ARM: SPEAr3xx: Add device-tree support to SPEAr3xx architecture

This patch adds a generic target for SPEAr3xx machines that can be configured
via the device-tree. Currently the following devices are supported via the
devicetree:

- VIC interrupts
- PL011 UART
- PL061 GPIO
- PL110 CLCD
- SP805 WDT
- Synopsys DW I2C
- Synopsys DW ethernet
- ST FSMC-NAND
- ST SPEAR-SMI
- ST SPEAR-KEYBOARD
- ST SPEAR-RTC
- ARASAN SDHCI-SPEAR
- SPEAR-EHCI
- SPEAR-OHCI

Other peripheral devices will follow in later patches.

This also removes IO_ADDRESS macro and creates 16 MB static mappings instead of
4K for individual peripherals. This is done to have efficient TLB lookup for any
I/O windows that are located closely together. ioremap() on this range will
return this mapping only instead of creating another.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>

1 files changed, 109 insertions, 18 deletions

diff --git a/arch/arm/mach-spear3xx/spear320.c b/arch/arm/mach-spear3xx/spear320.c
index 7bd39c0032bd..9c571d0f20c3 100644
--- a/arch/arm/mach-spear3xx/spear320.c
+++ b/arch/arm/mach-spear3xx/spear320.c
@@ -3,8 +3,8 @@
  *
  * SPEAr320 machine source file
  *
- * Copyright (C) 2009 ST Microelectronics
- * Viresh Kumar<viresh.kumar@st.com>
+ * Copyright (C) 2009-2012 ST Microelectronics
+ * Viresh Kumar <viresh.kumar@st.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
@@ -13,8 +13,12 @@
 
 #define pr_fmt(fmt) "SPEAr320: " fmt
 
-#include <linux/ptrace.h>
-#include <asm/irq.h>
+#include <linux/amba/pl022.h>
+#include <linux/amba/pl08x.h>
+#include <linux/amba/serial.h>
+#include <linux/of_platform.h>
+#include <asm/hardware/vic.h>
+#include <asm/mach/arch.h>
 #include <plat/shirq.h>
 #include <mach/generic.h>
 #include <mach/hardware.h>
@@ -510,17 +514,79 @@ static struct spear_shirq shirq_intrcomm_ras = {
 	},
 };
 
-/* Add spear320 specific devices here */
+/* padmux devices to enable */
+static struct pmx_dev *spear320_evb_pmx_devs[] = {
+	/* spear3xx specific devices */
+	&spear3xx_pmx_i2c,
+	&spear3xx_pmx_ssp,
+	&spear3xx_pmx_mii,
+	&spear3xx_pmx_uart0,
+
+	/* spear320 specific devices */
+	&spear320_pmx_fsmc,
+	&spear320_pmx_sdhci,
+	&spear320_pmx_i2s,
+	&spear320_pmx_uart1,
+	&spear320_pmx_uart2,
+	&spear320_pmx_can,
+	&spear320_pmx_pwm0,
+	&spear320_pmx_pwm1,
+	&spear320_pmx_pwm2,
+	&spear320_pmx_mii1,
+};
+
+static struct pl022_ssp_controller spear320_ssp_data[] = {
+	{
+		.bus_id = 1,
+		.enable_dma = 1,
+		.dma_filter = pl08x_filter_id,
+		.dma_tx_param = "ssp1_tx",
+		.dma_rx_param = "ssp1_rx",
+		.num_chipselect = 2,
+	}, {
+		.bus_id = 2,
+		.enable_dma = 1,
+		.dma_filter = pl08x_filter_id,
+		.dma_tx_param = "ssp2_tx",
+		.dma_rx_param = "ssp2_rx",
+		.num_chipselect = 2,
+	}
+};
+
+static struct amba_pl011_data spear320_uart_data[] = {
+	{
+		.dma_filter = pl08x_filter_id,
+		.dma_tx_param = "uart1_tx",
+		.dma_rx_param = "uart1_rx",
+	}, {
+		.dma_filter = pl08x_filter_id,
+		.dma_tx_param = "uart2_tx",
+		.dma_rx_param = "uart2_rx",
+	},
+};
 
-/* spear320 routines */
-void __init spear320_init(struct pmx_mode *pmx_mode, struct pmx_dev **pmx_devs,
-		u8 pmx_dev_count)
+/* Add SPEAr310 auxdata to pass platform data */
+static struct of_dev_auxdata spear320_auxdata_lookup[] __initdata = {
+	OF_DEV_AUXDATA("arm,pl022", SPEAR3XX_ICM1_SSP_BASE, NULL,
+			&pl022_plat_data),
+	OF_DEV_AUXDATA("arm,pl022", SPEAR320_SSP0_BASE, NULL,
+			&spear320_ssp_data[0]),
+	OF_DEV_AUXDATA("arm,pl022", SPEAR320_SSP1_BASE, NULL,
+			&spear320_ssp_data[1]),
+	OF_DEV_AUXDATA("arm,pl011", SPEAR320_UART1_BASE, NULL,
+			&spear320_uart_data[0]),
+	OF_DEV_AUXDATA("arm,pl011", SPEAR320_UART2_BASE, NULL,
+			&spear320_uart_data[1]),
+	{}
+};
+
+static void __init spear320_dt_init(void)
 {
 	void __iomem *base;
 	int ret = 0;
 
-	/* call spear3xx family common init function */
-	spear3xx_init();
+	of_platform_populate(NULL, of_default_bus_match_table,
+			spear320_auxdata_lookup, NULL);
 
 	/* shared irq registration */
 	base = ioremap(SPEAR320_SOC_CONFIG_BASE, SZ_4K);
@@ -544,13 +610,38 @@ void __init spear320_init(struct pmx_mode *pmx_mode, struct pmx_dev **pmx_devs,
 			pr_err("Error registering Shared IRQ 4\n");
 	}
 
-	/* pmx initialization */
-	pmx_driver.base = base;
-	pmx_driver.mode = pmx_mode;
-	pmx_driver.devs = pmx_devs;
-	pmx_driver.devs_count = pmx_dev_count;
+	if (of_machine_is_compatible("st,spear320-evb")) {
+		/* pmx initialization */
+		pmx_driver.base = base;
+		pmx_driver.mode = &spear320_auto_net_mii_mode;
+		pmx_driver.devs = spear320_evb_pmx_devs;
+		pmx_driver.devs_count = ARRAY_SIZE(spear320_evb_pmx_devs);
 
-	ret = pmx_register(&pmx_driver);
-	if (ret)
-		pr_err("padmux: registration failed. err no: %d\n", ret);
+		ret = pmx_register(&pmx_driver);
+		if (ret)
+			pr_err("padmux: registration failed. err no: %d\n",
+					ret);
+	}
 }
+
+static const char * const spear320_dt_board_compat[] = {
+	"st,spear320",
+	"st,spear320-evb",
+	NULL,
+};
+
+static void __init spear320_map_io(void)
+{
+	spear3xx_map_io();
+	spear320_clk_init();
+}
+
+DT_MACHINE_START(SPEAR320_DT, "ST SPEAr320 SoC with Flattened Device Tree")
+	.map_io		=	spear320_map_io,
+	.init_irq	=	spear3xx_dt_init_irq,
+	.handle_irq	=	vic_handle_irq,
+	.timer		=	&spear3xx_timer,
+	.init_machine	=	spear320_dt_init,
+	.restart	=	spear_restart,
+	.dt_compat	=	spear320_dt_board_compat,
+MACHINE_END