Commit 13e886c3 authored by Kumar Gala's avatar Kumar Gala Committed by Linus Torvalds
Browse files

[PATCH] ppc32: Make the UARTs on MPC824x individual platform devices 



The UARTs on the MPC824x are unique devices and really shouldn't be thought
of as a DUART.  In addition, if both UARTs are in use we need to configure
the part to enable the 2nd UART since the pins for the UARTs are
multiplexed.  Adds support to run the 824x Sandpoint with both UARTs if
desired.

Signed-off-by: default avatarMatt McClintock <msm@freescale.com>
Signed-off-by: default avatarKumar Gala <kumar.gala@freescale.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent d054b5ac

arch/ppc/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -878,6 +878,13 @@ config MPC10X_STORE_GATHERING 
	bool "Enable MPC10x store gathering"

	depends on MPC10X_BRIDGE



config SANDPOINT_ENABLE_UART1

	bool "Enable DUART mode on Sandpoint"

	depends on SANDPOINT

	help

	  If this option is enabled then the MPC824x processor will run

	  in DUART mode instead of UART mode.



config CPC710_DATA_GATHERING

	bool "Enable CPC710 data gathering"

	depends on K2

arch/ppc/configs/sandpoint_defconfig

+1 −1
Original line number Diff line number Diff line
@@ -437,7 +437,7 @@ CONFIG_SOUND_GAMEPORT=y 
#

CONFIG_SERIAL_8250=y

CONFIG_SERIAL_8250_CONSOLE=y

CONFIG_SERIAL_8250_NR_UARTS=2

CONFIG_SERIAL_8250_NR_UARTS=4

# CONFIG_SERIAL_8250_EXTENDED is not set



#

arch/ppc/platforms/sandpoint.c

+10 −7
Original line number Diff line number Diff line
@@ -311,19 +311,22 @@ sandpoint_setup_arch(void) 
	{

		bd_t *bp = (bd_t *)__res;

		struct plat_serial8250_port *pdata;

		pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC10X_DUART);



		pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC10X_UART0);

		if (pdata)

		{

			pdata[0].uartclk = bp->bi_busfreq;

			pdata[0].membase = ioremap(pdata[0].mapbase, 0x100);

		}



			/* this disables the 2nd serial port on the DUART

			 * since the sandpoint does not have it connected */

			pdata[1].uartclk = 0;

			pdata[1].irq = 0;

			pdata[1].mapbase = 0;

#ifdef CONFIG_SANDPOINT_ENABLE_UART1

		pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC10X_UART1);

		if (pdata)

		{

			pdata[0].uartclk = bp->bi_busfreq;

		}

#else

		ppc_sys_device_remove(MPC10X_UART1);

#endif

	}



	printk(KERN_INFO "Motorola SPS Sandpoint Test Platform\n");

arch/ppc/syslib/mpc10x_common.c

+43 −10
Original line number Diff line number Diff line
@@ -45,24 +45,29 @@ 
#define MPC10X_DMA0_IRQ (EPIC_IRQ_BASE + 1 + NUM_8259_INTERRUPTS)

#define MPC10X_DMA1_IRQ (EPIC_IRQ_BASE + 2 + NUM_8259_INTERRUPTS)

#define MPC10X_UART0_IRQ (EPIC_IRQ_BASE + 4 + NUM_8259_INTERRUPTS)

#define MPC10X_UART1_IRQ (EPIC_IRQ_BASE + 5 + NUM_8259_INTERRUPTS)

#else

#define MPC10X_I2C_IRQ -1

#define MPC10X_DMA0_IRQ -1

#define MPC10X_DMA1_IRQ -1

#define MPC10X_UART0_IRQ -1

#define MPC10X_UART1_IRQ -1

#endif



static struct fsl_i2c_platform_data mpc10x_i2c_pdata = {

	.device_flags		= 0,

};



static struct plat_serial8250_port serial_platform_data[] = {

static struct plat_serial8250_port serial_plat_uart0[] = {

	[0] = {

		.mapbase	= 0x4500,

		.iotype		= UPIO_MEM,

		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,

	},

	[1] = {

	{ },

};

static struct plat_serial8250_port serial_plat_uart1[] = {

	[0] = {

		.mapbase	= 0x4600,

		.iotype		= UPIO_MEM,

		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
@@ -133,11 +138,17 @@ struct platform_device ppc_sys_platform_devices[] = { 
			},

		},

	},

	[MPC10X_DUART] = {

	[MPC10X_UART0] = {

		.name = "serial8250",

		.id	= 0,

		.dev.platform_data = serial_platform_data,

		.dev.platform_data = serial_plat_uart0,

	},

	[MPC10X_UART1] = {

		.name = "serial8250",

		.id	= 1,

		.dev.platform_data = serial_plat_uart1,

	},



};



/* We use the PCI ID to match on */
@@ -147,10 +158,10 @@ struct ppc_sys_spec ppc_sys_specs[] = { 
		.ppc_sys_name 	= "8245",

		.mask		= 0xFFFFFFFF,

		.value		= MPC10X_BRIDGE_8245,

		.num_devices	= 4,

		.num_devices	= 5,

		.device_list	= (enum ppc_sys_devices[])

		{

			MPC10X_IIC1, MPC10X_DMA0, MPC10X_DMA1, MPC10X_DUART,

			MPC10X_IIC1, MPC10X_DMA0, MPC10X_DMA1, MPC10X_UART0, MPC10X_UART1,

		},

	},

	{
@@ -180,6 +191,25 @@ struct ppc_sys_spec ppc_sys_specs[] = { 
	},

};



/*

 * mach_mpc10x_fixup: This function enables DUART mode if it detects

 * if it detects two UARTS in the platform device entries.

 */

static int __init mach_mpc10x_fixup(struct platform_device *pdev)

{

	if (strncmp (pdev->name, "serial8250", 10) == 0 && pdev->id == 1)

		writeb(readb(serial_plat_uart1[0].membase + 0x11) | 0x1,

				serial_plat_uart1[0].membase + 0x11);

	return 0;

}



static int __init mach_mpc10x_init(void)

{

	ppc_sys_device_fixup = mach_mpc10x_fixup;

	return 0;

}

postcore_initcall(mach_mpc10x_init);



/* Set resources to match bridge memory map */

void __init

mpc10x_bridge_set_resources(int map, struct pci_controller *hose)
@@ -219,6 +249,7 @@ mpc10x_bridge_set_resources(int map, struct pci_controller *hose) 
				ppc_md.progress("mpc10x:exit1", 0x100);

	}

}



/*

 * Do some initialization and put the EUMB registers at the specified address

 * (also map the EPIC registers into virtual space--OpenPIC_Addr will be set).
@@ -411,11 +442,13 @@ mpc10x_bridge_init(struct pci_controller *hose, 
	ppc_sys_platform_devices[MPC10X_DMA1].resource[1].start = MPC10X_DMA1_IRQ;

	ppc_sys_platform_devices[MPC10X_DMA1].resource[1].end = MPC10X_DMA1_IRQ;



	serial_platform_data[0].mapbase += phys_eumb_base;

	serial_platform_data[0].irq = MPC10X_UART0_IRQ;

	serial_plat_uart0[0].mapbase += phys_eumb_base;

	serial_plat_uart0[0].irq = MPC10X_UART0_IRQ;

	serial_plat_uart0[0].membase = ioremap(serial_plat_uart0[0].mapbase, 0x100);



	serial_platform_data[1].mapbase += phys_eumb_base;

	serial_platform_data[1].irq = MPC10X_UART0_IRQ + 1;

	serial_plat_uart1[0].mapbase += phys_eumb_base;

	serial_plat_uart1[0].irq = MPC10X_UART1_IRQ;

	serial_plat_uart1[0].membase = ioremap(serial_plat_uart1[0].mapbase, 0x100);



	/*

	 * 8240 erratum 26, 8241/8245 erratum 29, 107 erratum 23: speculative

include/asm-ppc/mpc10x.h

+2 −1
Original line number Diff line number Diff line
@@ -163,7 +163,8 @@ enum ppc_sys_devices { 
	MPC10X_IIC1,

	MPC10X_DMA0,

	MPC10X_DMA1,

	MPC10X_DUART,

	MPC10X_UART0,

	MPC10X_UART1,

};



int mpc10x_bridge_init(struct pci_controller *hose,

CRA Git | Maintained and supported by SUSTech CRA and CCSE