Added missing tegra files.HEADmaster

6 files changed, 539 insertions, 0 deletions

diff --git a/arch/unicore32/include/asm/byteorder.h b/arch/unicore32/include/asm/byteorder.h
new file mode 100644
index 00000000000..ebe1b3fef3e
--- /dev/null
+++ b/arch/unicore32/include/asm/byteorder.h
@@ -0,0 +1,24 @@
+/*
+ * linux/arch/unicore32/include/asm/byteorder.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * UniCore ONLY support Little Endian mode, the data bus is connected such
+ * that byte accesses appear as:
+ *  0 = d0...d7, 1 = d8...d15, 2 = d16...d23, 3 = d24...d31
+ * and word accesses (data or instruction) appear as:
+ *  d0...d31
+ */
+#ifndef __UNICORE_BYTEORDER_H__
+#define __UNICORE_BYTEORDER_H__
+
+#include <linux/byteorder/little_endian.h>
+
+#endif
+
diff --git a/arch/unicore32/include/asm/sigcontext.h b/arch/unicore32/include/asm/sigcontext.h
new file mode 100644
index 00000000000..6a2d7671c05
--- /dev/null
+++ b/arch/unicore32/include/asm/sigcontext.h
@@ -0,0 +1,29 @@
+/*
+ * linux/arch/unicore32/include/asm/sigcontext.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __UNICORE_SIGCONTEXT_H__
+#define __UNICORE_SIGCONTEXT_H__
+
+#include <asm/ptrace.h>
+/*
+ * Signal context structure - contains all info to do with the state
+ * before the signal handler was invoked.  Note: only add new entries
+ * to the end of the structure.
+ */
+struct sigcontext {
+        unsigned long trap_no;
+        unsigned long error_code;
+        unsigned long oldmask;
+        unsigned long fault_address;
+        struct pt_regs regs;
+};
+
+#endif
diff --git a/arch/unicore32/include/asm/system.h b/arch/unicore32/include/asm/system.h
new file mode 100644
index 00000000000..246b71c17fd
--- /dev/null
+++ b/arch/unicore32/include/asm/system.h
@@ -0,0 +1,161 @@
+/*
+ * linux/arch/unicore32/include/asm/system.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __UNICORE_SYSTEM_H__
+#define __UNICORE_SYSTEM_H__
+
+#ifdef __KERNEL__
+
+/*
+ * CR1 bits (CP#0 CR1)
+ */
+#define CR_M    (1 << 0)        /* MMU enable                           */
+#define CR_A    (1 << 1)        /* Alignment abort enable               */
+#define CR_D    (1 << 2)        /* Dcache enable                        */
+#define CR_I    (1 << 3)        /* Icache enable                        */
+#define CR_B    (1 << 4)        /* Dcache write mechanism: write back   */
+#define CR_T    (1 << 5)        /* Burst enable                         */
+#define CR_V    (1 << 13)       /* Vectors relocated to 0xffff0000      */
+
+#ifndef __ASSEMBLY__
+
+#include <linux/linkage.h>
+#include <linux/irqflags.h>
+
+struct thread_info;
+struct task_struct;
+
+struct pt_regs;
+
+void die(const char *msg, struct pt_regs *regs, int err);
+
+struct siginfo;
+void uc32_notify_die(const char *str, struct pt_regs *regs,
+                struct siginfo *info, unsigned long err, unsigned long trap);
+
+void hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
+                                       struct pt_regs *),
+                     int sig, int code, const char *name);
+
+#define xchg(ptr, x) \
+        ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
+
+extern asmlinkage void __backtrace(void);
+extern asmlinkage void c_backtrace(unsigned long fp, int pmode);
+
+struct mm_struct;
+extern void show_pte(struct mm_struct *mm, unsigned long addr);
+extern void __show_regs(struct pt_regs *);
+
+extern int cpu_architecture(void);
+extern void cpu_init(void);
+
+#define vectors_high()  (cr_alignment & CR_V)
+
+#define isb() __asm__ __volatile__ ("" : : : "memory")
+#define dsb() __asm__ __volatile__ ("" : : : "memory")
+#define dmb() __asm__ __volatile__ ("" : : : "memory")
+
+#define mb()            barrier()
+#define rmb()           barrier()
+#define wmb()           barrier()
+#define smp_mb()        barrier()
+#define smp_rmb()       barrier()
+#define smp_wmb()       barrier()
+#define read_barrier_depends()          do { } while (0)
+#define smp_read_barrier_depends()      do { } while (0)
+
+#define set_mb(var, value)      do { var = value; smp_mb(); } while (0)
+#define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
+
+extern unsigned long cr_no_alignment;   /* defined in entry-unicore.S */
+extern unsigned long cr_alignment;      /* defined in entry-unicore.S */
+
+static inline unsigned int get_cr(void)
+{
+        unsigned int val;
+        asm("movc %0, p0.c1, #0" : "=r" (val) : : "cc");
+        return val;
+}
+
+static inline void set_cr(unsigned int val)
+{
+        asm volatile("movc p0.c1, %0, #0        @set CR"
+          : : "r" (val) : "cc");
+        isb();
+}
+
+extern void adjust_cr(unsigned long mask, unsigned long set);
+
+/*
+ * switch_to(prev, next) should switch from task `prev' to `next'
+ * `prev' will never be the same as `next'.  schedule() itself
+ * contains the memory barrier to tell GCC not to cache `current'.
+ */
+extern struct task_struct *__switch_to(struct task_struct *,
+                struct thread_info *, struct thread_info *);
+extern void panic(const char *fmt, ...);
+
+#define switch_to(prev, next, last)                                     \
+do {                                                                    \
+        last = __switch_to(prev,                                        \
+                task_thread_info(prev), task_thread_info(next));        \
+} while (0)
+
+static inline unsigned long
+__xchg(unsigned long x, volatile void *ptr, int size)
+{
+        unsigned long ret;
+
+        switch (size) {
+        case 1:
+                asm volatile("@ __xchg1\n"
+                "       swapb   %0, %1, [%2]"
+                        : "=&r" (ret)
+                        : "r" (x), "r" (ptr)
+                        : "memory", "cc");
+                break;
+        case 4:
+                asm volatile("@ __xchg4\n"
+                "       swapw   %0, %1, [%2]"
+                        : "=&r" (ret)
+                        : "r" (x), "r" (ptr)
+                        : "memory", "cc");
+                break;
+        default:
+                panic("xchg: bad data size: ptr 0x%p, size %d\n",
+                        ptr, size);
+        }
+
+        return ret;
+}
+
+#include <asm-generic/cmpxchg-local.h>
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define cmpxchg_local(ptr, o, n)                                        \
+                ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr),     \
+                (unsigned long)(o), (unsigned long)(n), sizeof(*(ptr))))
+#define cmpxchg64_local(ptr, o, n)                                      \
+                __cmpxchg64_local_generic((ptr), (o), (n))
+
+#include <asm-generic/cmpxchg.h>
+
+#endif /* __ASSEMBLY__ */
+
+#define arch_align_stack(x) (x)
+
+#endif /* __KERNEL__ */
+
+#endif
diff --git a/arch/unicore32/include/asm/unistd.h b/arch/unicore32/include/asm/unistd.h
new file mode 100644
index 00000000000..9b242801996
--- /dev/null
+++ b/arch/unicore32/include/asm/unistd.h
@@ -0,0 +1,18 @@
+/*
+ * linux/arch/unicore32/include/asm/unistd.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#if !defined(__UNICORE_UNISTD_H__) || defined(__SYSCALL)
+#define __UNICORE_UNISTD_H__
+
+/* Use the standard ABI for syscalls. */
+#include <asm-generic/unistd.h>
+
+#endif /* __UNICORE_UNISTD_H__ */
diff --git a/arch/unicore32/kernel/init_task.c b/arch/unicore32/kernel/init_task.c
new file mode 100644
index 00000000000..a35a1e50e4f
--- /dev/null
+++ b/arch/unicore32/kernel/init_task.c
@@ -0,0 +1,44 @@
+/*
+ * linux/arch/unicore32/kernel/init_task.c
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/init_task.h>
+#include <linux/mqueue.h>
+#include <linux/uaccess.h>
+
+#include <asm/pgtable.h>
+
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+/*
+ * Initial thread structure.
+ *
+ * We need to make sure that this is 8192-byte aligned due to the
+ * way process stacks are handled. This is done by making sure
+ * the linker maps this in the .text segment right after head.S,
+ * and making head.S ensure the proper alignment.
+ *
+ * The things we do for performance..
+ */
+union thread_union init_thread_union __init_task_data = {
+        INIT_THREAD_INFO(init_task) };
+
+/*
+ * Initial task structure.
+ *
+ * All other task structs will be allocated on slabs in fork.c
+ */
+struct task_struct init_task = INIT_TASK(init_task);
+EXPORT_SYMBOL(init_task);
diff --git a/arch/unicore32/kernel/pwm.c b/arch/unicore32/kernel/pwm.c
new file mode 100644
index 00000000000..4615d51e3ba
--- /dev/null
+++ b/arch/unicore32/kernel/pwm.c
@@ -0,0 +1,263 @@
+/*
+ * linux/arch/unicore32/kernel/pwm.c
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ *      Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
+ *      Copyright (C) 2001-2010 Guan Xuetao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/pwm.h>
+
+#include <asm/div64.h>
+#include <mach/hardware.h>
+
+struct pwm_device {
+        struct list_head        node;
+        struct platform_device *pdev;
+
+        const char      *label;
+        struct clk      *clk;
+        int             clk_enabled;
+
+        unsigned int    use_count;
+        unsigned int    pwm_id;
+};
+
+/*
+ * period_ns = 10^9 * (PRESCALE + 1) * (PV + 1) / PWM_CLK_RATE
+ * duty_ns   = 10^9 * (PRESCALE + 1) * DC / PWM_CLK_RATE
+ */
+int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
+{
+        unsigned long long c;
+        unsigned long period_cycles, prescale, pv, dc;
+
+        if (pwm == NULL || period_ns == 0 || duty_ns > period_ns)
+                return -EINVAL;
+
+        c = clk_get_rate(pwm->clk);
+        c = c * period_ns;
+        do_div(c, 1000000000);
+        period_cycles = c;
+
+        if (period_cycles < 1)
+                period_cycles = 1;
+        prescale = (period_cycles - 1) / 1024;
+        pv = period_cycles / (prescale + 1) - 1;
+
+        if (prescale > 63)
+                return -EINVAL;
+
+        if (duty_ns == period_ns)
+                dc = OST_PWMDCCR_FDCYCLE;
+        else
+                dc = (pv + 1) * duty_ns / period_ns;
+
+        /* NOTE: the clock to PWM has to be enabled first
+         * before writing to the registers
+         */
+        clk_enable(pwm->clk);
+        OST_PWMPWCR = prescale;
+        OST_PWMDCCR = pv - dc;
+        OST_PWMPCR  = pv;
+        clk_disable(pwm->clk);
+
+        return 0;
+}
+EXPORT_SYMBOL(pwm_config);
+
+int pwm_enable(struct pwm_device *pwm)
+{
+        int rc = 0;
+
+        if (!pwm->clk_enabled) {
+                rc = clk_enable(pwm->clk);
+                if (!rc)
+                        pwm->clk_enabled = 1;
+        }
+        return rc;
+}
+EXPORT_SYMBOL(pwm_enable);
+
+void pwm_disable(struct pwm_device *pwm)
+{
+        if (pwm->clk_enabled) {
+                clk_disable(pwm->clk);
+                pwm->clk_enabled = 0;
+        }
+}
+EXPORT_SYMBOL(pwm_disable);
+
+static DEFINE_MUTEX(pwm_lock);
+static LIST_HEAD(pwm_list);
+
+struct pwm_device *pwm_request(int pwm_id, const char *label)
+{
+        struct pwm_device *pwm;
+        int found = 0;
+
+        mutex_lock(&pwm_lock);
+
+        list_for_each_entry(pwm, &pwm_list, node) {
+                if (pwm->pwm_id == pwm_id) {
+                        found = 1;
+                        break;
+                }
+        }
+
+        if (found) {
+                if (pwm->use_count == 0) {
+                        pwm->use_count++;
+                        pwm->label = label;
+                } else
+                        pwm = ERR_PTR(-EBUSY);
+        } else
+                pwm = ERR_PTR(-ENOENT);
+
+        mutex_unlock(&pwm_lock);
+        return pwm;
+}
+EXPORT_SYMBOL(pwm_request);
+
+void pwm_free(struct pwm_device *pwm)
+{
+        mutex_lock(&pwm_lock);
+
+        if (pwm->use_count) {
+                pwm->use_count--;
+                pwm->label = NULL;
+        } else
+                pr_warning("PWM device already freed\n");
+
+        mutex_unlock(&pwm_lock);
+}
+EXPORT_SYMBOL(pwm_free);
+
+static inline void __add_pwm(struct pwm_device *pwm)
+{
+        mutex_lock(&pwm_lock);
+        list_add_tail(&pwm->node, &pwm_list);
+        mutex_unlock(&pwm_lock);
+}
+
+static struct pwm_device *pwm_probe(struct platform_device *pdev,
+                unsigned int pwm_id, struct pwm_device *parent_pwm)
+{
+        struct pwm_device *pwm;
+        struct resource *r;
+        int ret = 0;
+
+        pwm = kzalloc(sizeof(struct pwm_device), GFP_KERNEL);
+        if (pwm == NULL) {
+                dev_err(&pdev->dev, "failed to allocate memory\n");
+                return ERR_PTR(-ENOMEM);
+        }
+
+        pwm->clk = clk_get(NULL, "OST_CLK");
+        if (IS_ERR(pwm->clk)) {
+                ret = PTR_ERR(pwm->clk);
+                goto err_free;
+        }
+        pwm->clk_enabled = 0;
+
+        pwm->use_count = 0;
+        pwm->pwm_id = pwm_id;
+        pwm->pdev = pdev;
+
+        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (r == NULL) {
+                dev_err(&pdev->dev, "no memory resource defined\n");
+                ret = -ENODEV;
+                goto err_free_clk;
+        }
+
+        r = request_mem_region(r->start, resource_size(r), pdev->name);
+        if (r == NULL) {
+                dev_err(&pdev->dev, "failed to request memory resource\n");
+                ret = -EBUSY;
+                goto err_free_clk;
+        }
+
+        __add_pwm(pwm);
+        platform_set_drvdata(pdev, pwm);
+        return pwm;
+
+err_free_clk:
+        clk_put(pwm->clk);
+err_free:
+        kfree(pwm);
+        return ERR_PTR(ret);
+}
+
+static int __devinit puv3_pwm_probe(struct platform_device *pdev)
+{
+        struct pwm_device *pwm = pwm_probe(pdev, pdev->id, NULL);
+
+        if (IS_ERR(pwm))
+                return PTR_ERR(pwm);
+
+        return 0;
+}
+
+static int __devexit pwm_remove(struct platform_device *pdev)
+{
+        struct pwm_device *pwm;
+        struct resource *r;
+
+        pwm = platform_get_drvdata(pdev);
+        if (pwm == NULL)
+                return -ENODEV;
+
+        mutex_lock(&pwm_lock);
+        list_del(&pwm->node);
+        mutex_unlock(&pwm_lock);
+
+        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        release_mem_region(r->start, resource_size(r));
+
+        clk_put(pwm->clk);
+        kfree(pwm);
+        return 0;
+}
+
+static struct platform_driver puv3_pwm_driver = {
+        .driver         = {
+                .name   = "PKUnity-v3-PWM",
+        },
+        .probe          = puv3_pwm_probe,
+        .remove         = __devexit_p(pwm_remove),
+};
+
+static int __init pwm_init(void)
+{
+        int ret = 0;
+
+        ret = platform_driver_register(&puv3_pwm_driver);
+        if (ret) {
+                printk(KERN_ERR "failed to register puv3_pwm_driver\n");
+                return ret;
+        }
+
+        return ret;
+}
+arch_initcall(pwm_init);
+
+static void __exit pwm_exit(void)
+{
+        platform_driver_unregister(&puv3_pwm_driver);
+}
+module_exit(pwm_exit);
+
+MODULE_LICENSE("GPL v2");