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authorAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
committerAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
commitb4b6116a13633898cf868f2f103c96a90c4c20f8 (patch)
tree93d1b7e2cfcdf473d8d4ff3ad141fa864f8491f6 /arch/arm/mach-mv78xx0/common.c
parentedd4be777c953e5faafc80d091d3084b4343f5d3 (diff)
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fedora kernel: d9aad82f3319f3cfd1aebc01234254ef0c37ad84v3.3.2-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/arm/mach-mv78xx0/common.c')
-rw-r--r--arch/arm/mach-mv78xx0/common.c416
1 files changed, 416 insertions, 0 deletions
diff --git a/arch/arm/mach-mv78xx0/common.c b/arch/arm/mach-mv78xx0/common.c
new file mode 100644
index 00000000000..a5dcf766a3f
--- /dev/null
+++ b/arch/arm/mach-mv78xx0/common.c
@@ -0,0 +1,416 @@
+/*
+ * 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/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 <plat/addr-map.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(USB0_PHYS_BASE, IRQ_MV78XX0_USB_0, EHCI_PHY_NA);
+}
+
+
+/*****************************************************************************
+ * EHCI1
+ ****************************************************************************/
+void __init mv78xx0_ehci1_init(void)
+{
+ orion_ehci_1_init(USB1_PHYS_BASE, IRQ_MV78XX0_USB_1);
+}
+
+
+/*****************************************************************************
+ * EHCI2
+ ****************************************************************************/
+void __init mv78xx0_ehci2_init(void)
+{
+ orion_ehci_2_init(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,
+ 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,
+ 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,
+ 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,
+ 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, 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
+}
+
+void mv78xx0_restart(char mode, const char *cmd)
+{
+ /*
+ * Enable soft reset to assert RSTOUTn.
+ */
+ writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);
+
+ /*
+ * Assert soft reset.
+ */
+ writel(SOFT_RESET, SYSTEM_SOFT_RESET);
+
+ while (1)
+ ;
+}