/*
ti1225.c

Created:	Dec 2005 by Philip Homburg
*/

#include "../drivers.h"
#include <ibm/pci.h>
#include <sys/vm.h>

#include "ti1225.h"
#include "i82365.h"

/* The use of interrupts is not yet ready for prime time */
#define USE_INTS	0

#define MICROS_TO_TICKS(m)  (((m)*HZ/1000000)+1)

#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*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 init, (void)					);
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( u8_t read_exca, (struct port *pp, int socket, int reg) );
FORWARD _PROTOTYPE( void do_outb, (port_t port, u8_t value)		);
FORWARD _PROTOTYPE( u8_t do_inb, (port_t port)				);
FORWARD _PROTOTYPE( void micro_delay, (unsigned long usecs)		);

int main(int argc, char *argv[])
{
	int c, r;
	message m;

	(progname=strrchr(argv[0],'/')) ? progname++ : (progname=argv[0]);

	debug= 0;
	while (c= getopt(argc, argv, "d?"), c != -1)
	{
		switch(c)
		{
		case '?': panic("ti1225", "Usage: ti1225 [-d]", NO_NUM);
		case 'd': debug++; break;
		default: panic("ti1225", "getopt failed", NO_NUM);
		}
	}

	init();

	for (;;)
	{
		r= receive(ANY, &m);
		if (r != OK)
			panic("ti1225", "receive failed", r);
		printf("ti1225: got message %u from %d\n",
			m.m_type, m.m_source);
	}
	return 0;
}

PRIVATE void init()
{
	int i, r, first, devind, port;
	u16_t vid, did;

	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("ti1225",
				"fxp_probe: class check not implemented",
					NO_NUM);
			}
			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]);
	}
}

PRIVATE void hw_init(pp)
struct port *pp;
{
	int i, r, devind, irq, socket;
	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("ti1225", "bad lagacy-mode base address 0x%x\n", 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("ti1225","sys_irqsetpolicy failed", 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("ti1225","unable enable interrupts", r);
#endif
}

PRIVATE void map_regs(pp, base)
struct port *pp;
u32_t base;
{
	int r;
	vir_bytes buf_base;

	buf_base= (vir_bytes)pp->buffer;
	if (buf_base % PAGE_SIZE)
		buf_base += PAGE_SIZE-(buf_base % 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;

	r= sys_vm_map(SELF, 1 /* map */, (vir_bytes)pp->base_ptr,
		PAGE_SIZE, (phys_bytes)base);
	if (r != OK)
		panic("ti1225", "map_regs: sys_vm_map failed", r);
}

PRIVATE void do_int(pp)
struct port *pp;
{
	int i, 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", v8);
		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", v8);
		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("ti1225","unable enable interrupts", r);
#endif

}

PRIVATE u8_t read_exca(pp, socket, reg)
struct port *pp;
int socket;
int reg;
{
	u16_t port;

	port= pp->p_exca_port;
	if (port == 0)
		panic("ti1225", "read_exca: bad port", NO_NUM);
	do_outb(port, socket * 0x40 + reg);
	return do_inb(port+1);
}

PRIVATE u8_t do_inb(port_t port)
{
	int r;
	u32_t value;

	r= sys_inb(port, &value);
	if (r != OK)
		panic("ti1225","sys_inb failed", r);
	return value;
}

PRIVATE void do_outb(port_t port, u8_t value)
{
	int r;

	r= sys_outb(port, value);
	if (r != OK)
		panic("ti1225","sys_outb failed", r);
}

PRIVATE void micro_delay(unsigned long usecs)
{
	tickdelay(MICROS_TO_TICKS(usecs));
}