initial_commit

1 files changed, 404 insertions, 0 deletions

diff --git a/arch/arm/mach-mv78xx0/common.c b/arch/arm/mach-mv78xx0/common.c
new file mode 100644
index 00000000..d90e244e
--- /dev/null
+++ b/arch/arm/mach-mv78xx0/common.c
@@ -0,0 +1,404 @@
+/*
+ * arch/arm/mach-mv78xx0/common.c
+ *
+ * Core functions for Marvell MV78xx0 SoCs
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/serial_8250.h>
+#include <linux/mbus.h>
+#include <linux/ata_platform.h>
+#include <linux/ethtool.h>
+#include <asm/mach/map.h>
+#include <asm/mach/time.h>
+#include <mach/mv78xx0.h>
+#include <mach/bridge-regs.h>
+#include <plat/cache-feroceon-l2.h>
+#include <plat/ehci-orion.h>
+#include <plat/orion_nand.h>
+#include <plat/time.h>
+#include <plat/common.h>
+#include "common.h"
+
+static int get_tclk(void);
+
+/*****************************************************************************
+ * Common bits
+ ****************************************************************************/
+int mv78xx0_core_index(void)
+{
+	u32 extra;
+
+	/*
+	 * Read Extra Features register.
+	 */
+	__asm__("mrc p15, 1, %0, c15, c1, 0" : "=r" (extra));
+
+	return !!(extra & 0x00004000);
+}
+
+static int get_hclk(void)
+{
+	int hclk;
+
+	/*
+	 * HCLK tick rate is configured by DEV_D[7:5] pins.
+	 */
+	switch ((readl(SAMPLE_AT_RESET_LOW) >> 5) & 7) {
+	case 0:
+		hclk = 166666667;
+		break;
+	case 1:
+		hclk = 200000000;
+		break;
+	case 2:
+		hclk = 266666667;
+		break;
+	case 3:
+		hclk = 333333333;
+		break;
+	case 4:
+		hclk = 400000000;
+		break;
+	default:
+		panic("unknown HCLK PLL setting: %.8x\n",
+			readl(SAMPLE_AT_RESET_LOW));
+	}
+
+	return hclk;
+}
+
+static void get_pclk_l2clk(int hclk, int core_index, int *pclk, int *l2clk)
+{
+	u32 cfg;
+
+	/*
+	 * Core #0 PCLK/L2CLK is configured by bits [13:8], core #1
+	 * PCLK/L2CLK by bits [19:14].
+	 */
+	if (core_index == 0) {
+		cfg = (readl(SAMPLE_AT_RESET_LOW) >> 8) & 0x3f;
+	} else {
+		cfg = (readl(SAMPLE_AT_RESET_LOW) >> 14) & 0x3f;
+	}
+
+	/*
+	 * Bits [11:8] ([17:14] for core #1) configure the PCLK:HCLK
+	 * ratio (1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6).
+	 */
+	*pclk = ((u64)hclk * (2 + (cfg & 0xf))) >> 1;
+
+	/*
+	 * Bits [13:12] ([19:18] for core #1) configure the PCLK:L2CLK
+	 * ratio (1, 2, 3).
+	 */
+	*l2clk = *pclk / (((cfg >> 4) & 3) + 1);
+}
+
+static int get_tclk(void)
+{
+	int tclk;
+
+	/*
+	 * TCLK tick rate is configured by DEV_A[2:0] strap pins.
+	 */
+	switch ((readl(SAMPLE_AT_RESET_HIGH) >> 6) & 7) {
+	case 1:
+		tclk = 166666667;
+		break;
+	case 3:
+		tclk = 200000000;
+		break;
+	default:
+		panic("unknown TCLK PLL setting: %.8x\n",
+			readl(SAMPLE_AT_RESET_HIGH));
+	}
+
+	return tclk;
+}
+
+
+/*****************************************************************************
+ * I/O Address Mapping
+ ****************************************************************************/
+static struct map_desc mv78xx0_io_desc[] __initdata = {
+	{
+		.virtual	= MV78XX0_CORE_REGS_VIRT_BASE,
+		.pfn		= 0,
+		.length		= MV78XX0_CORE_REGS_SIZE,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= MV78XX0_PCIE_IO_VIRT_BASE(0),
+		.pfn		= __phys_to_pfn(MV78XX0_PCIE_IO_PHYS_BASE(0)),
+		.length		= MV78XX0_PCIE_IO_SIZE * 8,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= MV78XX0_REGS_VIRT_BASE,
+		.pfn		= __phys_to_pfn(MV78XX0_REGS_PHYS_BASE),
+		.length		= MV78XX0_REGS_SIZE,
+		.type		= MT_DEVICE,
+	},
+};
+
+void __init mv78xx0_map_io(void)
+{
+	unsigned long phys;
+
+	/*
+	 * Map the right set of per-core registers depending on
+	 * which core we are running on.
+	 */
+	if (mv78xx0_core_index() == 0) {
+		phys = MV78XX0_CORE0_REGS_PHYS_BASE;
+	} else {
+		phys = MV78XX0_CORE1_REGS_PHYS_BASE;
+	}
+	mv78xx0_io_desc[0].pfn = __phys_to_pfn(phys);
+
+	iotable_init(mv78xx0_io_desc, ARRAY_SIZE(mv78xx0_io_desc));
+}
+
+
+/*****************************************************************************
+ * EHCI
+ ****************************************************************************/
+void __init mv78xx0_ehci0_init(void)
+{
+	orion_ehci_init(&mv78xx0_mbus_dram_info,
+			USB0_PHYS_BASE, IRQ_MV78XX0_USB_0, EHCI_PHY_NA);
+}
+
+
+/*****************************************************************************
+ * EHCI1
+ ****************************************************************************/
+void __init mv78xx0_ehci1_init(void)
+{
+	orion_ehci_1_init(&mv78xx0_mbus_dram_info,
+			  USB1_PHYS_BASE, IRQ_MV78XX0_USB_1);
+}
+
+
+/*****************************************************************************
+ * EHCI2
+ ****************************************************************************/
+void __init mv78xx0_ehci2_init(void)
+{
+	orion_ehci_2_init(&mv78xx0_mbus_dram_info,
+			  USB2_PHYS_BASE, IRQ_MV78XX0_USB_2);
+}
+
+
+/*****************************************************************************
+ * GE00
+ ****************************************************************************/
+void __init mv78xx0_ge00_init(struct mv643xx_eth_platform_data *eth_data)
+{
+	orion_ge00_init(eth_data, &mv78xx0_mbus_dram_info,
+			GE00_PHYS_BASE, IRQ_MV78XX0_GE00_SUM,
+			IRQ_MV78XX0_GE_ERR, get_tclk());
+}
+
+
+/*****************************************************************************
+ * GE01
+ ****************************************************************************/
+void __init mv78xx0_ge01_init(struct mv643xx_eth_platform_data *eth_data)
+{
+	orion_ge01_init(eth_data, &mv78xx0_mbus_dram_info,
+			GE01_PHYS_BASE, IRQ_MV78XX0_GE01_SUM,
+			NO_IRQ, get_tclk());
+}
+
+
+/*****************************************************************************
+ * GE10
+ ****************************************************************************/
+void __init mv78xx0_ge10_init(struct mv643xx_eth_platform_data *eth_data)
+{
+	u32 dev, rev;
+
+	/*
+	 * On the Z0, ge10 and ge11 are internally connected back
+	 * to back, and not brought out.
+	 */
+	mv78xx0_pcie_id(&dev, &rev);
+	if (dev == MV78X00_Z0_DEV_ID) {
+		eth_data->phy_addr = MV643XX_ETH_PHY_NONE;
+		eth_data->speed = SPEED_1000;
+		eth_data->duplex = DUPLEX_FULL;
+	}
+
+	orion_ge10_init(eth_data, &mv78xx0_mbus_dram_info,
+			GE10_PHYS_BASE, IRQ_MV78XX0_GE10_SUM,
+			NO_IRQ, get_tclk());
+}
+
+
+/*****************************************************************************
+ * GE11
+ ****************************************************************************/
+void __init mv78xx0_ge11_init(struct mv643xx_eth_platform_data *eth_data)
+{
+	u32 dev, rev;
+
+	/*
+	 * On the Z0, ge10 and ge11 are internally connected back
+	 * to back, and not brought out.
+	 */
+	mv78xx0_pcie_id(&dev, &rev);
+	if (dev == MV78X00_Z0_DEV_ID) {
+		eth_data->phy_addr = MV643XX_ETH_PHY_NONE;
+		eth_data->speed = SPEED_1000;
+		eth_data->duplex = DUPLEX_FULL;
+	}
+
+	orion_ge11_init(eth_data, &mv78xx0_mbus_dram_info,
+			GE11_PHYS_BASE, IRQ_MV78XX0_GE11_SUM,
+			NO_IRQ, get_tclk());
+}
+
+/*****************************************************************************
+ * I2C
+ ****************************************************************************/
+void __init mv78xx0_i2c_init(void)
+{
+	orion_i2c_init(I2C_0_PHYS_BASE, IRQ_MV78XX0_I2C_0, 8);
+	orion_i2c_1_init(I2C_1_PHYS_BASE, IRQ_MV78XX0_I2C_1, 8);
+}
+
+/*****************************************************************************
+ * SATA
+ ****************************************************************************/
+void __init mv78xx0_sata_init(struct mv_sata_platform_data *sata_data)
+{
+	orion_sata_init(sata_data, &mv78xx0_mbus_dram_info,
+			SATA_PHYS_BASE, IRQ_MV78XX0_SATA);
+}
+
+
+/*****************************************************************************
+ * UART0
+ ****************************************************************************/
+void __init mv78xx0_uart0_init(void)
+{
+	orion_uart0_init(UART0_VIRT_BASE, UART0_PHYS_BASE,
+			 IRQ_MV78XX0_UART_0, get_tclk());
+}
+
+
+/*****************************************************************************
+ * UART1
+ ****************************************************************************/
+void __init mv78xx0_uart1_init(void)
+{
+	orion_uart1_init(UART1_VIRT_BASE, UART1_PHYS_BASE,
+			 IRQ_MV78XX0_UART_1, get_tclk());
+}
+
+
+/*****************************************************************************
+ * UART2
+ ****************************************************************************/
+void __init mv78xx0_uart2_init(void)
+{
+	orion_uart2_init(UART2_VIRT_BASE, UART2_PHYS_BASE,
+			 IRQ_MV78XX0_UART_2, get_tclk());
+}
+
+/*****************************************************************************
+ * UART3
+ ****************************************************************************/
+void __init mv78xx0_uart3_init(void)
+{
+	orion_uart3_init(UART3_VIRT_BASE, UART3_PHYS_BASE,
+			 IRQ_MV78XX0_UART_3, get_tclk());
+}
+
+/*****************************************************************************
+ * Time handling
+ ****************************************************************************/
+void __init mv78xx0_init_early(void)
+{
+	orion_time_set_base(TIMER_VIRT_BASE);
+}
+
+static void mv78xx0_timer_init(void)
+{
+	orion_time_init(BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR,
+			IRQ_MV78XX0_TIMER_1, get_tclk());
+}
+
+struct sys_timer mv78xx0_timer = {
+	.init = mv78xx0_timer_init,
+};
+
+
+/*****************************************************************************
+ * General
+ ****************************************************************************/
+static char * __init mv78xx0_id(void)
+{
+	u32 dev, rev;
+
+	mv78xx0_pcie_id(&dev, &rev);
+
+	if (dev == MV78X00_Z0_DEV_ID) {
+		if (rev == MV78X00_REV_Z0)
+			return "MV78X00-Z0";
+		else
+			return "MV78X00-Rev-Unsupported";
+	} else if (dev == MV78100_DEV_ID) {
+		if (rev == MV78100_REV_A0)
+			return "MV78100-A0";
+		else if (rev == MV78100_REV_A1)
+			return "MV78100-A1";
+		else
+			return "MV78100-Rev-Unsupported";
+	} else if (dev == MV78200_DEV_ID) {
+		if (rev == MV78100_REV_A0)
+			return "MV78200-A0";
+		else
+			return "MV78200-Rev-Unsupported";
+	} else {
+		return "Device-Unknown";
+	}
+}
+
+static int __init is_l2_writethrough(void)
+{
+	return !!(readl(CPU_CONTROL) & L2_WRITETHROUGH);
+}
+
+void __init mv78xx0_init(void)
+{
+	int core_index;
+	int hclk;
+	int pclk;
+	int l2clk;
+	int tclk;
+
+	core_index = mv78xx0_core_index();
+	hclk = get_hclk();
+	get_pclk_l2clk(hclk, core_index, &pclk, &l2clk);
+	tclk = get_tclk();
+
+	printk(KERN_INFO "%s ", mv78xx0_id());
+	printk("core #%d, ", core_index);
+	printk("PCLK = %dMHz, ", (pclk + 499999) / 1000000);
+	printk("L2 = %dMHz, ", (l2clk + 499999) / 1000000);
+	printk("HCLK = %dMHz, ", (hclk + 499999) / 1000000);
+	printk("TCLK = %dMHz\n", (tclk + 499999) / 1000000);
+
+	mv78xx0_setup_cpu_mbus();
+
+#ifdef CONFIG_CACHE_FEROCEON_L2
+	feroceon_l2_init(is_l2_writethrough());
+#endif
+}