MIPS: Lemote 2F: Add basic CS5536 VSM support

Lemote Loongson 2F family machines use CS5536 as their south bridge and need
these lowlevel interfaces to access the devices on CS5536.

Virtualize the legacy devices on CS5536 as PCI devices.  This way users can
access the CS5536 PCI config space directly as a normal multi-function
PCI 2.2 device.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: zhangfx@lemote.com
Cc: yanh@lemote.com 
Cc: huhb@lemote.com
Cc: Nicholas Mc Guire <hofrat@hofr.at>
Cc: Arnaud Patard <apatard@mandriva.com>
Cc: loongson-dev@googlegroups.com
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

3 files changed, 489 insertions, 0 deletions

diff --git a/arch/mips/include/asm/mach-loongson/cs5536/cs5536.h b/arch/mips/include/asm/mach-loongson/cs5536/cs5536.h
new file mode 100644
index 000000000000..021f77ca59ec
--- /dev/null
+++ b/arch/mips/include/asm/mach-loongson/cs5536/cs5536.h
@@ -0,0 +1,305 @@
+/*
+ * The header file of cs5536 sourth bridge.
+ *
+ * Copyright (C) 2007 Lemote, Inc.
+ * Author : jlliu <liujl@lemote.com>
+ */
+
+#ifndef _CS5536_H
+#define _CS5536_H
+
+#include <linux/types.h>
+
+extern void _rdmsr(u32 msr, u32 *hi, u32 *lo);
+extern void _wrmsr(u32 msr, u32 hi, u32 lo);
+
+/*
+ * MSR module base
+ */
+#define CS5536_SB_MSR_BASE      (0x00000000)
+#define CS5536_GLIU_MSR_BASE    (0x10000000)
+#define CS5536_ILLEGAL_MSR_BASE (0x20000000)
+#define CS5536_USB_MSR_BASE     (0x40000000)
+#define CS5536_IDE_MSR_BASE     (0x60000000)
+#define CS5536_DIVIL_MSR_BASE   (0x80000000)
+#define CS5536_ACC_MSR_BASE     (0xa0000000)
+#define CS5536_UNUSED_MSR_BASE  (0xc0000000)
+#define CS5536_GLCP_MSR_BASE    (0xe0000000)
+
+#define SB_MSR_REG(offset)      (CS5536_SB_MSR_BASE     | (offset))
+#define GLIU_MSR_REG(offset)    (CS5536_GLIU_MSR_BASE   | (offset))
+#define ILLEGAL_MSR_REG(offset) (CS5536_ILLEGAL_MSR_BASE | (offset))
+#define USB_MSR_REG(offset)     (CS5536_USB_MSR_BASE    | (offset))
+#define IDE_MSR_REG(offset)     (CS5536_IDE_MSR_BASE    | (offset))
+#define DIVIL_MSR_REG(offset)   (CS5536_DIVIL_MSR_BASE  | (offset))
+#define ACC_MSR_REG(offset)     (CS5536_ACC_MSR_BASE    | (offset))
+#define UNUSED_MSR_REG(offset)  (CS5536_UNUSED_MSR_BASE | (offset))
+#define GLCP_MSR_REG(offset)    (CS5536_GLCP_MSR_BASE   | (offset))
+
+/*
+ * BAR SPACE OF VIRTUAL PCI :
+ * range for pci probe use, length is the actual size.
+ */
+/* IO space for all DIVIL modules */
+#define CS5536_IRQ_RANGE        0xffffffe0 /* USERD FOR PCI PROBE */
+#define CS5536_IRQ_LENGTH       0x20    /* THE REGS ACTUAL LENGTH */
+#define CS5536_SMB_RANGE        0xfffffff8
+#define CS5536_SMB_LENGTH       0x08
+#define CS5536_GPIO_RANGE       0xffffff00
+#define CS5536_GPIO_LENGTH      0x100
+#define CS5536_MFGPT_RANGE      0xffffffc0
+#define CS5536_MFGPT_LENGTH     0x40
+#define CS5536_ACPI_RANGE       0xffffffe0
+#define CS5536_ACPI_LENGTH      0x20
+#define CS5536_PMS_RANGE        0xffffff80
+#define CS5536_PMS_LENGTH       0x80
+/* IO space for IDE */
+#define CS5536_IDE_RANGE        0xfffffff0
+#define CS5536_IDE_LENGTH       0x10
+/* IO space for ACC */
+#define CS5536_ACC_RANGE        0xffffff80
+#define CS5536_ACC_LENGTH       0x80
+/* MEM space for ALL USB modules */
+#define CS5536_OHCI_RANGE       0xfffff000
+#define CS5536_OHCI_LENGTH      0x1000
+#define CS5536_EHCI_RANGE       0xfffff000
+#define CS5536_EHCI_LENGTH      0x1000
+
+/*
+ * PCI MSR ACCESS
+ */
+#define PCI_MSR_CTRL            0xF0
+#define PCI_MSR_ADDR            0xF4
+#define PCI_MSR_DATA_LO         0xF8
+#define PCI_MSR_DATA_HI         0xFC
+
+/**************** MSR *****************************/
+
+/*
+ * GLIU STANDARD MSR
+ */
+#define GLIU_CAP                0x00
+#define GLIU_CONFIG             0x01
+#define GLIU_SMI                0x02
+#define GLIU_ERROR              0x03
+#define GLIU_PM                 0x04
+#define GLIU_DIAG               0x05
+
+/*
+ * GLIU SPEC. MSR
+ */
+#define GLIU_P2D_BM0            0x20
+#define GLIU_P2D_BM1            0x21
+#define GLIU_P2D_BM2            0x22
+#define GLIU_P2D_BMK0           0x23
+#define GLIU_P2D_BMK1           0x24
+#define GLIU_P2D_BM3            0x25
+#define GLIU_P2D_BM4            0x26
+#define GLIU_COH                0x80
+#define GLIU_PAE                0x81
+#define GLIU_ARB                0x82
+#define GLIU_ASMI               0x83
+#define GLIU_AERR               0x84
+#define GLIU_DEBUG              0x85
+#define GLIU_PHY_CAP            0x86
+#define GLIU_NOUT_RESP          0x87
+#define GLIU_NOUT_WDATA         0x88
+#define GLIU_WHOAMI             0x8B
+#define GLIU_SLV_DIS            0x8C
+#define GLIU_IOD_BM0            0xE0
+#define GLIU_IOD_BM1            0xE1
+#define GLIU_IOD_BM2            0xE2
+#define GLIU_IOD_BM3            0xE3
+#define GLIU_IOD_BM4            0xE4
+#define GLIU_IOD_BM5            0xE5
+#define GLIU_IOD_BM6            0xE6
+#define GLIU_IOD_BM7            0xE7
+#define GLIU_IOD_BM8            0xE8
+#define GLIU_IOD_BM9            0xE9
+#define GLIU_IOD_SC0            0xEA
+#define GLIU_IOD_SC1            0xEB
+#define GLIU_IOD_SC2            0xEC
+#define GLIU_IOD_SC3            0xED
+#define GLIU_IOD_SC4            0xEE
+#define GLIU_IOD_SC5            0xEF
+#define GLIU_IOD_SC6            0xF0
+#define GLIU_IOD_SC7            0xF1
+
+/*
+ * SB STANDARD
+ */
+#define SB_CAP          0x00
+#define SB_CONFIG       0x01
+#define SB_SMI          0x02
+#define SB_ERROR        0x03
+#define SB_MAR_ERR_EN           0x00000001
+#define SB_TAR_ERR_EN           0x00000002
+#define SB_RSVD_BIT1            0x00000004
+#define SB_EXCEP_ERR_EN         0x00000008
+#define SB_SYSE_ERR_EN          0x00000010
+#define SB_PARE_ERR_EN          0x00000020
+#define SB_TAS_ERR_EN           0x00000040
+#define SB_MAR_ERR_FLAG         0x00010000
+#define SB_TAR_ERR_FLAG         0x00020000
+#define SB_RSVD_BIT2            0x00040000
+#define SB_EXCEP_ERR_FLAG       0x00080000
+#define SB_SYSE_ERR_FLAG        0x00100000
+#define SB_PARE_ERR_FLAG        0x00200000
+#define SB_TAS_ERR_FLAG         0x00400000
+#define SB_PM           0x04
+#define SB_DIAG         0x05
+
+/*
+ * SB SPEC.
+ */
+#define SB_CTRL         0x10
+#define SB_R0           0x20
+#define SB_R1           0x21
+#define SB_R2           0x22
+#define SB_R3           0x23
+#define SB_R4           0x24
+#define SB_R5           0x25
+#define SB_R6           0x26
+#define SB_R7           0x27
+#define SB_R8           0x28
+#define SB_R9           0x29
+#define SB_R10          0x2A
+#define SB_R11          0x2B
+#define SB_R12          0x2C
+#define SB_R13          0x2D
+#define SB_R14          0x2E
+#define SB_R15          0x2F
+
+/*
+ * GLCP STANDARD
+ */
+#define GLCP_CAP                0x00
+#define GLCP_CONFIG             0x01
+#define GLCP_SMI                0x02
+#define GLCP_ERROR              0x03
+#define GLCP_PM                 0x04
+#define GLCP_DIAG               0x05
+
+/*
+ * GLCP SPEC.
+ */
+#define GLCP_CLK_DIS_DELAY      0x08
+#define GLCP_PM_CLK_DISABLE     0x09
+#define GLCP_GLB_PM             0x0B
+#define GLCP_DBG_OUT            0x0C
+#define GLCP_RSVD1              0x0D
+#define GLCP_SOFT_COM           0x0E
+#define SOFT_BAR_SMB_FLAG       0x00000001
+#define SOFT_BAR_GPIO_FLAG      0x00000002
+#define SOFT_BAR_MFGPT_FLAG     0x00000004
+#define SOFT_BAR_IRQ_FLAG       0x00000008
+#define SOFT_BAR_PMS_FLAG       0x00000010
+#define SOFT_BAR_ACPI_FLAG      0x00000020
+#define SOFT_BAR_IDE_FLAG       0x00000400
+#define SOFT_BAR_ACC_FLAG       0x00000800
+#define SOFT_BAR_OHCI_FLAG      0x00001000
+#define SOFT_BAR_EHCI_FLAG      0x00002000
+#define GLCP_RSVD2              0x0F
+#define GLCP_CLK_OFF            0x10
+#define GLCP_CLK_ACTIVE         0x11
+#define GLCP_CLK_DISABLE        0x12
+#define GLCP_CLK4ACK            0x13
+#define GLCP_SYS_RST            0x14
+#define GLCP_RSVD3              0x15
+#define GLCP_DBG_CLK_CTRL       0x16
+#define GLCP_CHIP_REV_ID        0x17
+
+/* PIC */
+#define PIC_YSEL_LOW            0x20
+#define PIC_YSEL_LOW_USB_SHIFT          8
+#define PIC_YSEL_LOW_ACC_SHIFT          16
+#define PIC_YSEL_LOW_FLASH_SHIFT        24
+#define PIC_YSEL_HIGH           0x21
+#define PIC_ZSEL_LOW            0x22
+#define PIC_ZSEL_HIGH           0x23
+#define PIC_IRQM_PRIM           0x24
+#define PIC_IRQM_LPC            0x25
+#define PIC_XIRR_STS_LOW        0x26
+#define PIC_XIRR_STS_HIGH       0x27
+#define PCI_SHDW                0x34
+
+/*
+ * DIVIL STANDARD
+ */
+#define DIVIL_CAP               0x00
+#define DIVIL_CONFIG            0x01
+#define DIVIL_SMI               0x02
+#define DIVIL_ERROR             0x03
+#define DIVIL_PM                0x04
+#define DIVIL_DIAG              0x05
+
+/*
+ * DIVIL SPEC.
+ */
+#define DIVIL_LBAR_IRQ          0x08
+#define DIVIL_LBAR_KEL          0x09
+#define DIVIL_LBAR_SMB          0x0B
+#define DIVIL_LBAR_GPIO         0x0C
+#define DIVIL_LBAR_MFGPT        0x0D
+#define DIVIL_LBAR_ACPI         0x0E
+#define DIVIL_LBAR_PMS          0x0F
+#define DIVIL_LEG_IO            0x14
+#define DIVIL_BALL_OPTS         0x15
+#define DIVIL_SOFT_IRQ          0x16
+#define DIVIL_SOFT_RESET        0x17
+
+/* MFGPT */
+#define MFGPT_IRQ       0x28
+
+/*
+ * IDE STANDARD
+ */
+#define IDE_CAP         0x00
+#define IDE_CONFIG      0x01
+#define IDE_SMI         0x02
+#define IDE_ERROR       0x03
+#define IDE_PM          0x04
+#define IDE_DIAG        0x05
+
+/*
+ * IDE SPEC.
+ */
+#define IDE_IO_BAR      0x08
+#define IDE_CFG         0x10
+#define IDE_DTC         0x12
+#define IDE_CAST        0x13
+#define IDE_ETC         0x14
+#define IDE_INTERNAL_PM 0x15
+
+/*
+ * ACC STANDARD
+ */
+#define ACC_CAP         0x00
+#define ACC_CONFIG      0x01
+#define ACC_SMI         0x02
+#define ACC_ERROR       0x03
+#define ACC_PM          0x04
+#define ACC_DIAG        0x05
+
+/*
+ * USB STANDARD
+ */
+#define USB_CAP         0x00
+#define USB_CONFIG      0x01
+#define USB_SMI         0x02
+#define USB_ERROR       0x03
+#define USB_PM          0x04
+#define USB_DIAG        0x05
+
+/*
+ * USB SPEC.
+ */
+#define USB_OHCI        0x08
+#define USB_EHCI        0x09
+
+/****************** NATIVE ***************************/
+/* GPIO : I/O SPACE; REG : 32BITS */
+#define GPIOL_OUT_VAL           0x00
+#define GPIOL_OUT_EN            0x04
+
+#endif                          /* _CS5536_H */
diff --git a/arch/mips/include/asm/mach-loongson/cs5536/cs5536_pci.h b/arch/mips/include/asm/mach-loongson/cs5536/cs5536_pci.h
new file mode 100644
index 000000000000..0dca9c89ee7c
--- /dev/null
+++ b/arch/mips/include/asm/mach-loongson/cs5536/cs5536_pci.h
@@ -0,0 +1,153 @@
+/*
+ * the definition file of cs5536 Virtual Support Module(VSM).
+ * pci configuration space can be accessed through the VSM, so
+ * there is no need of the MSR read/write now, except the spec.
+ * MSR registers which are not implemented yet.
+ *
+ * Copyright (C) 2007 Lemote Inc.
+ * Author : jlliu, liujl@lemote.com
+ */
+
+#ifndef _CS5536_PCI_H
+#define _CS5536_PCI_H
+
+#include <linux/types.h>
+#include <linux/pci_regs.h>
+
+extern void cs5536_pci_conf_write4(int function, int reg, u32 value);
+extern u32 cs5536_pci_conf_read4(int function, int reg);
+
+#define CS5536_ACC_INTR         9
+#define CS5536_IDE_INTR         14
+#define CS5536_USB_INTR         11
+#define CS5536_MFGPT_INTR       5
+#define CS5536_UART1_INTR       4
+#define CS5536_UART2_INTR       3
+
+/************** PCI BUS DEVICE FUNCTION ***************/
+
+/*
+ * PCI bus device function
+ */
+#define PCI_BUS_CS5536          0
+#define PCI_IDSEL_CS5536        14
+
+/********** STANDARD PCI-2.2 EXPANSION ****************/
+
+/*
+ * PCI configuration space
+ * we have to virtualize the PCI configure space head, so we should
+ * define the necessary IDs and some others.
+ */
+
+/* CONFIG of PCI VENDOR ID*/
+#define CFG_PCI_VENDOR_ID(mod_dev_id, sys_vendor_id) \
+        (((mod_dev_id) << 16) | (sys_vendor_id))
+
+/* VENDOR ID */
+#define CS5536_VENDOR_ID        0x1022
+
+/* DEVICE ID */
+#define CS5536_ISA_DEVICE_ID            0x2090
+#define CS5536_IDE_DEVICE_ID            0x209a
+#define CS5536_ACC_DEVICE_ID            0x2093
+#define CS5536_OHCI_DEVICE_ID           0x2094
+#define CS5536_EHCI_DEVICE_ID           0x2095
+
+/* CLASS CODE : CLASS SUB-CLASS INTERFACE */
+#define CS5536_ISA_CLASS_CODE           0x060100
+#define CS5536_IDE_CLASS_CODE           0x010180
+#define CS5536_ACC_CLASS_CODE           0x040100
+#define CS5536_OHCI_CLASS_CODE          0x0C0310
+#define CS5536_EHCI_CLASS_CODE          0x0C0320
+
+/* BHLC : BIST HEADER-TYPE LATENCY-TIMER CACHE-LINE-SIZE */
+
+#define CFG_PCI_CACHE_LINE_SIZE(header_type, latency_timer)     \
+        ((PCI_NONE_BIST << 24) | ((header_type) << 16) \
+                | ((latency_timer) << 8) | PCI_NORMAL_CACHE_LINE_SIZE);
+
+#define PCI_NONE_BIST                   0x00    /* RO not implemented yet. */
+#define PCI_BRIDGE_HEADER_TYPE          0x80    /* RO */
+#define PCI_NORMAL_HEADER_TYPE          0x00
+#define PCI_NORMAL_LATENCY_TIMER        0x00
+#define PCI_NORMAL_CACHE_LINE_SIZE      0x08    /* RW */
+
+/* BAR */
+#define PCI_BAR0_REG                    0x10
+#define PCI_BAR1_REG                    0x14
+#define PCI_BAR2_REG                    0x18
+#define PCI_BAR3_REG                    0x1c
+#define PCI_BAR4_REG                    0x20
+#define PCI_BAR5_REG                    0x24
+#define PCI_BAR_COUNT                   6
+#define PCI_BAR_RANGE_MASK              0xFFFFFFFF
+
+/* CARDBUS CIS POINTER */
+#define PCI_CARDBUS_CIS_POINTER         0x00000000
+
+/* SUBSYSTEM VENDOR ID  */
+#define CS5536_SUB_VENDOR_ID            CS5536_VENDOR_ID
+
+/* SUBSYSTEM ID */
+#define CS5536_ISA_SUB_ID               CS5536_ISA_DEVICE_ID
+#define CS5536_IDE_SUB_ID               CS5536_IDE_DEVICE_ID
+#define CS5536_ACC_SUB_ID               CS5536_ACC_DEVICE_ID
+#define CS5536_OHCI_SUB_ID              CS5536_OHCI_DEVICE_ID
+#define CS5536_EHCI_SUB_ID              CS5536_EHCI_DEVICE_ID
+
+/* EXPANSION ROM BAR */
+#define PCI_EXPANSION_ROM_BAR           0x00000000
+
+/* CAPABILITIES POINTER */
+#define PCI_CAPLIST_POINTER             0x00000000
+#define PCI_CAPLIST_USB_POINTER         0x40
+/* INTERRUPT */
+
+#define CFG_PCI_INTERRUPT_LINE(pin, mod_intr) \
+        ((PCI_MAX_LATENCY << 24) | (PCI_MIN_GRANT << 16) | \
+                ((pin) << 8) | (mod_intr))
+
+#define PCI_MAX_LATENCY                 0x40
+#define PCI_MIN_GRANT                   0x00
+#define PCI_DEFAULT_PIN                 0x01
+
+/*********** EXPANSION PCI REG ************************/
+
+/*
+ * ISA EXPANSION
+ */
+#define PCI_UART1_INT_REG       0x50
+#define PCI_UART2_INT_REG       0x54
+#define PCI_ISA_FIXUP_REG       0x58
+
+/*
+ * IDE EXPANSION
+ */
+#define PCI_IDE_CFG_REG         0x40
+#define CS5536_IDE_FLASH_SIGNATURE      0xDEADBEEF
+#define PCI_IDE_DTC_REG         0x48
+#define PCI_IDE_CAST_REG        0x4C
+#define PCI_IDE_ETC_REG         0x50
+#define PCI_IDE_PM_REG          0x54
+#define PCI_IDE_INT_REG         0x60
+
+/*
+ * ACC EXPANSION
+ */
+#define PCI_ACC_INT_REG         0x50
+
+/*
+ * OHCI EXPANSION : INTTERUPT IS IMPLEMENTED BY THE OHCI
+ */
+#define PCI_OHCI_PM_REG         0x40
+#define PCI_OHCI_INT_REG        0x50
+
+/*
+ * EHCI EXPANSION
+ */
+#define PCI_EHCI_LEGSMIEN_REG   0x50
+#define PCI_EHCI_LEGSMISTS_REG  0x54
+#define PCI_EHCI_FLADJ_REG      0x60
+
+#endif                          /* _CS5536_PCI_H_ */
diff --git a/arch/mips/include/asm/mach-loongson/cs5536/cs5536_vsm.h b/arch/mips/include/asm/mach-loongson/cs5536/cs5536_vsm.h
new file mode 100644
index 000000000000..6305bea7e18e
--- /dev/null
+++ b/arch/mips/include/asm/mach-loongson/cs5536/cs5536_vsm.h
@@ -0,0 +1,31 @@
+/*
+ * the read/write interfaces for Virtual Support Module(VSM)
+ *
+ * Copyright (C) 2009 Lemote, Inc.
+ * Author: Wu Zhangjin <wuzj@lemote.com>
+ */
+
+#ifndef _CS5536_VSM_H
+#define _CS5536_VSM_H
+
+#include <linux/types.h>
+
+typedef void (*cs5536_pci_vsm_write)(int reg, u32 value);
+typedef u32 (*cs5536_pci_vsm_read)(int reg);
+
+#define DECLARE_CS5536_MODULE(name) \
+extern void pci_##name##_write_reg(int reg, u32 value); \
+extern u32 pci_##name##_read_reg(int reg);
+
+/* ide module */
+DECLARE_CS5536_MODULE(ide)
+/* acc module */
+DECLARE_CS5536_MODULE(acc)
+/* ohci module */
+DECLARE_CS5536_MODULE(ohci)
+/* isa module */
+DECLARE_CS5536_MODULE(isa)
+/* ehci module */
+DECLARE_CS5536_MODULE(ehci)
+
+#endif                          /* _CS5536_VSM_H */