minix3/drivers/bus/ti1225/ti1225.c

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2020-02-21 00:59:27 +05:30
/*
ti1225.c
Created: Dec 2005 by Philip Homburg
*/
#include <minix/drivers.h>
#include <minix/driver.h>
#include <machine/pci.h>
#include <machine/vm.h>
#include <machine/vmparam.h>
#include <sys/mman.h>
#include "ti1225.h"
#include "i82365.h"
/* The use of interrupts is not yet ready for prime time */
#define USE_INTS 0
static struct port
{
int p_devind;
u8_t p_cb_busnr;
u16_t p_exca_port;
#if USE_INTS
int p_irq;
int p_hook;
#endif
volatile struct csr *csr_ptr;
} port;
static int instance;
static int debug;
static int hw_probe(int skip);
static void hw_init(struct port *pp, int devind);
static void do_int(struct port *pp);
/* SEF functions and variables. */
static void sef_local_startup(void);
static int sef_cb_init_fresh(int type, sef_init_info_t *info);
/*===========================================================================*
* main *
*===========================================================================*/
int main(int argc, char *argv[])
{
int r;
message m;
int ipc_status;
/* SEF local startup. */
env_setargs(argc, argv);
sef_local_startup();
for (;;)
{
r= driver_receive(ANY, &m, &ipc_status);
if (r != OK)
panic("driver_receive failed: %d", r);
printf("ti1225: got message %u from %d\n",
m.m_type, m.m_source);
}
return 0;
}
/*===========================================================================*
* sef_local_startup *
*===========================================================================*/
static void sef_local_startup()
{
/* Register init callbacks. */
sef_setcb_init_fresh(sef_cb_init_fresh);
sef_setcb_init_lu(sef_cb_init_fresh);
sef_setcb_init_restart(sef_cb_init_fresh);
/* Register live update callbacks. */
sef_setcb_lu_prepare(sef_cb_lu_prepare_always_ready);
sef_setcb_lu_state_isvalid(sef_cb_lu_state_isvalid_standard);
/* Let SEF perform startup. */
sef_startup();
}
/*===========================================================================*
* sef_cb_init_fresh *
*===========================================================================*/
static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
{
/* Initialize the ti1225 driver. */
int r, devind;
long v;
if((r=tsc_calibrate()) != OK)
panic("tsc_calibrate failed: %d", r);
v = 0;
(void) env_parse("instance", "d", 0, &v, 0, 255);
instance = (int) v;
v = 0;
(void) env_parse("debug", "d", 0, &v, 0, 1);
debug = (int) v;
devind = hw_probe(instance);
if (devind < 0)
return(ENODEV);
hw_init(&port, devind);
return(OK);
}
/*===========================================================================*
* hw_probe *
*===========================================================================*/
static int hw_probe(int skip)
{
u16_t vid, did;
int devind;
pci_init();
if (pci_first_dev(&devind, &vid, &did) != 1)
return(-1);
while (skip--)
if (pci_next_dev(&devind, &vid, &did) != 1)
return(-1);
pci_reserve(devind);
if (debug)
printf("ti1225: found device %04x/%04x\n", vid, did);
return(devind);
}
/*===========================================================================*
* hw_init *
*===========================================================================*/
static void hw_init(struct port *pp, int devind)
{
u8_t v8;
u16_t v16;
u32_t v32;
#if USE_INTS
int r, irq;
#endif
pp->p_devind= devind;
if (debug)
printf("hw_init: devind = %d\n", devind);
if (debug)
{
v16= pci_attr_r16(devind, PCI_CR);
printf("ti1225: command register 0x%x\n", v16);
}
v32= pci_attr_r32(devind, TI_CB_BASEADDR);
if (debug)
printf("ti1225: Cardbus/ExCA base address 0x%x\n", v32);
v32 &= PCI_BAR_MEM_MASK; /* Clear low order bits in base */
pp->csr_ptr=
(struct csr *) vm_map_phys(SELF, (void *) v32, PAGE_SIZE);
if (pp->csr_ptr == MAP_FAILED)
panic("hw_init: vm_map_phys failed");
if (debug)
{
v8= pci_attr_r8(devind, TI_PCI_BUS_NR);
printf("ti1225: PCI bus number %d\n", v8);
}
v8= pci_attr_r8(devind, TI_CB_BUS_NR);
pp->p_cb_busnr= v8;
if (debug)
{
printf("ti1225: CardBus bus number %d\n", v8);
v8= pci_attr_r8(devind, TI_SO_BUS_NR);
printf("ti1225: Subordinate bus number %d\n", v8);
}
#if USE_INTS
irq= pci_attr_r8(devind, PCI_ILR);
pp->p_irq= irq;
printf("ti1225 using IRQ %d\n", irq);
#endif
v32= pci_attr_r32(devind, TI_LEGACY_BA);
v32 &= ~1;
if (debug)
{
printf("ti1225: PC Card 16-bit legacy-mode base address 0x%x\n",
v32);
}
if (v32 == 0)
panic("bad legacy-mode base address: %d", v32);
pp->p_exca_port= v32;
if (debug)
{
v32= pci_attr_r32(devind, TI_MF_ROUTE);
printf("ti1225: Multifunction routing 0x%08x\n", v32);
}
#if USE_INTS
pp->p_hook = pp->p_irq;
r= sys_irqsetpolicy(pp->p_irq, 0, &pp->p_hook);
if (r != OK)
panic("sys_irqsetpolicy failed: %d", r);
#endif
/* Clear CBB_BC_INTEXCA */
v16= pci_attr_r16(devind, CBB_BRIDGECTRL);
if (debug)
printf("ti1225: Bridge control 0x%04x\n", v16);
v16 &= ~CBB_BC_INTEXCA;
pci_attr_w16(devind, CBB_BRIDGECTRL, v16);
if (debug)
{
v32= pci_attr_r32(devind, TI_SYSCTRL);
printf("ti1225: System Control Register 0x%08x\n", v32);
v8= pci_attr_r8(devind, TI_CARD_CTRL);
printf("ti1225: Card Control 0x%02x\n", v8);
v8= pci_attr_r8(devind, TI_DEV_CTRL);
printf("ti1225: Device Control 0x%02x\n", v8);
}
/* Enable socket interrupts */
pp->csr_ptr->csr_mask |= CM_PWRMASK | CM_CDMASK | CM_CSTSMASK;
do_int(pp);
#if USE_INTS
r= sys_irqenable(&pp->p_hook);
if (r != OK)
panic("unable enable interrupts: %d", r);
#endif
}
/*===========================================================================*
* do_int *
*===========================================================================*/
static void do_int(struct port *pp)
{
int devind, vcc_5v, vcc_3v, vcc_Xv, vcc_Yv,
socket_5v, socket_3v, socket_Xv, socket_Yv;
spin_t spin;
u32_t csr_event, csr_present, csr_control;
u8_t v8;
u16_t v16;
#if USE_INTS
int r;
#endif
devind= pp->p_devind;
v8= pci_attr_r8(devind, TI_CARD_CTRL);
if (v8 & TI_CCR_IFG)
{
printf("ti1225: got functional interrupt\n");
pci_attr_w8(devind, TI_CARD_CTRL, v8);
}
if (debug)
{
printf("Socket event: 0x%x\n", pp->csr_ptr->csr_event);
printf("Socket mask: 0x%x\n", pp->csr_ptr->csr_mask);
}
csr_present= pp->csr_ptr->csr_present;
csr_control= pp->csr_ptr->csr_control;
if ((csr_present & (CP_CDETECT1|CP_CDETECT2)) != 0)
{
if (debug)
printf("do_int: no card present\n");
return;
}
if (csr_present & CP_BADVCCREQ)
{
printf("do_int: Bad Vcc request\n");
/* return; */
}
if (csr_present & CP_DATALOST)
{
/* Do we care? */
if (debug)
printf("do_int: Data lost\n");
/* return; */
}
if (csr_present & CP_NOTACARD)
{
printf("do_int: Not a card\n");
return;
}
if (debug)
{
if (csr_present & CP_CBCARD)
printf("do_int: Cardbus card detected\n");
if (csr_present & CP_16BITCARD)
printf("do_int: 16-bit card detected\n");
}
if (csr_present & CP_PWRCYCLE)
{
if (debug)
printf("do_int: powered up\n");
return;
}
vcc_5v= !!(csr_present & CP_5VCARD);
vcc_3v= !!(csr_present & CP_3VCARD);
vcc_Xv= !!(csr_present & CP_XVCARD);
vcc_Yv= !!(csr_present & CP_YVCARD);
if (debug)
{
printf("do_int: card supports:%s%s%s%s\n",
vcc_5v ? " 5V" : "", vcc_3v ? " 3V" : "",
vcc_Xv ? " X.X V" : "", vcc_Yv ? " Y.Y V" : "");
}
socket_5v= !!(csr_present & CP_5VSOCKET);
socket_3v= !!(csr_present & CP_3VSOCKET);
socket_Xv= !!(csr_present & CP_XVSOCKET);
socket_Yv= !!(csr_present & CP_YVSOCKET);
if (debug)
{
printf("do_int: socket supports:%s%s%s%s\n",
socket_5v ? " 5V" : "", socket_3v ? " 3V" : "",
socket_Xv ? " X.X V" : "", socket_Yv ? " Y.Y V" : "");
}
if (vcc_5v && socket_5v)
{
csr_control= (csr_control & ~CC_VCCCTRL) | CC_VCC_5V;
pp->csr_ptr->csr_control= csr_control;
if (debug)
printf("do_int: applying 5V\n");
}
else if (vcc_3v && socket_3v)
{
csr_control= (csr_control & ~CC_VCCCTRL) | CC_VCC_3V;
pp->csr_ptr->csr_control= csr_control;
if (debug)
printf("do_int: applying 3V\n");
}
else if (vcc_Xv && socket_Xv)
{
csr_control= (csr_control & ~CC_VCCCTRL) | CC_VCC_XV;
pp->csr_ptr->csr_control= csr_control;
printf("do_int: applying X.X V\n");
}
else if (vcc_Yv && socket_Yv)
{
csr_control= (csr_control & ~CC_VCCCTRL) | CC_VCC_YV;
pp->csr_ptr->csr_control= csr_control;
printf("do_int: applying Y.Y V\n");
}
else
{
printf("do_int: socket and card are not compatible\n");
return;
}
csr_event= pp->csr_ptr->csr_event;
if (csr_event)
{
if (debug)
printf("clearing socket event\n");
pp->csr_ptr->csr_event= csr_event;
if (debug)
{
printf("Socket event (cleared): 0x%x\n",
pp->csr_ptr->csr_event);
}
}
devind= pp->p_devind;
v8= pci_attr_r8(devind, TI_CARD_CTRL);
if (v8 & TI_CCR_IFG)
{
printf("ti1225: got functional interrupt\n");
pci_attr_w8(devind, TI_CARD_CTRL, v8);
}
if (debug)
{
v8= pci_attr_r8(devind, TI_CARD_CTRL);
printf("TI_CARD_CTRL: 0x%02x\n", v8);
}
spin_init(&spin, 100000);
do {
csr_present= pp->csr_ptr->csr_present;
if (csr_present & CP_PWRCYCLE)
break;
} while (spin_check(&spin));
if (!(csr_present & CP_PWRCYCLE))
{
printf("do_int: not powered up?\n");
return;
}
/* Reset device */
v16= pci_attr_r16(devind, CBB_BRIDGECTRL);
v16 |= CBB_BC_CRST;
pci_attr_w16(devind, CBB_BRIDGECTRL, v16);
/* Wait one microsecond. Is this correct? What are the specs? */
micro_delay(1);
/* Clear CBB_BC_CRST */
v16= pci_attr_r16(devind, CBB_BRIDGECTRL);
v16 &= ~CBB_BC_CRST;
pci_attr_w16(devind, CBB_BRIDGECTRL, v16);
/* Wait one microsecond after clearing the reset line. Is this
* correct? What are the specs?
*/
micro_delay(1);
pci_rescan_bus(pp->p_cb_busnr);
#if USE_INTS
r= sys_irqenable(&pp->p_hook);
if (r != OK)
panic("unable enable interrupts: %d", r);
#endif
}