OpenSDV
/
linux-stable-rt
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
linux-stable-rt/drivers/pcmcia/hd64465_ss.c

952 lines
25 KiB
C
Raw Blame History

/*
* $Id: hd64465_ss.c,v 1.7 2003/07/06 14:42:50 lethal Exp $
*
* Device driver for the PCMCIA controller module of the
* Hitachi HD64465 handheld companion chip.
*
* Note that the HD64465 provides a very thin PCMCIA host bridge
* layer, requiring a lot of the work of supporting cards to be
* performed by the processor. For example: mapping of card
* interrupts to processor IRQs is done by IRQ demuxing software;
* IO and memory mappings are fixed; setting voltages according
* to card Voltage Select pins etc is done in software.
*
* Note also that this driver uses only the simple, fixed,
* 16MB, 16-bit wide mappings to PCMCIA spaces defined by the
* HD64465. Larger mappings, smaller mappings, or mappings of
* different width to the same socket, are all possible only by
* involving the SH7750's MMU, which is considered unnecessary here.
* The downside is that it may be possible for some drivers to
* break because they need or expect 8-bit mappings.
*
* This driver currently supports only the following configuration:
* SH7750 CPU, HD64465, TPS2206 voltage control chip.
*
* by Greg Banks <gbanks@pocketpenguins.com>
* (c) 2000 PocketPenguins Inc
*/
#include <linux/types.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <asm/errno.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/hd64465/hd64465.h>
#include <asm/hd64465/io.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <pcmcia/ss.h>
#include <pcmcia/bulkmem.h>
#include "cs_internal.h"
#define MODNAME "hd64465_ss"
/* #define HD64465_DEBUG 1 */
#if HD64465_DEBUG
#define DPRINTK(args...) printk(MODNAME ": " args)
#else
#define DPRINTK(args...)
#endif
extern int hd64465_io_debug;
extern void * p3_ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags);
extern void p3_iounmap(void *addr);
/*============================================================*/
#define HS_IO_MAP_SIZE (64*1024)
typedef struct hs_socket_t
{
unsigned int number;
u_int irq;
u_long mem_base;
void *io_base;
u_long mem_length;
u_int ctrl_base;
socket_state_t state;
pccard_io_map io_maps[MAX_IO_WIN];
pccard_mem_map mem_maps[MAX_WIN];
struct pcmcia_socket socket;
} hs_socket_t;
#define HS_MAX_SOCKETS 2
static hs_socket_t hs_sockets[HS_MAX_SOCKETS];
#define hs_in(sp, r) inb((sp)->ctrl_base + (r))
#define hs_out(sp, v, r) outb(v, (sp)->ctrl_base + (r))
/* translate a boolean value to a bit in a register */
#define bool_to_regbit(sp, r, bi, bo) \
do { \
unsigned short v = hs_in(sp, r); \
if (bo) \
v |= (bi); \
else \
v &= ~(bi); \
hs_out(sp, v, r); \
} while(0)
/* register offsets from HD64465_REG_PCC[01]ISR */
#define ISR 0x0
#define GCR 0x2
#define CSCR 0x4
#define CSCIER 0x6
#define SCR 0x8
/* Mask and values for CSCIER register */
#define IER_MASK 0x80
#define IER_ON 0x3f /* interrupts on */
#define IER_OFF 0x00 /* interrupts off */
/*============================================================*/
#if HD64465_DEBUG > 10
static void cis_hex_dump(const unsigned char *x, int len)
{
int i;
for (i=0 ; i<len ; i++)
{
if (!(i & 0xf))
printk("\n%08x", (unsigned)(x + i));
printk(" %02x", *(volatile unsigned short*)x);
x += 2;
}
printk("\n");
}
#endif
/*============================================================*/
/*
* This code helps create the illusion that the IREQ line from
* the PC card is mapped to one of the CPU's IRQ lines by the
* host bridge hardware (which is how every host bridge *except*
* the HD64465 works). In particular, it supports enabling
* and disabling the IREQ line by code which knows nothing
* about the host bridge (e.g. device drivers, IDE code) using
* the request_irq(), free_irq(), probe_irq_on() and probe_irq_off()
* functions. Also, it supports sharing the mapped IRQ with
* real hardware IRQs from the -IRL0-3 lines.
*/
#define HS_NUM_MAPPED_IRQS 16 /* Limitation of the PCMCIA code */
static struct
{
/* index is mapped irq number */
hs_socket_t *sock;
hw_irq_controller *old_handler;
} hs_mapped_irq[HS_NUM_MAPPED_IRQS];
static void hs_socket_enable_ireq(hs_socket_t *sp)
{
unsigned short cscier;
DPRINTK("hs_socket_enable_ireq(sock=%d)\n", sp->number);
cscier = hs_in(sp, CSCIER);
cscier &= ~HD64465_PCCCSCIER_PIREQE_MASK;
cscier |= HD64465_PCCCSCIER_PIREQE_LEVEL;
hs_out(sp, cscier, CSCIER);
}
static void hs_socket_disable_ireq(hs_socket_t *sp)
{
unsigned short cscier;
DPRINTK("hs_socket_disable_ireq(sock=%d)\n", sp->number);
cscier = hs_in(sp, CSCIER);
cscier &= ~HD64465_PCCCSCIER_PIREQE_MASK;
hs_out(sp, cscier, CSCIER);
}
static unsigned int hs_startup_irq(unsigned int irq)
{
hs_socket_enable_ireq(hs_mapped_irq[irq].sock);
hs_mapped_irq[irq].old_handler->startup(irq);
return 0;
}
static void hs_shutdown_irq(unsigned int irq)
{
hs_socket_disable_ireq(hs_mapped_irq[irq].sock);
hs_mapped_irq[irq].old_handler->shutdown(irq);
}
static void hs_enable_irq(unsigned int irq)
{
hs_socket_enable_ireq(hs_mapped_irq[irq].sock);
hs_mapped_irq[irq].old_handler->enable(irq);
}
static void hs_disable_irq(unsigned int irq)
{
hs_socket_disable_ireq(hs_mapped_irq[irq].sock);
hs_mapped_irq[irq].old_handler->disable(irq);
}
extern struct hw_interrupt_type no_irq_type;
static void hs_mask_and_ack_irq(unsigned int irq)
{
hs_socket_disable_ireq(hs_mapped_irq[irq].sock);
/* ack_none() spuriously complains about an unexpected IRQ */
if (hs_mapped_irq[irq].old_handler != &no_irq_type)
hs_mapped_irq[irq].old_handler->ack(irq);
}
static void hs_end_irq(unsigned int irq)
{
hs_socket_enable_ireq(hs_mapped_irq[irq].sock);
hs_mapped_irq[irq].old_handler->end(irq);
}
static struct hw_interrupt_type hd64465_ss_irq_type = {
.typename = "PCMCIA-IRQ",
.startup = hs_startup_irq,
.shutdown = hs_shutdown_irq,
.enable = hs_enable_irq,
.disable = hs_disable_irq,
.ack = hs_mask_and_ack_irq,
.end = hs_end_irq
};
/*
* This function should only ever be called with interrupts disabled.
*/
static void hs_map_irq(hs_socket_t *sp, unsigned int irq)
{
DPRINTK("hs_map_irq(sock=%d irq=%d)\n", sp->number, irq);
if (irq >= HS_NUM_MAPPED_IRQS)
return;
hs_mapped_irq[irq].sock = sp;
/* insert ourselves as the irq controller */
hs_mapped_irq[irq].old_handler = irq_desc[irq].handler;
irq_desc[irq].handler = &hd64465_ss_irq_type;
}
/*
* This function should only ever be called with interrupts disabled.
*/
static void hs_unmap_irq(hs_socket_t *sp, unsigned int irq)
{
DPRINTK("hs_unmap_irq(sock=%d irq=%d)\n", sp->number, irq);
if (irq >= HS_NUM_MAPPED_IRQS)
return;
/* restore the original irq controller */
irq_desc[irq].handler = hs_mapped_irq[irq].old_handler;
}
/*============================================================*/
/*
* Set Vpp and Vcc (in tenths of a Volt). Does not
* support the hi-Z state.
*
* Note, this assumes the board uses a TPS2206 chip to control
* the Vcc and Vpp voltages to the hs_sockets. If your board
* uses the MIC2563 (also supported by the HD64465) then you
* will have to modify this function.
*/
/* 0V 3.3V 5.5V */
static const u_char hs_tps2206_avcc[3] = { 0x00, 0x04, 0x08 };
static const u_char hs_tps2206_bvcc[3] = { 0x00, 0x80, 0x40 };
static int hs_set_voltages(hs_socket_t *sp, int Vcc, int Vpp)
{
u_int psr;
u_int vcci = 0;
u_int sock = sp->number;
DPRINTK("hs_set_voltage(%d, %d, %d)\n", sock, Vcc, Vpp);
switch (Vcc)
{
case 0: vcci = 0; break;
case 33: vcci = 1; break;
case 50: vcci = 2; break;
default: return 0;
}
/* Note: Vpp = 120 not supported -- Greg Banks */
if (Vpp != 0 && Vpp != Vcc)
return 0;
/* The PSR register holds 8 of the 9 bits which control
* the TPS2206 via its serial interface.
*/
psr = inw(HD64465_REG_PCCPSR);
switch (sock)
{
case 0:
psr &= 0x0f;
psr |= hs_tps2206_avcc[vcci];
psr |= (Vpp == 0 ? 0x00 : 0x02);
break;
case 1:
psr &= 0xf0;
psr |= hs_tps2206_bvcc[vcci];
psr |= (Vpp == 0 ? 0x00 : 0x20);
break;
};
outw(psr, HD64465_REG_PCCPSR);
return 1;
}
/*============================================================*/
/*
* Drive the RESET line to the card.
*/
static void hs_reset_socket(hs_socket_t *sp, int on)
{
unsigned short v;
v = hs_in(sp, GCR);
if (on)
v |= HD64465_PCCGCR_PCCR;
else
v &= ~HD64465_PCCGCR_PCCR;
hs_out(sp, v, GCR);
}
/*============================================================*/
static int hs_init(struct pcmcia_socket *s)
{
hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
DPRINTK("hs_init(%d)\n", sp->number);
return 0;
}
/*============================================================*/
static int hs_get_status(struct pcmcia_socket *s, u_int *value)
{
hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
unsigned int isr;
u_int status = 0;
isr = hs_in(sp, ISR);
/* Card is seated and powered when *both* CD pins are low */
if ((isr & HD64465_PCCISR_PCD_MASK) == 0)
{
status |= SS_DETECT; /* card present */
switch (isr & HD64465_PCCISR_PBVD_MASK)
{
case HD64465_PCCISR_PBVD_BATGOOD:
break;
case HD64465_PCCISR_PBVD_BATWARN:
status |= SS_BATWARN;
break;
default:
status |= SS_BATDEAD;
break;
}
if (isr & HD64465_PCCISR_PREADY)
status |= SS_READY;
if (isr & HD64465_PCCISR_PMWP)
status |= SS_WRPROT;
/* Voltage Select pins interpreted as per Table 4-5 of the std.
* Assuming we have the TPS2206, the socket is a "Low Voltage
* key, 3.3V and 5V available, no X.XV available".
*/
switch (isr & (HD64465_PCCISR_PVS2|HD64465_PCCISR_PVS1))
{
case HD64465_PCCISR_PVS1:
printk(KERN_NOTICE MODNAME ": cannot handle X.XV card, ignored\n");
status = 0;
break;
case 0:
case HD64465_PCCISR_PVS2:
/* 3.3V */
status |= SS_3VCARD;
break;
case HD64465_PCCISR_PVS2|HD64465_PCCISR_PVS1:
/* 5V */
break;
}
/* TODO: SS_POWERON */
/* TODO: SS_STSCHG */
}
DPRINTK("hs_get_status(%d) = %x\n", sock, status);
*value = status;
return 0;
}
/*============================================================*/
static int hs_get_socket(struct pcmcia_socket *s, socket_state_t *state)
{
hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
DPRINTK("hs_get_socket(%d)\n", sock);
*state = sp->state;
return 0;
}
/*============================================================*/
static int hs_set_socket(struct pcmcia_socket *s, socket_state_t *state)
{
hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
u_long flags;
u_int changed;
unsigned short cscier;
DPRINTK("hs_set_socket(sock=%d, flags=%x, csc_mask=%x, Vcc=%d, Vpp=%d, io_irq=%d)\n",
sock, state->flags, state->csc_mask, state->Vcc, state->Vpp, state->io_irq);
local_irq_save(flags); /* Don't want interrupts happening here */
if (state->Vpp != sp->state.Vpp ||
state->Vcc != sp->state.Vcc) {
if (!hs_set_voltages(sp, state->Vcc, state->Vpp)) {
local_irq_restore(flags);
return -EINVAL;
}
}
/* hd64465_io_debug = 1; */
/*
* Handle changes in the Card Status Change mask,
* by propagating to the CSCR register
*/
changed = sp->state.csc_mask ^ state->csc_mask;
cscier = hs_in(sp, CSCIER);
if (changed & SS_DETECT) {
if (state->csc_mask & SS_DETECT)
cscier |= HD64465_PCCCSCIER_PCDE;
else
cscier &= ~HD64465_PCCCSCIER_PCDE;
}
if (changed & SS_READY) {
if (state->csc_mask & SS_READY)
cscier |= HD64465_PCCCSCIER_PRE;
else
cscier &= ~HD64465_PCCCSCIER_PRE;
}
if (changed & SS_BATDEAD) {
if (state->csc_mask & SS_BATDEAD)
cscier |= HD64465_PCCCSCIER_PBDE;
else
cscier &= ~HD64465_PCCCSCIER_PBDE;
}
if (changed & SS_BATWARN) {
if (state->csc_mask & SS_BATWARN)
cscier |= HD64465_PCCCSCIER_PBWE;
else
cscier &= ~HD64465_PCCCSCIER_PBWE;
}
if (changed & SS_STSCHG) {
if (state->csc_mask & SS_STSCHG)
cscier |= HD64465_PCCCSCIER_PSCE;
else
cscier &= ~HD64465_PCCCSCIER_PSCE;
}
hs_out(sp, cscier, CSCIER);
if (sp->state.io_irq && !state->io_irq)
hs_unmap_irq(sp, sp->state.io_irq);
else if (!sp->state.io_irq && state->io_irq)
hs_map_irq(sp, state->io_irq);
/*
* Handle changes in the flags field,
* by propagating to config registers.
*/
changed = sp->state.flags ^ state->flags;
if (changed & SS_IOCARD) {
DPRINTK("card type: %s\n",
(state->flags & SS_IOCARD ? "i/o" : "memory" ));
bool_to_regbit(sp, GCR, HD64465_PCCGCR_PCCT,
state->flags & SS_IOCARD);
}
if (changed & SS_RESET) {
DPRINTK("%s reset card\n",
(state->flags & SS_RESET ? "start" : "stop"));
bool_to_regbit(sp, GCR, HD64465_PCCGCR_PCCR,
state->flags & SS_RESET);
}
if (changed & SS_OUTPUT_ENA) {
DPRINTK("%sabling card output\n",
(state->flags & SS_OUTPUT_ENA ? "en" : "dis"));
bool_to_regbit(sp, GCR, HD64465_PCCGCR_PDRV,
state->flags & SS_OUTPUT_ENA);
}
/* TODO: SS_SPKR_ENA */
/* hd64465_io_debug = 0; */
sp->state = *state;
local_irq_restore(flags);
#if HD64465_DEBUG > 10
if (state->flags & SS_OUTPUT_ENA)
cis_hex_dump((const unsigned char*)sp->mem_base, 0x100);
#endif
return 0;
}
/*============================================================*/
static int hs_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
{
hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
int map = io->map;
int sock = sp->number;
struct pccard_io_map *sio;
pgprot_t prot;
DPRINTK("hs_set_io_map(sock=%d, map=%d, flags=0x%x, speed=%dns, start=%#lx, stop=%#lx)\n",
sock, map, io->flags, io->speed, io->start, io->stop);
if (map >= MAX_IO_WIN)
return -EINVAL;
sio = &sp->io_maps[map];
/* check for null changes */
if (io->flags == sio->flags &&
io->start == sio->start &&
io->stop == sio->stop)
return 0;
if (io->flags & MAP_AUTOSZ)
prot = PAGE_KERNEL_PCC(sock, _PAGE_PCC_IODYN);
else if (io->flags & MAP_16BIT)
prot = PAGE_KERNEL_PCC(sock, _PAGE_PCC_IO16);
else
prot = PAGE_KERNEL_PCC(sock, _PAGE_PCC_IO8);
/* TODO: handle MAP_USE_WAIT */
if (io->flags & MAP_USE_WAIT)
printk(KERN_INFO MODNAME ": MAP_USE_WAIT unimplemented\n");
/* TODO: handle MAP_PREFETCH */
if (io->flags & MAP_PREFETCH)
printk(KERN_INFO MODNAME ": MAP_PREFETCH unimplemented\n");
/* TODO: handle MAP_WRPROT */
if (io->flags & MAP_WRPROT)
printk(KERN_INFO MODNAME ": MAP_WRPROT unimplemented\n");
/* TODO: handle MAP_0WS */
if (io->flags & MAP_0WS)
printk(KERN_INFO MODNAME ": MAP_0WS unimplemented\n");
if (io->flags & MAP_ACTIVE) {
unsigned long pstart, psize, paddrbase;
paddrbase = virt_to_phys((void*)(sp->mem_base + 2 * HD64465_PCC_WINDOW));
pstart = io->start & PAGE_MASK;
psize = ((io->stop + PAGE_SIZE) & PAGE_MASK) - pstart;
/*
* Change PTEs in only that portion of the mapping requested
* by the caller. This means that most of the time, most of
* the PTEs in the io_vma will be unmapped and only the bottom
* page will be mapped. But the code allows for weird cards
* that might want IO ports > 4K.
*/
sp->io_base = p3_ioremap(paddrbase + pstart, psize, pgprot_val(prot));
/*
* Change the mapping used by inb() outb() etc
*/
hd64465_port_map(io->start,
io->stop - io->start + 1,
(unsigned long)sp->io_base + io->start, 0);
} else {
hd64465_port_unmap(sio->start, sio->stop - sio->start + 1);
p3_iounmap(sp->io_base);
}
*sio = *io;
return 0;
}
/*============================================================*/
static int hs_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *mem)
{
hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
struct pccard_mem_map *smem;
int map = mem->map;
unsigned long paddr;
#if 0
DPRINTK("hs_set_mem_map(sock=%d, map=%d, flags=0x%x, card_start=0x%08x)\n",
sock, map, mem->flags, mem->card_start);
#endif
if (map >= MAX_WIN)
return -EINVAL;
smem = &sp->mem_maps[map];
paddr = sp->mem_base; /* base of Attribute mapping */
if (!(mem->flags & MAP_ATTRIB))
paddr += HD64465_PCC_WINDOW; /* base of Common mapping */
paddr += mem->card_start;
/* Because we specified SS_CAP_STATIC_MAP, we are obliged
* at this time to report the system address corresponding
* to the card address requested. This is how Socket Services
* queries our fixed mapping. I wish this fact had been
* documented - Greg Banks.
*/
mem->static_start = paddr;
*smem = *mem;
return 0;
}
/* TODO: do we need to use the MMU to access Common memory ??? */
/*============================================================*/
/*
* This function is registered with the HD64465 glue code to do a
* secondary demux step on the PCMCIA interrupts. It handles
* mapping the IREQ request from the card to a standard Linux
* IRQ, as requested by SocketServices.
*/
static int hs_irq_demux(int irq, void *dev)
{
hs_socket_t *sp = (hs_socket_t *)dev;
u_int cscr;
DPRINTK("hs_irq_demux(irq=%d)\n", irq);
if (sp->state.io_irq &&
(cscr = hs_in(sp, CSCR)) & HD64465_PCCCSCR_PIREQ) {
cscr &= ~HD64465_PCCCSCR_PIREQ;
hs_out(sp, cscr, CSCR);
return sp->state.io_irq;
}
return irq;
}
/*============================================================*/
/*
* Interrupt handling routine.
*/
static irqreturn_t hs_interrupt(int irq, void *dev, struct pt_regs *regs)
{
hs_socket_t *sp = (hs_socket_t *)dev;
u_int events = 0;
u_int cscr;
cscr = hs_in(sp, CSCR);
DPRINTK("hs_interrupt, cscr=%04x\n", cscr);
/* check for bus-related changes to be reported to Socket Services */
if (cscr & HD64465_PCCCSCR_PCDC) {
/* double-check for a 16-bit card, as we don't support CardBus */
if ((hs_in(sp, ISR) & HD64465_PCCISR_PCD_MASK) != 0) {
printk(KERN_NOTICE MODNAME
": socket %d, card not a supported card type or not inserted correctly\n",
sp->number);
/* Don't do the rest unless a card is present */
cscr &= ~(HD64465_PCCCSCR_PCDC|
HD64465_PCCCSCR_PRC|
HD64465_PCCCSCR_PBW|
HD64465_PCCCSCR_PBD|
HD64465_PCCCSCR_PSC);
} else {
cscr &= ~HD64465_PCCCSCR_PCDC;
events |= SS_DETECT; /* card insertion or removal */
}
}
if (cscr & HD64465_PCCCSCR_PRC) {
cscr &= ~HD64465_PCCCSCR_PRC;
events |= SS_READY; /* ready signal changed */
}
if (cscr & HD64465_PCCCSCR_PBW) {
cscr &= ~HD64465_PCCCSCR_PSC;
events |= SS_BATWARN; /* battery warning */
}
if (cscr & HD64465_PCCCSCR_PBD) {
cscr &= ~HD64465_PCCCSCR_PSC;
events |= SS_BATDEAD; /* battery dead */
}
if (cscr & HD64465_PCCCSCR_PSC) {
cscr &= ~HD64465_PCCCSCR_PSC;
events |= SS_STSCHG; /* STSCHG (status changed) signal */
}
if (cscr & HD64465_PCCCSCR_PIREQ) {
cscr &= ~HD64465_PCCCSCR_PIREQ;
/* This should have been dealt with during irq demux */
printk(KERN_NOTICE MODNAME ": unexpected IREQ from card\n");
}
hs_out(sp, cscr, CSCR);
if (events)
pcmcia_parse_events(&sp->socket, events);
return IRQ_HANDLED;
}
/*============================================================*/
static struct pccard_operations hs_operations = {
.init = hs_init,
.get_status = hs_get_status,
.get_socket = hs_get_socket,
.set_socket = hs_set_socket,
.set_io_map = hs_set_io_map,
.set_mem_map = hs_set_mem_map,
};
static int hs_init_socket(hs_socket_t *sp, int irq, unsigned long mem_base,
unsigned int ctrl_base)
{
unsigned short v;
int i, err;
memset(sp, 0, sizeof(*sp));
sp->irq = irq;
sp->mem_base = mem_base;
sp->mem_length = 4*HD64465_PCC_WINDOW; /* 16MB */
sp->ctrl_base = ctrl_base;
for (i=0 ; i<MAX_IO_WIN ; i++)
sp->io_maps[i].map = i;
for (i=0 ; i<MAX_WIN ; i++)
sp->mem_maps[i].map = i;
hd64465_register_irq_demux(sp->irq, hs_irq_demux, sp);
if ((err = request_irq(sp->irq, hs_interrupt, SA_INTERRUPT, MODNAME, sp)) < 0)
return err;
if (request_mem_region(sp->mem_base, sp->mem_length, MODNAME) == 0) {
sp->mem_base = 0;
return -ENOMEM;
}
/* According to section 3.2 of the PCMCIA standard, low-voltage
* capable cards must implement cold insertion, i.e. Vpp and
* Vcc set to 0 before card is inserted.
*/
/*hs_set_voltages(sp, 0, 0);*/
/* hi-Z the outputs to the card and set 16MB map mode */
v = hs_in(sp, GCR);
v &= ~HD64465_PCCGCR_PCCT; /* memory-only card */
hs_out(sp, v, GCR);
v = hs_in(sp, GCR);
v |= HD64465_PCCGCR_PDRV; /* enable outputs to card */
hs_out(sp, v, GCR);
v = hs_in(sp, GCR);
v |= HD64465_PCCGCR_PMMOD; /* 16MB mapping mode */
hs_out(sp, v, GCR);
v = hs_in(sp, GCR);
/* lowest 16MB of Common */
v &= ~(HD64465_PCCGCR_PPA25|HD64465_PCCGCR_PPA24);
hs_out(sp, v, GCR);
hs_reset_socket(sp, 1);
printk(KERN_INFO "HD64465 PCMCIA bridge socket %d at 0x%08lx irq %d\n",
i, sp->mem_base, sp->irq);
return 0;
}
static void hs_exit_socket(hs_socket_t *sp)
{
unsigned short cscier, gcr;
unsigned long flags;
local_irq_save(flags);
/* turn off interrupts in hardware */
cscier = hs_in(sp, CSCIER);
cscier = (cscier & IER_MASK) | IER_OFF;
hs_out(sp, cscier, CSCIER);
/* hi-Z the outputs to the card */
gcr = hs_in(sp, GCR);
gcr &= HD64465_PCCGCR_PDRV;
hs_out(sp, gcr, GCR);
/* power the card down */
hs_set_voltages(sp, 0, 0);
if (sp->mem_base != 0)
release_mem_region(sp->mem_base, sp->mem_length);
if (sp->irq != 0) {
free_irq(sp->irq, hs_interrupt);
hd64465_unregister_irq_demux(sp->irq);
}
local_irq_restore(flags);
}
static struct device_driver hd64465_driver = {
.name = "hd64465-pcmcia",
.bus = &platform_bus_type,
.suspend = pcmcia_socket_dev_suspend,
.resume = pcmcia_socket_dev_resume,
};
static struct platform_device hd64465_device = {
.name = "hd64465-pcmcia",
.id = 0,
};
static int __init init_hs(void)
{
int i;
unsigned short v;
/* hd64465_io_debug = 1; */
if (driver_register(&hd64465_driver))
return -EINVAL;
/* Wake both sockets out of STANDBY mode */
/* TODO: wait 15ms */
v = inw(HD64465_REG_SMSCR);
v &= ~(HD64465_SMSCR_PC0ST|HD64465_SMSCR_PC1ST);
outw(v, HD64465_REG_SMSCR);
/* keep power controller out of shutdown mode */
v = inb(HD64465_REG_PCC0SCR);
v |= HD64465_PCCSCR_SHDN;
outb(v, HD64465_REG_PCC0SCR);
/* use serial (TPS2206) power controller */
v = inb(HD64465_REG_PCC0CSCR);
v |= HD64465_PCCCSCR_PSWSEL;
outb(v, HD64465_REG_PCC0CSCR);
/*
* Setup hs_sockets[] structures and request system resources.
* TODO: on memory allocation failure, power down the socket
* before quitting.
*/
for (i=0; i<HS_MAX_SOCKETS; i++) {
hs_set_voltages(&hs_sockets[i], 0, 0);
hs_sockets[i].socket.features |= SS_CAP_PCCARD | SS_CAP_STATIC_MAP; /* mappings are fixed in host memory */
hs_sockets[i].socket.resource_ops = &pccard_static_ops;
hs_sockets[i].socket.irq_mask = 0xffde;/*0xffff*/ /* IRQs mapped in s/w so can do any, really */
hs_sockets[i].socket.map_size = HD64465_PCC_WINDOW; /* 16MB fixed window size */
hs_sockets[i].socket.owner = THIS_MODULE;
hs_sockets[i].socket.ss_entry = &hs_operations;
}
i = hs_init_socket(&hs_sockets[0],
HD64465_IRQ_PCMCIA0,
HD64465_PCC0_BASE,
HD64465_REG_PCC0ISR);
if (i < 0) {
unregister_driver(&hd64465_driver);
return i;
}
i = hs_init_socket(&hs_sockets[1],
HD64465_IRQ_PCMCIA1,
HD64465_PCC1_BASE,
HD64465_REG_PCC1ISR);
if (i < 0) {
unregister_driver(&hd64465_driver);
return i;
}
/* hd64465_io_debug = 0; */
platform_device_register(&hd64465_device);
for (i=0; i<HS_MAX_SOCKETS; i++) {
unsigned int ret;
hs_sockets[i].socket.dev.dev = &hd64465_device.dev;
hs_sockets[i].number = i;
ret = pcmcia_register_socket(&hs_sockets[i].socket);
if (ret && i)
pcmcia_unregister_socket(&hs_sockets[0].socket);
}
return 0;
}
static void __exit exit_hs(void)
{
int i;
for (i=0 ; i<HS_MAX_SOCKETS ; i++) {
pcmcia_unregister_socket(&hs_sockets[i].socket);
hs_exit_socket(&hs_sockets[i]);
}
platform_device_unregister(&hd64465_device);
unregister_driver(&hd64465_driver);
}
module_init(init_hs);
module_exit(exit_hs);
/*============================================================*/
/*END*/
Reference in New Issue View Git Blame Copy Permalink