diff options
Diffstat (limited to 'drivers/pcmcia/hd64465_ss.c')
| -rw-r--r-- | drivers/pcmcia/hd64465_ss.c | 968 |
1 files changed, 968 insertions, 0 deletions
diff --git a/drivers/pcmcia/hd64465_ss.c b/drivers/pcmcia/hd64465_ss.c new file mode 100644 index 0000000..5e6c4ba --- /dev/null +++ b/drivers/pcmcia/hd64465_ss.c @@ -0,0 +1,968 @@ +/* + * $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/device.h> + +#include <asm/io.h> +#include <asm/hd64465/hd64465.h> +#include <asm/hd64465/io.h> + +#include <pcmcia/version.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 int hd64465_suspend(struct device *dev, u32 state, u32 level) +{ + int ret = 0; + if (level == SUSPEND_SAVE_STATE) + ret = pcmcia_socket_dev_suspend(dev, state); + return ret; +} + +static int hd64465_resume(struct device *dev, u32 level) +{ + int ret = 0; + if (level == RESUME_RESTORE_STATE) + ret = pcmcia_socket_dev_resume(dev); + return ret; +} + +static struct device_driver hd64465_driver = { + .name = "hd64465-pcmcia", + .bus = &platform_bus_type, + .suspend = hd64465_suspend, + .resume = hd64465_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*/ |
