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Date: Mon, 26 Mar 2007 16:17:02 +0200
From: Niels de Vos <niels.devos@...cor-nixdorf.com>
To: rmk+serial@....linux.org.uk, linux-serial@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] Add support for ITE887x serial chipsets
Hi,
the Super I/O 887x-chipsets of ITE, are currently not completely
supported. Only parport_pc has the ability to activate the (optional)
parallel port. This patch adds support for the serial ports.
Signed-off-by: Niels de Vos <niels.devos@...cor-nixdorf.com>
--- linux-2.6.20.3/drivers/serial/8250_pci.c.orig 2007-03-13 19:27:08.000000000 +0100
+++ linux-2.6.20.3/drivers/serial/8250_pci.c 2007-03-26 15:42:17.000000000 +0200
@@ -581,6 +581,174 @@ static int pci_netmos_init(struct pci_de
return num_serial;
}
+/*
+ * ITE support by Niels de Vos <niels.devos@...cor-nixdorf.com>
+ */
+
+static int __devinit pci_ite887x_init(struct pci_dev *dev)
+{
+ /* inta_addr are the configuration addresses of the ITE */
+ short inta_addr[] = { 0x2a0, 0x2c0, 0x220, 0x240, 0x1E0, 0x200,
+ 0x280, 0 };
+ int ret, i, type;
+ struct resource *iobase;
+
+ /* search for the base-ioport */
+ i = 0;
+ while (inta_addr[i] && dev->dev.driver_data != NULL) {
+ dev->dev.driver_data = request_region(inta_addr[i], 32,
+ "ite887x");
+ if (dev->dev.driver_data != NULL) {
+ /* write POSIO0R - speed | size | ioport */
+ pci_write_config_dword(dev, 0x60,
+ 0xe5000000 | inta_addr[i]);
+ /* write INTCBAR - ioport */
+ pci_write_config_dword(dev, 0x78, inta_addr[i]);
+ ret = inb(inta_addr[i]);
+ if (ret != 0xff) {
+ /* ioport connected */
+ break;
+ }
+ release_resource(dev->dev.driver_data);
+ dev->dev.driver_data = NULL;
+ }
+ i++;
+ }
+
+ if (! inta_addr[i]) {
+ printk(KERN_ERR "ite887x: could not find iobase\n");
+ return -ENODEV;
+ }
+
+ iobase = dev->dev.driver_data;
+
+ /* start of undocumented type checking (see parport_pc.c) */
+ type = inb(iobase->start + 0x18);
+ type &= 0x0f;
+
+ switch (type) {
+ case 0x2:
+ printk(KERN_DEBUG "8250_pci: ITE8871 found (1P)\n");
+ break;
+ case 0xa:
+ printk(KERN_DEBUG "8250_pci: ITE8875 found (1P)\n");
+ break;
+ case 0xe:
+ printk(KERN_INFO "8250_pci: ITE8872 found (2S1P)\n");
+ return 2;
+ case 0x6:
+ printk(KERN_INFO "8250_pci: ITE8873 found (1S)\n");
+ return 1;
+ case 0x8:
+ printk(KERN_INFO "8250_pci: ITE8874 found (2S)\n");
+ return 2;
+ default:
+ moan_device("unknown ITE887x", dev);
+ }
+
+ /* the device has no UARTs if we get here */
+ release_resource(iobase);
+ dev->dev.driver_data = NULL;
+ return -ENODEV;
+}
+
+/*
+ * activate the UART in the MISCR
+ */
+static int
+pci_ite887x_setup(struct serial_private *priv, struct pciserial_board *board,
+ struct uart_port *port, int idx)
+{
+ int ret;
+ struct pci_dev *dev = priv->dev;
+ u32 miscr, uartbar, ioport;
+ /* iobase is the private driver_data */
+ struct resource *iobase;
+ /* registers */
+ unsigned short MISCR = 0x9c, UARTBAR = 0x7c;
+ unsigned short PS1BAR = 0x14, POSIO1 = 0x64;
+
+ /* enable IO_Space bit */
+ u32 POSIO_ENABLE = 1 << 31;
+ /* Decoding speed (1 = slow, 2 = medium, 3 = fast) */
+ u32 POSIO_SPEED = 3 << 29;
+
+ iobase = (struct resource*) dev->dev.driver_data;
+ if (iobase == NULL) {
+ printk(KERN_ERR "ite887x: iobase is not available\n");
+ return -ENODEV;
+ }
+
+ /* read the I/O port from the device */
+ ret = pci_read_config_dword(dev, PS1BAR + (0x4 * idx), &ioport);
+ if (ret) {
+ printk(KERN_ERR "ite887x: read error PS%dBAR\n", idx + 1);
+ ret = -ENODEV;
+ goto release_inta;
+ }
+
+ ioport &= 0x0000FF00; /* the actual I/O space base address */
+ ret = pci_write_config_dword(dev, POSIO1 + (0x4 * idx),
+ POSIO_ENABLE | POSIO_SPEED | ioport);
+ if (ret) {
+ printk(KERN_ERR "ite887x: write error PSIO%d+\n", idx + 1);
+ ret = -ENODEV;
+ goto release_inta;
+ }
+
+ /* write the ioport to the UARTBAR */
+ ret = pci_read_config_dword(dev, UARTBAR, &uartbar);
+ if (ret) {
+ printk(KERN_ERR "ite887x: read error UARTBAR\n");
+ ret = -ENODEV;
+ goto release_inta;
+ }
+ uartbar &= ~(15 << (4 * idx)); /* clear half the reg */
+ uartbar |= ioport << (16 * idx); /* set the ioport */
+ ret = pci_write_config_dword(dev, UARTBAR, uartbar);
+ if (ret) {
+ printk(KERN_ERR "ite887x: write error UARTBAR\n");
+ ret = -ENODEV;
+ goto release_inta;
+ }
+
+ /* get current config */
+ ret = pci_read_config_dword(dev, MISCR, &miscr);
+ if (ret) {
+ printk(KERN_ERR "ite887x: read error MISCR\n");
+ ret = -ENODEV;
+ goto release_inta;
+ }
+
+ /* disable interrupts (UARTx_Routing[3:0]) */
+ miscr &= ~(0xf << (12 - 4 * idx));
+ /* activate the UART (UARTx_En) */
+ miscr |= 1 << (23 - idx);
+
+ /* write new config with activated UART */
+ ret = pci_write_config_dword(dev, MISCR, miscr);
+ if (ret) {
+ printk(KERN_ERR "ite887x: write error MISCR\n");
+ ret = -ENODEV;
+ goto release_inta;
+ }
+
+ /* idx + 1: using POSIO1 and up */
+ return setup_port(priv, port, idx + 1, board->first_offset, 0);
+
+release_inta:
+ /* release region again if we get here */
+ release_resource(iobase);
+ dev->dev.driver_data = NULL;
+ return ret;
+}
+
+static void __devexit pci_ite887x_exit(struct pci_dev *dev)
+{
+ /* free the private driver data */
+ release_resource(((struct resource*) dev->dev.driver_data));
+}
+
static int
pci_default_setup(struct serial_private *priv, struct pciserial_board *board,
struct uart_port *port, int idx)
@@ -654,6 +822,18 @@ static struct pci_serial_quirk pci_seria
.setup = pci_default_setup,
},
/*
+ * ITE
+ */
+ {
+ .vendor = PCI_VENDOR_ID_ITE,
+ .device = PCI_DEVICE_ID_ITE_8872,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .init = pci_ite887x_init,
+ .setup = pci_ite887x_setup,
+ .exit = __devexit_p(pci_ite887x_exit),
+ },
+ /*
* Panacom
*/
{
@@ -968,6 +1148,7 @@ enum pci_board_num_t {
pbn_plx_romulus,
pbn_oxsemi,
pbn_intel_i960,
+ pbn_ite_887x,
pbn_sgi_ioc3,
pbn_nec_nile4,
pbn_computone_4,
@@ -1430,6 +1611,15 @@ static struct pciserial_board pci_boards
},
/*
+ * ITE
+ */
+ [pbn_ite_887x] = {
+ .flags = FL_BASE0 | FL_BASE_BARS,
+ .base_baud = 115200,
+ .uart_offset = 8,
+ },
+
+ /*
* NEC Vrc-5074 (Nile 4) builtin UART.
*/
[pbn_nec_nile4] = {
@@ -2370,6 +2560,13 @@ static struct pci_device_id serial_pci_t
{ PCI_VENDOR_ID_TOPIC, PCI_DEVICE_ID_TOPIC_TP560,
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b0_1_115200 },
+ /*
+ * ITE
+ */
+ { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_ite_887x },
/*
* IntaShield IS-200
-
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