arch/powerpc/platforms/8xx/tqm8xx_setup.c

Source file repositories/reference/linux-study-clean/arch/powerpc/platforms/8xx/tqm8xx_setup.c

File Facts

System
Linux kernel
Corpus path
arch/powerpc/platforms/8xx/tqm8xx_setup.c
Extension
.c
Size
3592 bytes
Lines
149
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct cpm_pin {
	int port, pin, flags;
};

static struct cpm_pin tqm8xx_pins[] __initdata = {
	/* SMC1 */
	{CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
	{CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */

	/* SCC1 */
	{CPM_PORTA, 5, CPM_PIN_INPUT}, /* CLK1 */
	{CPM_PORTA, 7, CPM_PIN_INPUT}, /* CLK2 */
	{CPM_PORTA, 14, CPM_PIN_INPUT}, /* TX */
	{CPM_PORTA, 15, CPM_PIN_INPUT}, /* RX */
	{CPM_PORTC, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */
	{CPM_PORTC, 10, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO},
	{CPM_PORTC, 11, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO},
};

static struct cpm_pin tqm8xx_fec_pins[] __initdata = {
	/* MII */
	{CPM_PORTD, 3, CPM_PIN_OUTPUT},
	{CPM_PORTD, 4, CPM_PIN_OUTPUT},
	{CPM_PORTD, 5, CPM_PIN_OUTPUT},
	{CPM_PORTD, 6, CPM_PIN_OUTPUT},
	{CPM_PORTD, 7, CPM_PIN_OUTPUT},
	{CPM_PORTD, 8, CPM_PIN_OUTPUT},
	{CPM_PORTD, 9, CPM_PIN_OUTPUT},
	{CPM_PORTD, 10, CPM_PIN_OUTPUT},
	{CPM_PORTD, 11, CPM_PIN_OUTPUT},
	{CPM_PORTD, 12, CPM_PIN_OUTPUT},
	{CPM_PORTD, 13, CPM_PIN_OUTPUT},
	{CPM_PORTD, 14, CPM_PIN_OUTPUT},
	{CPM_PORTD, 15, CPM_PIN_OUTPUT},
};

static void __init init_pins(int n, struct cpm_pin *pin)
{
	int i;

	for (i = 0; i < n; i++) {
		cpm1_set_pin(pin->port, pin->pin, pin->flags);
		pin++;
	}
}

static void __init init_ioports(void)
{
	struct device_node *dnode;
	struct property *prop;
	int	len;

	init_pins(ARRAY_SIZE(tqm8xx_pins), &tqm8xx_pins[0]);

	cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);

	dnode = of_find_node_by_name(NULL, "aliases");
	if (dnode == NULL)
		return;
	prop = of_find_property(dnode, "ethernet1", &len);

	of_node_put(dnode);

	if (prop == NULL)
		return;

	/* init FEC pins */
	init_pins(ARRAY_SIZE(tqm8xx_fec_pins), &tqm8xx_fec_pins[0]);
}

static void __init tqm8xx_setup_arch(void)
{
	cpm_reset();
	init_ioports();
}

static const struct of_device_id of_bus_ids[] __initconst = {
	{ .name = "soc", },
	{ .name = "cpm", },
	{ .name = "localbus", },
	{ .compatible = "simple-bus" },
	{},
};

static int __init declare_of_platform_devices(void)
{
	of_platform_bus_probe(NULL, of_bus_ids, NULL);

	return 0;
}

Annotation

Implementation Notes