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parisc: fix serial ports on C8000 workstation

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The C8000 workstation (64 bit kernel only) has a somewhat different
serial port configuration than other models.
Thomas Bogendoerfer sent a patch to fix this in September 2010, which
was now minimally modified by me.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Thomas Bogendoerfer 2013-06-09 23:00:21 +02:00 committed by Helge Deller
parent 91ea820716
commit 9a66d1869d
3 changed files with 76 additions and 1 deletions
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1
arch/parisc/kernel/hardware.c
View File

@ -1205,6 +1205,7 @@ static struct hp_hardware hp_hardware_list[] = {
{HPHW_FIO, 0x004, 0x00320, 0x0, "Metheus Frame Buffer"},
{HPHW_FIO, 0x004, 0x00340, 0x0, "BARCO CX4500 VME Grphx Cnsl"},
{HPHW_FIO, 0x004, 0x00360, 0x0, "Hughes TOG VME FDDI"},
{HPHW_FIO, 0x076, 0x000AD, 0x00, "Crestone Peak RS-232"},
{HPHW_IOA, 0x185, 0x0000B, 0x00, "Java BC Summit Port"},
{HPHW_IOA, 0x1FF, 0x0000B, 0x00, "Hitachi Ghostview Summit Port"},
{HPHW_IOA, 0x580, 0x0000B, 0x10, "U2-IOA BC Runway Port"},

66
drivers/parisc/iosapic.c
View File

@ -811,6 +811,70 @@ int iosapic_fixup_irq(void *isi_obj, struct pci_dev *pcidev)
return pcidev->irq;
}
static struct iosapic_info *first_isi = NULL;
#ifdef CONFIG_64BIT
int iosapic_serial_irq(int num)
{
struct iosapic_info *isi = first_isi;
struct irt_entry *irte = NULL; /* only used if PAT PDC */
struct vector_info *vi;
int isi_line; /* line used by device */
/* lookup IRT entry for isi/slot/pin set */
irte = &irt_cell[num];
DBG_IRT("iosapic_serial_irq(): irte %p %x %x %x %x %x %x %x %x\n",
irte,
irte->entry_type,
irte->entry_length,
irte->polarity_trigger,
irte->src_bus_irq_devno,
irte->src_bus_id,
irte->src_seg_id,
irte->dest_iosapic_intin,
(u32) irte->dest_iosapic_addr);
isi_line = irte->dest_iosapic_intin;
/* get vector info for this input line */
vi = isi->isi_vector + isi_line;
DBG_IRT("iosapic_serial_irq: line %d vi 0x%p\n", isi_line, vi);
/* If this IRQ line has already been setup, skip it */
if (vi->irte)
goto out;
vi->irte = irte;
/*
* Allocate processor IRQ
*
* XXX/FIXME The txn_alloc_irq() code and related code should be
* moved to enable_irq(). That way we only allocate processor IRQ
* bits for devices that actually have drivers claiming them.
* Right now we assign an IRQ to every PCI device present,
* regardless of whether it's used or not.
*/
vi->txn_irq = txn_alloc_irq(8);
if (vi->txn_irq < 0)
panic("I/O sapic: couldn't get TXN IRQ\n");
/* enable_irq() will use txn_* to program IRdT */
vi->txn_addr = txn_alloc_addr(vi->txn_irq);
vi->txn_data = txn_alloc_data(vi->txn_irq);
vi->eoi_addr = isi->addr + IOSAPIC_REG_EOI;
vi->eoi_data = cpu_to_le32(vi->txn_data);
cpu_claim_irq(vi->txn_irq, &iosapic_interrupt_type, vi);
out:
return vi->txn_irq;
}
#endif
/*
** squirrel away the I/O Sapic Version
@ -877,6 +941,8 @@ void *iosapic_register(unsigned long hpa)
vip->irqline = (unsigned char) cnt;
vip->iosapic = isi;
}
if (!first_isi)
first_isi = isi;
return isi;
}

10
drivers/tty/serial/8250/8250_gsc.c
View File

@ -30,6 +30,12 @@ static int __init serial_init_chip(struct parisc_device *dev)
unsigned long address;
int err;
#ifdef CONFIG_64BIT
extern int iosapic_serial_irq(int cellnum);
if (!dev->irq && (dev->id.sversion == 0xad))
dev->irq = iosapic_serial_irq(dev->mod_index-1);
#endif
if (!dev->irq) {
/* We find some unattached serial ports by walking native
* busses. These should be silently ignored. Otherwise,
@ -51,7 +57,8 @@ static int __init serial_init_chip(struct parisc_device *dev)
memset(&uart, 0, sizeof(uart));
uart.port.iotype = UPIO_MEM;
/* 7.272727MHz on Lasi. Assumed the same for Dino, Wax and Timi. */
uart.port.uartclk = 7272727;
uart.port.uartclk = (dev->id.sversion != 0xad) ?
7272727 : 1843200;
uart.port.mapbase = address;
uart.port.membase = ioremap_nocache(address, 16);
uart.port.irq = dev->irq;
@ -73,6 +80,7 @@ static struct parisc_device_id serial_tbl[] = {
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x000ad },
{ 0 }
};