/*
* Turn power on or off to the SCC and associated stuff
* (port drivers, modem, IR port, etc.)
* Returns the number of milliseconds we should wait before
* trying to use the port.
*/
static int pmz_set_scc_power(struct uart_pmac_port *uap, int state)
{
int delay = 0;
int rc;
if (state) {
rc = pmac_call_feature(
PMAC_FTR_SCC_ENABLE, uap->node, uap->port_type, 1);
pmz_debug("port power on result: %d\n", rc);
if (ZS_IS_INTMODEM(uap)) {
rc = pmac_call_feature(
PMAC_FTR_MODEM_ENABLE, uap->node, 0, 1);
delay = 2500; /* wait for 2.5s before using */
pmz_debug("modem power result: %d\n", rc);
}
} else {
/* TODO: Make that depend on a timer, don't power down
* immediately
*/
if (ZS_IS_INTMODEM(uap)) {
rc = pmac_call_feature(
PMAC_FTR_MODEM_ENABLE, uap->node, 0, 0);
pmz_debug("port power off result: %d\n", rc);
}
pmac_call_feature(PMAC_FTR_SCC_ENABLE, uap->node, uap->port_type, 0);
}
return delay;
}
static const char *pmz_type(struct uart_port *port)
{
struct uart_pmac_port *uap = to_pmz(port);
if (ZS_IS_IRDA(uap))
return "Z85c30 ESCC - Infrared port";
else if (ZS_IS_INTMODEM(uap))
return "Z85c30 ESCC - Internal modem";
return "Z85c30 ESCC - Serial port";
}
/*
* Set Modem Control (RTS & DTR) bits
* The port lock is held and interrupts are disabled.
* Note: Shall we really filter out RTS on external ports or
* should that be dealt at higher level only ?
*/
static void pmz_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
struct uart_pmac_port *uap = to_pmz(port);
unsigned char set_bits, clear_bits;
/* Do nothing for irda for now... */
if (ZS_IS_IRDA(uap))
return;
/* We get called during boot with a port not up yet */
if (ZS_IS_ASLEEP(uap) ||
!(ZS_IS_OPEN(uap) || ZS_IS_CONS(uap)))
return;
set_bits = clear_bits = 0;
if (ZS_IS_INTMODEM(uap)) {
if (mctrl & TIOCM_RTS)
set_bits |= RTS;
else
clear_bits |= RTS;
}
if (mctrl & TIOCM_DTR)
set_bits |= DTR;
else
clear_bits |= DTR;
/* NOTE: Not subject to 'transmitter active' rule. */
uap->curregs[R5] |= set_bits;
uap->curregs[R5] &= ~clear_bits;
if (ZS_IS_ASLEEP(uap))
return;
write_zsreg(uap, R5, uap->curregs[R5]);
pmz_debug("pmz_set_mctrl: set bits: %x, clear bits: %x -> %x\n",
set_bits, clear_bits, uap->curregs[R5]);
zssync(uap);
}
/*
* Setup one port structure after probing, HW is down at this point,
* Unlike sunzilog, we don't need to pre-init the spinlock as we don't
* register our console before uart_add_one_port() is called
*/
static int __init pmz_init_port(struct uart_pmac_port *uap)
{
struct device_node *np = uap->node;
const char *conn;
const struct slot_names_prop {
int count;
char name[1];
} *slots;
int len;
struct resource r_ports, r_rxdma, r_txdma;
/*
* Request & map chip registers
*/
if (of_address_to_resource(np, 0, &r_ports))
return -ENODEV;
uap->port.mapbase = r_ports.start;
uap->port.membase = ioremap(uap->port.mapbase, 0x1000);
uap->control_reg = uap->port.membase;
uap->data_reg = uap->control_reg + 0x10;
/*
* Request & map DBDMA registers
*/
#ifdef HAS_DBDMA
if (of_address_to_resource(np, 1, &r_txdma) == 0 &&
of_address_to_resource(np, 2, &r_rxdma) == 0)
uap->flags |= PMACZILOG_FLAG_HAS_DMA;
#else
memset(&r_txdma, 0, sizeof(struct resource));
memset(&r_rxdma, 0, sizeof(struct resource));
#endif
if (ZS_HAS_DMA(uap)) {
uap->tx_dma_regs = ioremap(r_txdma.start, 0x100);
if (uap->tx_dma_regs == NULL) {
uap->flags &= ~PMACZILOG_FLAG_HAS_DMA;
goto no_dma;
}
uap->rx_dma_regs = ioremap(r_rxdma.start, 0x100);
if (uap->rx_dma_regs == NULL) {
iounmap(uap->tx_dma_regs);
uap->tx_dma_regs = NULL;
uap->flags &= ~PMACZILOG_FLAG_HAS_DMA;
goto no_dma;
}
uap->tx_dma_irq = irq_of_parse_and_map(np, 1);
uap->rx_dma_irq = irq_of_parse_and_map(np, 2);
}
no_dma:
/*
* Detect port type
*/
if (of_device_is_compatible(np, "cobalt"))
uap->flags |= PMACZILOG_FLAG_IS_INTMODEM;
conn = of_get_property(np, "AAPL,connector", &len);
if (conn && (strcmp(conn, "infrared") == 0))
uap->flags |= PMACZILOG_FLAG_IS_IRDA;
uap->port_type = PMAC_SCC_ASYNC;
/* 1999 Powerbook G3 has slot-names property instead */
slots = of_get_property(np, "slot-names", &len);
if (slots && slots->count > 0) {
if (strcmp(slots->name, "IrDA") == 0)
uap->flags |= PMACZILOG_FLAG_IS_IRDA;
else if (strcmp(slots->name, "Modem") == 0)
uap->flags |= PMACZILOG_FLAG_IS_INTMODEM;
}
if (ZS_IS_IRDA(uap))
uap->port_type = PMAC_SCC_IRDA;
if (ZS_IS_INTMODEM(uap)) {
struct device_node* i2c_modem =
of_find_node_by_name(NULL, "i2c-modem");
if (i2c_modem) {
const char* mid =
of_get_property(i2c_modem, "modem-id", NULL);
if (mid) switch(*mid) {
case 0x04 :
case 0x05 :
case 0x07 :
case 0x08 :
case 0x0b :
case 0x0c :
uap->port_type = PMAC_SCC_I2S1;
}
printk(KERN_INFO "pmac_zilog: i2c-modem detected, id: %d\n",
mid ? (*mid) : 0);
of_node_put(i2c_modem);
} else {
printk(KERN_INFO "pmac_zilog: serial modem detected\n");
}
}
/*
* Init remaining bits of "port" structure
*/
uap->port.iotype = UPIO_MEM;
uap->port.irq = irq_of_parse_and_map(np, 0);
uap->port.uartclk = ZS_CLOCK;
uap->port.fifosize = 1;
uap->port.ops = &pmz_pops;
uap->port.type = PORT_PMAC_ZILOG;
uap->port.flags = 0;
/* Setup some valid baud rate information in the register
* shadows so we don't write crap there before baud rate is
* first initialized.
*/
pmz_convert_to_zs(uap, CS8, 0, 9600);
return 0;
}
/*
* Setup one port structure after probing, HW is down at this point,
* Unlike sunzilog, we don't need to pre-init the spinlock as we don't
* register our console before uart_add_one_port() is called
*/
static int __init pmz_init_port(struct uart_pmac_port *uap)
{
struct device_node *np = uap->node;
char *conn;
struct slot_names_prop {
int count;
char name[1];
} *slots;
int len;
/*
* Request & map chip registers
*/
uap->port.mapbase = np->addrs[0].address;
uap->port.membase = ioremap(uap->port.mapbase, 0x1000);
uap->control_reg = (volatile u8 *)uap->port.membase;
uap->data_reg = uap->control_reg + 0x10;
/*
* Request & map DBDMA registers
*/
#ifdef HAS_DBDMA
if (np->n_addrs >= 3 && np->n_intrs >= 3)
uap->flags |= PMACZILOG_FLAG_HAS_DMA;
#endif
if (ZS_HAS_DMA(uap)) {
uap->tx_dma_regs = (volatile struct dbdma_regs *)
ioremap(np->addrs[np->n_addrs - 2].address, 0x1000);
if (uap->tx_dma_regs == NULL) {
uap->flags &= ~PMACZILOG_FLAG_HAS_DMA;
goto no_dma;
}
uap->rx_dma_regs = (volatile struct dbdma_regs *)
ioremap(np->addrs[np->n_addrs - 1].address, 0x1000);
if (uap->rx_dma_regs == NULL) {
iounmap((void *)uap->tx_dma_regs);
uap->tx_dma_regs = NULL;
uap->flags &= ~PMACZILOG_FLAG_HAS_DMA;
goto no_dma;
}
uap->tx_dma_irq = np->intrs[1].line;
uap->rx_dma_irq = np->intrs[2].line;
}
no_dma:
/*
* Detect port type
*/
if (device_is_compatible(np, "cobalt"))
uap->flags |= PMACZILOG_FLAG_IS_INTMODEM;
conn = get_property(np, "AAPL,connector", &len);
if (conn && (strcmp(conn, "infrared") == 0))
uap->flags |= PMACZILOG_FLAG_IS_IRDA;
uap->port_type = PMAC_SCC_ASYNC;
/* 1999 Powerbook G3 has slot-names property instead */
slots = (struct slot_names_prop *)get_property(np, "slot-names", &len);
if (slots && slots->count > 0) {
if (strcmp(slots->name, "IrDA") == 0)
uap->flags |= PMACZILOG_FLAG_IS_IRDA;
else if (strcmp(slots->name, "Modem") == 0)
uap->flags |= PMACZILOG_FLAG_IS_INTMODEM;
}
if (ZS_IS_IRDA(uap))
uap->port_type = PMAC_SCC_IRDA;
if (ZS_IS_INTMODEM(uap)) {
struct device_node* i2c_modem = find_devices("i2c-modem");
if (i2c_modem) {
char* mid = get_property(i2c_modem, "modem-id", NULL);
if (mid) switch(*mid) {
case 0x04 :
case 0x05 :
case 0x07 :
case 0x08 :
case 0x0b :
case 0x0c :
uap->port_type = PMAC_SCC_I2S1;
}
printk(KERN_INFO "pmac_zilog: i2c-modem detected, id: %d\n",
mid ? (*mid) : 0);
} else {
printk(KERN_INFO "pmac_zilog: serial modem detected\n");
}
}
/*
* Init remaining bits of "port" structure
*/
uap->port.iotype = SERIAL_IO_MEM;
uap->port.irq = np->intrs[0].line;
uap->port.uartclk = ZS_CLOCK;
uap->port.fifosize = 1;
uap->port.ops = &pmz_pops;
uap->port.type = PORT_PMAC_ZILOG;
uap->port.flags = 0;
/* Setup some valid baud rate information in the register
* shadows so we don't write crap there before baud rate is
* first initialized.
*/
pmz_convert_to_zs(uap, CS8, 0, 9600);
return 0;
}