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minix/drivers/ti1225/ti1225.c
Cristiano Giuffrida 48c6bb79f4 Driver refactory for live update and crash recovery. 
SYSLIB CHANGES:
- DS calls to publish / retrieve labels consider endpoints instead of u32_t.

VFS CHANGES:
- mapdriver() only adds an entry in the dmap table in VFS.
- dev_up() is only executed upon reception of a driver up event.

INET CHANGES:
- INET no longer searches for existing drivers instances at startup.
- A newtwork driver is (re)initialized upon reception of a driver up event.
- Networking startup is now race-free by design. No need to waste 5 seconds
at startup any more.

DRIVER CHANGES:
- Every driver publishes driver up events when starting for the first time or
in case of restart when recovery actions must be taken in the upper layers.
- Driver up events are published by drivers through DS. 
- For regular drivers, VFS is normally the only subscriber, but not necessarily.
For instance, when the filter driver is in use, it must subscribe to driver
up events to initiate recovery.
- For network drivers, inet is the only subscriber for now.
- Every VFS driver is statically linked with libdriver, every network driver
is statically linked with libnetdriver.

DRIVER LIBRARIES CHANGES:
- Libdriver is extended to provide generic receive() and ds_publish() interfaces
for VFS drivers.
- driver_receive() is a wrapper for sef_receive() also used in driver_task()
to discard spurious messages that were meant to be delivered to a previous
version of the driver.
- driver_receive_mq() is the same as driver_receive() but integrates support
for queued messages.
- driver_announce() publishes a driver up event for VFS drivers and marks
the driver as initialized and expecting a DEV_OPEN message.
- Libnetdriver is introduced to provide similar receive() and ds_publish()
interfaces for network drivers (netdriver_announce() and netdriver_receive()).
- Network drivers all support live update with no state transfer now.

KERNEL CHANGES:
- Added kernel call statectl for state management. Used by driver_announce() to
unblock eventual callers sendrecing to the driver.
2010-04-08 13:41:35 +00:00

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/*
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 "ti1225.h"
#include "i82365.h"
/* The use of interrupts is not yet ready for prime time */
#define USE_INTS 0
#define NR_PORTS 2
PRIVATE struct port
{
unsigned p_flags;
int p_devind;
u8_t p_cb_busnr;
u16_t p_exca_port;
#if USE_INTS
int p_irq;
int p_hook;
#endif
char *base_ptr;
volatile struct csr *csr_ptr;
char buffer[2*I386_PAGE_SIZE];
} ports[NR_PORTS];
#define PF_PRESENT 1
struct pcitab
{
u16_t vid;
u16_t did;
int checkclass;
};
PRIVATE struct pcitab pcitab_ti[]=
{
{ 0x104C, 0xAC1C, 0 }, /* TI PCI1225 */
{ 0x0000, 0x0000, 0 }
};
PRIVATE char *progname;
PRIVATE int debug;
FORWARD _PROTOTYPE( void hw_init, (struct port *pp) );
FORWARD _PROTOTYPE( void map_regs, (struct port *pp, u32_t base) );
FORWARD _PROTOTYPE( void do_int, (struct port *pp) );
FORWARD _PROTOTYPE( void do_outb, (port_t port, u8_t value) );
FORWARD _PROTOTYPE( u8_t do_inb, (port_t port) );
/* SEF functions and variables. */
FORWARD _PROTOTYPE( void sef_local_startup, (void) );
FORWARD _PROTOTYPE( int sef_cb_init_fresh, (int type, sef_init_info_t *info) );
EXTERN int env_argc;
EXTERN char **env_argv;
/*===========================================================================*
* 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 *
*===========================================================================*/
PRIVATE 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 *
*===========================================================================*/
PRIVATE int sef_cb_init_fresh(int type, sef_init_info_t *info)
{
/* Initialize the ti1225 driver. */
int c, i, r, first, devind, port;
u16_t vid, did;
(progname=strrchr(env_argv[0],'/')) ? progname++
: (progname=env_argv[0]);
if((r=tsc_calibrate()) != OK)
panic("tsc_calibrate failed: %d", r);
debug= 0;
while (c= getopt(env_argc, env_argv, "d?"), c != -1)
{
switch(c)
{
case '?': panic("Usage: ti1225 [-d]");
case 'd': debug++; break;
default: panic("getopt failed");
}
}
pci_init1(progname);
first= 1;
port= 0;
for (;;)
{
if (first)
{
first= 0;
r= pci_first_dev(&devind, &vid, &did);
}
else
r= pci_next_dev(&devind, &vid, &did);
if (r != 1)
break;
for (i= 0; pcitab_ti[i].vid != 0; i++)
{
if (pcitab_ti[i].vid != vid)
continue;
if (pcitab_ti[i].did != did)
continue;
if (pcitab_ti[i].checkclass) {
panic("fxp_probe: class check not implemented");
}
break;
}
if (pcitab_ti[i].vid == 0)
continue;
pci_reserve(devind);
if (debug)
printf("ti1225: found device %04x/%04x\n", vid, did);
ports[port].p_devind= devind;
ports[port].p_flags |= PF_PRESENT;
port++;
if (port >= NR_PORTS)
break;
}
for (i= 0; i<NR_PORTS; i++)
{
if (!(ports[i].p_flags & PF_PRESENT))
continue;
hw_init(&ports[i]);
}
/* Announce we are up! */
driver_announce();
return(OK);
}
PRIVATE void hw_init(pp)
struct port *pp;
{
int r, devind, irq;
u8_t v8;
u16_t v16;
u32_t v32;
devind= pp->p_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);
map_regs(pp, v32);
pp->csr_ptr= (struct csr *)pp->base_ptr;
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
}
PRIVATE void map_regs(struct port *pp, u32_t base)
{
int r;
vir_bytes buf_base;
buf_base= (vir_bytes)pp->buffer;
if (buf_base % I386_PAGE_SIZE)
buf_base += I386_PAGE_SIZE-(buf_base % I386_PAGE_SIZE);
pp->base_ptr= (char *)buf_base;
if (debug)
{
printf("ti1225: map_regs: using %p for %p\n",
pp->base_ptr, pp->buffer);
}
/* Clear low order bits in base */
base &= ~(u32_t)0xF;
#if 0
r= sys_vm_map(SELF, 1 /* map */, (vir_bytes)pp->base_ptr,
I386_PAGE_SIZE, (phys_bytes)base);
#else
r = ENOSYS;
#endif
if (r != OK)
panic("map_regs: sys_vm_map failed: %d", r);
}
PRIVATE void do_int(pp)
struct port *pp;
{
int r, devind, vcc_5v, vcc_3v, vcc_Xv, vcc_Yv,
socket_5v, socket_3v, socket_Xv, socket_Yv;
clock_t t0, t1;
u32_t csr_event, csr_present, csr_control;
u8_t v8;
u16_t v16;
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);
}
getuptime(&t0);
do {
csr_present= pp->csr_ptr->csr_present;
if (csr_present & CP_PWRCYCLE)
break;
} while (getuptime(&t1)==OK && (t1-t0) < micros_to_ticks(100000));
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
}
PRIVATE u8_t do_inb(port_t port)
{
int r;
u32_t value;
r= sys_inb(port, &value);
if (r != OK)
panic("sys_inb failed: %d", r);
return value;
}
PRIVATE void do_outb(port_t port, u8_t value)
{
int r;
r= sys_outb(port, value);
if (r != OK)
panic("sys_outb failed: %d", r);
}
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