);
}
static int m8xx_resume(struct platform_device *pdev)
{
return pcmcia_socket_dev_resume(&pdev->dev);
}
#else
#define m8xx_suspend NULL
#define m8xx_resume NULL
#endif
static struct of_device_id m8xx_pcmcia_match[] = {
{
.type = "pcmcia",
.compatible = "fsl,pq-pcmcia",
},
{},
};
MODULE_DEVICE_TABLE(of, m8xx_pcmcia_match);
static struct of_platform_driver m8xx_pcmcia_driver = {
.name = driver_name,
.match_table = m8xx_pcmcia_match,
.probe = m8xx_probe,
.remove = m8xx_remove,
.suspend = m8xx_suspend,
.resume = m8xx_resume,
};
static int __init m8xx_init(void)
{
return of_register_platform_driver(&m8xx_pcmcia_driver);
}
static void __exit m8xx_exit(void)
{
of_unregister_platform_driver(&m8xx_pcmcia_driver);
}
module_init(m8xx_init);
module_exit(m8xx_exit);
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