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authorNiels de Vos <niels.devos@wincor-nixdorf.com>2007-08-22 17:01:14 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-22 22:52:44 -0400
commit84f8c6fc0e3b6e48fd22c28fc3bb666a130b3994 (patch)
tree84fe673ef04b8262456103619d6dc75c1f133ff7
parent20620d688ac6ff8ea01a873e46febf5a6a7909f1 (diff)
serial: add support for ITE 887x chips
Add support for the it887x-chips (PCI) manufactured by ITE. Signed-off-by: Niels de Vos <niels.devos@wincor-nixdorf.com> Cc: Russell King <rmk@arm.linux.org.uk> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/serial/8250_pci.c159
1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c
index 5e485876f54c..fd76542c5977 100644
--- a/drivers/serial/8250_pci.c
+++ b/drivers/serial/8250_pci.c
@@ -580,6 +580,138 @@ static int pci_netmos_init(struct pci_dev *dev)
580 return num_serial; 580 return num_serial;
581} 581}
582 582
583/*
584 * ITE support by Niels de Vos <niels.devos@wincor-nixdorf.com>
585 *
586 * These chips are available with optionally one parallel port and up to
587 * two serial ports. Unfortunately they all have the same product id.
588 *
589 * Basic configuration is done over a region of 32 I/O ports. The base
590 * ioport is called INTA or INTC, depending on docs/other drivers.
591 *
592 * The region of the 32 I/O ports is configured in POSIO0R...
593 */
594
595/* registers */
596#define ITE_887x_MISCR 0x9c
597#define ITE_887x_INTCBAR 0x78
598#define ITE_887x_UARTBAR 0x7c
599#define ITE_887x_PS0BAR 0x10
600#define ITE_887x_POSIO0 0x60
601
602/* I/O space size */
603#define ITE_887x_IOSIZE 32
604/* I/O space size (bits 26-24; 8 bytes = 011b) */
605#define ITE_887x_POSIO_IOSIZE_8 (3 << 24)
606/* I/O space size (bits 26-24; 32 bytes = 101b) */
607#define ITE_887x_POSIO_IOSIZE_32 (5 << 24)
608/* Decoding speed (1 = slow, 2 = medium, 3 = fast) */
609#define ITE_887x_POSIO_SPEED (3 << 29)
610/* enable IO_Space bit */
611#define ITE_887x_POSIO_ENABLE (1 << 31)
612
613static int __devinit pci_ite887x_init(struct pci_dev *dev)
614{
615 /* inta_addr are the configuration addresses of the ITE */
616 static const short inta_addr[] = { 0x2a0, 0x2c0, 0x220, 0x240, 0x1e0,
617 0x200, 0x280, 0 };
618 int ret, i, type;
619 struct resource *iobase = NULL;
620 u32 miscr, uartbar, ioport;
621
622 /* search for the base-ioport */
623 i = 0;
624 while (inta_addr[i] && iobase == NULL) {
625 iobase = request_region(inta_addr[i], ITE_887x_IOSIZE,
626 "ite887x");
627 if (iobase != NULL) {
628 /* write POSIO0R - speed | size | ioport */
629 pci_write_config_dword(dev, ITE_887x_POSIO0,
630 ITE_887x_POSIO_ENABLE | ITE_887x_POSIO_SPEED |
631 ITE_887x_POSIO_IOSIZE_32 | inta_addr[i]);
632 /* write INTCBAR - ioport */
633 pci_write_config_dword(dev, ITE_887x_INTCBAR, inta_addr[i]);
634 ret = inb(inta_addr[i]);
635 if (ret != 0xff) {
636 /* ioport connected */
637 break;
638 }
639 release_region(iobase->start, ITE_887x_IOSIZE);
640 iobase = NULL;
641 }
642 i++;
643 }
644
645 if (!inta_addr[i]) {
646 printk(KERN_ERR "ite887x: could not find iobase\n");
647 return -ENODEV;
648 }
649
650 /* start of undocumented type checking (see parport_pc.c) */
651 type = inb(iobase->start + 0x18) & 0x0f;
652
653 switch (type) {
654 case 0x2: /* ITE8871 (1P) */
655 case 0xa: /* ITE8875 (1P) */
656 ret = 0;
657 break;
658 case 0xe: /* ITE8872 (2S1P) */
659 ret = 2;
660 break;
661 case 0x6: /* ITE8873 (1S) */
662 ret = 1;
663 break;
664 case 0x8: /* ITE8874 (2S) */
665 ret = 2;
666 break;
667 default:
668 moan_device("Unknown ITE887x", dev);
669 ret = -ENODEV;
670 }
671
672 /* configure all serial ports */
673 for (i = 0; i < ret; i++) {
674 /* read the I/O port from the device */
675 pci_read_config_dword(dev, ITE_887x_PS0BAR + (0x4 * (i + 1)),
676 &ioport);
677 ioport &= 0x0000FF00; /* the actual base address */
678 pci_write_config_dword(dev, ITE_887x_POSIO0 + (0x4 * (i + 1)),
679 ITE_887x_POSIO_ENABLE | ITE_887x_POSIO_SPEED |
680 ITE_887x_POSIO_IOSIZE_8 | ioport);
681
682 /* write the ioport to the UARTBAR */
683 pci_read_config_dword(dev, ITE_887x_UARTBAR, &uartbar);
684 uartbar &= ~(0xffff << (16 * i)); /* clear half the reg */
685 uartbar |= (ioport << (16 * i)); /* set the ioport */
686 pci_write_config_dword(dev, ITE_887x_UARTBAR, uartbar);
687
688 /* get current config */
689 pci_read_config_dword(dev, ITE_887x_MISCR, &miscr);
690 /* disable interrupts (UARTx_Routing[3:0]) */
691 miscr &= ~(0xf << (12 - 4 * i));
692 /* activate the UART (UARTx_En) */
693 miscr |= 1 << (23 - i);
694 /* write new config with activated UART */
695 pci_write_config_dword(dev, ITE_887x_MISCR, miscr);
696 }
697
698 if (ret <= 0) {
699 /* the device has no UARTs if we get here */
700 release_region(iobase->start, ITE_887x_IOSIZE);
701 }
702
703 return ret;
704}
705
706static void __devexit pci_ite887x_exit(struct pci_dev *dev)
707{
708 u32 ioport;
709 /* the ioport is bit 0-15 in POSIO0R */
710 pci_read_config_dword(dev, ITE_887x_POSIO0, &ioport);
711 ioport &= 0xffff;
712 release_region(ioport, ITE_887x_IOSIZE);
713}
714
583static int 715static int
584pci_default_setup(struct serial_private *priv, struct pciserial_board *board, 716pci_default_setup(struct serial_private *priv, struct pciserial_board *board,
585 struct uart_port *port, int idx) 717 struct uart_port *port, int idx)
@@ -653,6 +785,18 @@ static struct pci_serial_quirk pci_serial_quirks[] = {
653 .setup = pci_default_setup, 785 .setup = pci_default_setup,
654 }, 786 },
655 /* 787 /*
788 * ITE
789 */
790 {
791 .vendor = PCI_VENDOR_ID_ITE,
792 .device = PCI_DEVICE_ID_ITE_8872,
793 .subvendor = PCI_ANY_ID,
794 .subdevice = PCI_ANY_ID,
795 .init = pci_ite887x_init,
796 .setup = pci_default_setup,
797 .exit = __devexit_p(pci_ite887x_exit),
798 },
799 /*
656 * Panacom 800 * Panacom
657 */ 801 */
658 { 802 {
@@ -933,6 +1077,7 @@ enum pci_board_num_t {
933 1077
934 pbn_b1_2_1250000, 1078 pbn_b1_2_1250000,
935 1079
1080 pbn_b1_bt_1_115200,
936 pbn_b1_bt_2_921600, 1081 pbn_b1_bt_2_921600,
937 1082
938 pbn_b1_1_1382400, 1083 pbn_b1_1_1382400,
@@ -1211,6 +1356,13 @@ static struct pciserial_board pci_boards[] __devinitdata = {
1211 .uart_offset = 8, 1356 .uart_offset = 8,
1212 }, 1357 },
1213 1358
1359 [pbn_b1_bt_1_115200] = {
1360 .flags = FL_BASE1|FL_BASE_BARS,
1361 .num_ports = 1,
1362 .base_baud = 115200,
1363 .uart_offset = 8,
1364 },
1365
1214 [pbn_b1_bt_2_921600] = { 1366 [pbn_b1_bt_2_921600] = {
1215 .flags = FL_BASE1|FL_BASE_BARS, 1367 .flags = FL_BASE1|FL_BASE_BARS,
1216 .num_ports = 2, 1368 .num_ports = 2,
@@ -2364,6 +2516,13 @@ static struct pci_device_id serial_pci_tbl[] = {
2364 { PCI_VENDOR_ID_TOPIC, PCI_DEVICE_ID_TOPIC_TP560, 2516 { PCI_VENDOR_ID_TOPIC, PCI_DEVICE_ID_TOPIC_TP560,
2365 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2517 PCI_ANY_ID, PCI_ANY_ID, 0, 0,
2366 pbn_b0_1_115200 }, 2518 pbn_b0_1_115200 },
2519 /*
2520 * ITE
2521 */
2522 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2523 PCI_ANY_ID, PCI_ANY_ID,
2524 0, 0,
2525 pbn_b1_bt_1_115200 },
2367 2526
2368 /* 2527 /*
2369 * IntaShield IS-200 2528 * IntaShield IS-200