diff options
author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2005-11-29 11:21:59 +1100 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2006-01-09 14:50:58 +1100 |
commit | 8dacaedf04467e32c50148751a96150e73323cdc (patch) | |
tree | 74e8406ee6a78c7cf232858994ee49547c273042 /arch/powerpc/kernel/legacy_serial.c | |
parent | 1c3eb629102bd4e327cc8b08fb9cdae4a985e841 (diff) |
[PATCH] powerpc: More serial probe fixes (#2)
This fixes the new serial probe code with some PCI MMIO UARTs, and fixes
CHRP build with ARCH=powerpc.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/legacy_serial.c')
-rw-r--r-- | arch/powerpc/kernel/legacy_serial.c | 45 |
1 files changed, 34 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c index 7a685cae81e..83023bb59ad 100644 --- a/arch/powerpc/kernel/legacy_serial.c +++ b/arch/powerpc/kernel/legacy_serial.c @@ -38,15 +38,13 @@ static int __init add_legacy_port(struct device_node *np, int want_index, int iotype, phys_addr_t base, phys_addr_t taddr, unsigned long irq) { - u32 *clk, *spd, clock; + u32 *clk, *spd, clock = BASE_BAUD * 16; int index; /* get clock freq. if present */ clk = (u32 *)get_property(np, "clock-frequency", NULL); if (clk && *clk) clock = *clk; - else - clock = BASE_BAUD * 16; /* get default speed if present */ spd = (u32 *)get_property(np, "current-speed", NULL); @@ -88,7 +86,7 @@ static int __init add_legacy_port(struct device_node *np, int want_index, if (iotype == UPIO_PORT) legacy_serial_ports[index].iobase = base; else - legacy_serial_ports[index].membase = (void __iomem *)base; + legacy_serial_ports[index].mapbase = base; legacy_serial_ports[index].iotype = iotype; legacy_serial_ports[index].uartclk = clock; legacy_serial_ports[index].irq = irq; @@ -148,17 +146,17 @@ static int __init add_legacy_pci_port(struct device_node *np, { phys_addr_t addr, base; u32 *addrp; - int iotype, index = -1; + int iotype, index = -1, lindex = 0; -#if 0 /* We only support ports that have a clock frequency properly * encoded in the device-tree (that is have an fcode). Anything * else can't be used that early and will be normally probed by - * the generic 8250_pci driver later on. + * the generic 8250_pci driver later on. The reason is that 8250 + * compatible UARTs on PCI need all sort of quirks (port offsets + * etc...) that this code doesn't know about */ if (get_property(np, "clock-frequency", NULL) == NULL) return -1; -#endif /* Get the PCI address. Assume BAR 0 */ addrp = of_get_pci_address(pci_dev, 0, NULL); @@ -183,7 +181,23 @@ static int __init add_legacy_pci_port(struct device_node *np, if (np != pci_dev) { u32 *reg = (u32 *)get_property(np, "reg", NULL); if (reg && (*reg < 4)) - index = legacy_serial_count + *reg; + index = lindex = *reg; + } + + /* Local index means it's the Nth port in the PCI chip. Unfortunately + * the offset to add here is device specific. We know about those + * EXAR ports and we default to the most common case. If your UART + * doesn't work for these settings, you'll have to add your own special + * cases here + */ + if (device_is_compatible(pci_dev, "pci13a8,152") || + device_is_compatible(pci_dev, "pci13a8,154") || + device_is_compatible(pci_dev, "pci13a8,158")) { + addr += 0x200 * lindex; + base += 0x200 * lindex; + } else { + addr += 8 * lindex; + base += 8 * lindex; } /* Add port, irq will be dealt with later. We passed a translated @@ -264,7 +278,6 @@ void __init find_legacy_serial_ports(void) DBG("legacy_serial_console = %d\n", legacy_serial_console); /* udbg is 64 bits only for now, that will change soon though ... */ -#ifdef CONFIG_PPC64 while (legacy_serial_console >= 0) { struct legacy_serial_info *info = &legacy_serial_infos[legacy_serial_console]; @@ -281,7 +294,6 @@ void __init find_legacy_serial_ports(void) udbg_init_uart(addr, info->speed, info->clock); break; } -#endif /* CONFIG_PPC64 */ DBG(" <- find_legacy_serial_port()\n"); } @@ -343,6 +355,15 @@ static void __init fixup_port_pio(int index, } } +static void __init fixup_port_mmio(int index, + struct device_node *np, + struct plat_serial8250_port *port) +{ + DBG("fixup_port_mmio(%d)\n", index); + + port->membase = ioremap(port->mapbase, 0x100); +} + /* * This is called as an arch initcall, hopefully before the PCI bus is * probed and/or the 8250 driver loaded since we need to register our @@ -377,6 +398,8 @@ static int __init serial_dev_init(void) fixup_port_irq(i, np, port); if (port->iotype == UPIO_PORT) fixup_port_pio(i, np, port); + if (port->iotype == UPIO_MEM) + fixup_port_mmio(i, np, port); } DBG("Registering platform serial ports\n"); |