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| author | Arnd Bergmann <arnd@arndb.de> | 2011-06-27 15:45:16 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-09-20 03:19:39 +0400 |
| commit | 7df5659eefad9b6d457ccdee016bd78bd064cfc0 (patch) | |
| tree | a395754d6df1a3d211843a8dd178f865be42fe8a /arch/powerpc | |
| parent | 2eccacd0974dca73e2151d3fd4c2dacf1a5c7cc2 (diff) | |
| download | linux-7df5659eefad9b6d457ccdee016bd78bd064cfc0.tar.xz | |
serial/8250: Move UPIO_TSI to powerpc
This iotype is only used by the legacy_serial code in powerpc, so the
code should live there, rather than be compiled in for every 8250
driver.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: linux-serial@vger.kernel.org
Acked-by: David Daney <david.daney@cavium.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/legacy_serial.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c index 2b97b80d6d7d..c7b5afeecaf2 100644 --- a/arch/powerpc/kernel/legacy_serial.c +++ b/arch/powerpc/kernel/legacy_serial.c @@ -6,6 +6,7 @@ #include <linux/pci.h> #include <linux/of_address.h> #include <linux/of_device.h> +#include <linux/serial_reg.h> #include <asm/io.h> #include <asm/mmu.h> #include <asm/prom.h> @@ -47,6 +48,24 @@ static struct __initdata of_device_id legacy_serial_parents[] = { static unsigned int legacy_serial_count; static int legacy_serial_console = -1; +static unsigned int tsi_serial_in(struct uart_port *p, int offset) +{ + unsigned int tmp; + offset = offset << p->regshift; + if (offset == UART_IIR) { + tmp = readl(p->membase + (UART_IIR & ~3)); + return (tmp >> 16) & 0xff; /* UART_IIR % 4 == 2 */ + } else + return readb(p->membase + offset); +} + +static void tsi_serial_out(struct uart_port *p, int offset, int value) +{ + offset = offset << p->regshift; + if (!((offset == UART_IER) && (value & UART_IER_UUE))) + writeb(value, p->membase + offset); +} + 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, @@ -102,6 +121,7 @@ static int __init add_legacy_port(struct device_node *np, int want_index, legacy_serial_ports[index].iobase = base; else legacy_serial_ports[index].mapbase = base; + legacy_serial_ports[index].iotype = iotype; legacy_serial_ports[index].uartclk = clock; legacy_serial_ports[index].irq = irq; @@ -112,6 +132,11 @@ static int __init add_legacy_port(struct device_node *np, int want_index, legacy_serial_infos[index].speed = spd ? be32_to_cpup(spd) : 0; legacy_serial_infos[index].irq_check_parent = irq_check_parent; + if (iotype == UPIO_TSI) { + legacy_serial_ports[index].serial_in = tsi_serial_in; + legacy_serial_ports[index].serial_out = tsi_serial_out; + } + printk(KERN_DEBUG "Found legacy serial port %d for %s\n", index, np->full_name); printk(KERN_DEBUG " %s=%llx, taddr=%llx, irq=%lx, clk=%d, speed=%d\n", |