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MIPS: Octeon: Use device tree to register serial ports.

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Switch to using the device tree to register serial ports.

Add all the ports with compatible = "cavium,octeon-3860-uart".  Octeon serial
ports have their own device type, required port flags, and I/O
functions, so using of_serial.c is not indicated.

We need to do this as late_initcall, as the 8250 driver must be
initialized before we add any ports.  8250 initialization is done at
device_initcall time.

The OCTEON_IRQ_UART{0,1,2} symbols are removed as they are now unused
and interfere with irq_domain used by the device tree code.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: linux-mips@linux-mips.org
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: linux-kernel@vger.kernel.org
Cc: David Daney <david.daney@cavium.com>
Patchwork: https://patchwork.linux-mips.org/patch/3942/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
David Daney 2012-07-05 18:12:40 +02:00 committed by Ralf Baechle
parent df9244c536
commit b59b284101
2 changed files with 58 additions and 90 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
arch/mips/cavium-octeon/octeon-irq.c
View file

@ -1184,9 +1184,6 @@ static void __init octeon_irq_init_ciu(void)
octeon_irq_set_ciu_mapping(OCTEON_IRQ_MBOX0, 0, 32, chip_mbox, handle_percpu_irq);
octeon_irq_set_ciu_mapping(OCTEON_IRQ_MBOX1, 0, 33, chip_mbox, handle_percpu_irq);
octeon_irq_set_ciu_mapping(OCTEON_IRQ_UART0, 0, 34, chip, handle_level_irq);
octeon_irq_set_ciu_mapping(OCTEON_IRQ_UART1, 0, 35, chip, handle_level_irq);
for (i = 0; i < 4; i++)
octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_PCI_INT0, 0, i + 36, chip, handle_level_irq);
for (i = 0; i < 4; i++)
@ -1203,7 +1200,6 @@ static void __init octeon_irq_init_ciu(void)
for (i = 0; i < 16; i++)
octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_WDOG0, 1, i + 0, chip_wd, handle_level_irq);
octeon_irq_set_ciu_mapping(OCTEON_IRQ_UART2, 1, 16, chip, handle_level_irq);
octeon_irq_set_ciu_mapping(OCTEON_IRQ_USB1, 1, 17, chip, handle_level_irq);
gpio_node = of_find_compatible_node(NULL, NULL, "cavium,octeon-3860-gpio");

144
arch/mips/cavium-octeon/serial.c
View file

@ -43,95 +43,67 @@ void octeon_serial_out(struct uart_port *up, int offset, int value)
cvmx_write_csr((uint64_t)(up->membase + (offset << 3)), (u8)value);
}
/*
* Allocated in .bss, so it is all zeroed.
*/
#define OCTEON_MAX_UARTS 3
static struct plat_serial8250_port octeon_uart8250_data[OCTEON_MAX_UARTS + 1];
static struct platform_device octeon_uart8250_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = octeon_uart8250_data,
static int __devinit octeon_serial_probe(struct platform_device *pdev)
{
int irq, res;
struct resource *res_mem;
struct uart_port port;
/* All adaptors have an irq. */
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
memset(&port, 0, sizeof(port));
port.flags = ASYNC_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE;
port.type = PORT_OCTEON;
port.iotype = UPIO_MEM;
port.regshift = 3;
port.dev = &pdev->dev;
if (octeon_is_simulation())
/* Make simulator output fast*/
port.uartclk = 115200 * 16;
else
port.uartclk = octeon_get_io_clock_rate();
port.serial_in = octeon_serial_in;
port.serial_out = octeon_serial_out;
port.irq = irq;
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res_mem == NULL) {
dev_err(&pdev->dev, "found no memory resource\n");
return -ENXIO;
}
port.mapbase = res_mem->start;
port.membase = ioremap(res_mem->start, resource_size(res_mem));
res = serial8250_register_port(&port);
return res >= 0 ? 0 : res;
}
static struct of_device_id octeon_serial_match[] = {
{
.compatible = "cavium,octeon-3860-uart",
},
{},
};
MODULE_DEVICE_TABLE(of, octeon_serial_match);
static struct platform_driver octeon_serial_driver = {
.probe = octeon_serial_probe,
.driver = {
.owner = THIS_MODULE,
.name = "octeon_serial",
.of_match_table = octeon_serial_match,
},
};
static void __init octeon_uart_set_common(struct plat_serial8250_port *p)
{
p->flags = ASYNC_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE;
p->type = PORT_OCTEON;
p->iotype = UPIO_MEM;
p->regshift = 3; /* I/O addresses are every 8 bytes */
if (octeon_is_simulation())
/* Make simulator output fast*/
p->uartclk = 115200 * 16;
else
p->uartclk = octeon_get_io_clock_rate();
p->serial_in = octeon_serial_in;
p->serial_out = octeon_serial_out;
}
static int __init octeon_serial_init(void)
{
int enable_uart0;
int enable_uart1;
int enable_uart2;
struct plat_serial8250_port *p;
#ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL
/*
* If we are configured to run as the second of two kernels,
* disable uart0 and enable uart1. Uart0 is owned by the first
* kernel
*/
enable_uart0 = 0;
enable_uart1 = 1;
#else
/*
* We are configured for the first kernel. We'll enable uart0
* if the bootloader told us to use 0, otherwise will enable
* uart 1.
*/
enable_uart0 = (octeon_get_boot_uart() == 0);
enable_uart1 = (octeon_get_boot_uart() == 1);
#ifdef CONFIG_KGDB
enable_uart1 = 1;
#endif
#endif
/* Right now CN52XX is the only chip with a third uart */
enable_uart2 = OCTEON_IS_MODEL(OCTEON_CN52XX);
p = octeon_uart8250_data;
if (enable_uart0) {
/* Add a ttyS device for hardware uart 0 */
octeon_uart_set_common(p);
p->membase = (void *) CVMX_MIO_UARTX_RBR(0);
p->mapbase = CVMX_MIO_UARTX_RBR(0) & ((1ull << 49) - 1);
p->irq = OCTEON_IRQ_UART0;
p++;
}
if (enable_uart1) {
/* Add a ttyS device for hardware uart 1 */
octeon_uart_set_common(p);
p->membase = (void *) CVMX_MIO_UARTX_RBR(1);
p->mapbase = CVMX_MIO_UARTX_RBR(1) & ((1ull << 49) - 1);
p->irq = OCTEON_IRQ_UART1;
p++;
}
if (enable_uart2) {
/* Add a ttyS device for hardware uart 2 */
octeon_uart_set_common(p);
p->membase = (void *) CVMX_MIO_UART2_RBR;
p->mapbase = CVMX_MIO_UART2_RBR & ((1ull << 49) - 1);
p->irq = OCTEON_IRQ_UART2;
p++;
}
BUG_ON(p > &octeon_uart8250_data[OCTEON_MAX_UARTS]);
return platform_device_register(&octeon_uart8250_device);
return platform_driver_register(&octeon_serial_driver);
}
device_initcall(octeon_serial_init);
late_initcall(octeon_serial_init);